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The Holodiscus taxonomy is confused because oceanspray, rockspirea (H. dumosus), and small-leaved rockspirea (H. microphyllus) are taxonomically and morphologically very similar [45,163]. Authorities separating these 3 closely related taxa do so based on different leaf morphologies [45,136] and distributions . This review follows the taxonomy of Lis (in ), who authored the Flora of North America's  Holodiscus chapter. In Lis's treatment, oceanspray, rockspirea, and small-leaved rockspirea are treated as separate and distinct species . Some systematists lump either oceanspray and rockspirea [104,236], oceanspray and small-leaved rockspirea , or all 3 taxa  into single species.SYNONYMS:
Conifer communities: Oceanspray is called "the most widespread and possibly the most abundant flowering shrub" in coniferous forests of northeastern Washington and northern Idaho . On the Umatilla National Forest, Washington, it is dominant in coast Douglas-fir (Pseudotsuga menziesii var. menziesii), grand fir (Abies grandis), and western larch (Larix occidentalis) forests .
|In Oregon, coast Douglas-fir/oceanspray associations on the Willamette National Forest are primarily structurally diverse old-growth stands, containing long-lived canopy trees and a subcanopy of younger trees. Most of the stands are >150 years old . Oceanspray is common to dominant in dry white fir (A. concolor) forests in the Siskiyou Mountains of southwestern Oregon , and it is an important shrub in Port-Orford-cedar (Chamaecyparis lawsoniana) communities of southwestern Oregon and northwestern California . It is important in many mixed-conifer forests of southern Oregon and California [33,34]. These communities are codominated by Pacific ponderosa pine (P. ponderosa var. ponderosa), coast Douglas-fir, Jeffrey pine (P. jeffreyi), California black oak (Quercus kelloggii), tanoak (Lithocarpus densiflorus), and/or canyon live oak (Q. chrysolepis) . Oceanspray is also important in knobcone pine (P. attenuata) communities of southern Oregon and California .|
|Oceanspray in mixed-conifer forest of Oregon's Cascade Range. Photo permission of Craig Smith.|
In California, oceanspray is a characteristic to dominant species of redwood (Sequoia sempervirens) [202,254], Pacific ponderosa pine , shore pine (P. contorta var. contorta) , and Sierra Nevada lodgepole pine (P. c. var. murrayana)  forests. It is a minor species in pinyon-juniper (Pinus-Juniperus spp.) communities .
Oceanspray is associated with Rocky Mountain Douglas-fir (Pseudotsuga menziesii var. glauca) and Rocky Mountain lodgepole pine (Pinus contorta var. latifolia) in northern Idaho ; it is commonly dominant in Rocky Mountain Douglas-fir forests of northern Idaho and Montana [178,217,225]. It is infrequent to common in western redcedar-western hemlock (Tsuga heterophylla-Thuja plicata)) forests of the Interior Pacific Northwest and the Northern Rocky Mountains [148,186].
Hardwood communities: Oceanspray occurs in the understories of Oregon white oak (Q. garryana) communities throughout Oregon white oak's range ([147,185,216], review by ). It also occurs or dominates in other montane oak (Quercus spp.) communities in California .
Riparian: Oceanspray occurs in riparian communities throughout its range (review by ). Overstory dominants may be conifers, hardwoods or a mix [112,219]. Meriwether Lewis made the first scientific collection of oceanspray on the banks of the Clearwater River in Idaho . Oceanspray is dominant in grand fir floodplain associations of eastern Washington . In western hemlock stands in the central Cascade Range of Washington, it was more common on high floodplains than on low floodplains . On Myrtle Island Research Natural Area, Oregon, oceanspray is occasional in red alder-Oregon ash (Alnus rubra-Fraxinus latifolia) and willow/field horsetail (Salix spp./Equisetum arvense) riparian communities .
Shrublands: Oceanspray is common to dominant in mixed montane shrublands of the Pacific Northwest and the Northern Rocky Mountains [51,204]. These communities are common on harsh slopes and in coniferous forests in early succession . In montane regions of Nevada and western Utah, creambush oceanspray occurs in mosaics of mountain meadow and mountain big sagebrush (Artemisia tridentata subsp. vaseyana) stands . In Redwood National Park, California, it occurs in Lewis' mockorange/brittle bladderfern (Philadelphus lewisii/Cystopteris fragilis) and Sierra gooseberry/varileaf phacelia (Ribes roezlii/Phacelia heterophylla) bald-hill communities . On the Jasper Ridge Biological Reserve in coastal northern California, oceanspray is an associated species in chamise (Adenostoma fasciculatum) chaparral communities .
Publications describing plant communities where oceanspray is a dominant or indicator species are listed below.Pacific Northwest:
|Botanical description: This description covers characteristics that may be relevant to fire ecology and is not meant for identification. Keys for identification are available (for example, [97,99,117,193]). Morris and others  provide a key for identifying oceanspray and other shrubs in winter. Oceanspray and rockspirea are distinguished by their forms, leaf characteristics, and distributions ; intergradation of the 2 species is most pronounced in Nevada  and Utah .|
Photo © 2009 Barry Breckling
Form: Oceanspray is a deciduous [1,41,198], spreading shrub with slender arching branches [75,136,223]. It can range from bushy forms about 2.5 feet (0.75 m) tall on poor or frequently disturbed sites to arborescent forms that may be 20 feet (6.1 m) tall in coastal areas. Plants are usually 3 to 10 feet (1-3 m) in height [52,99,198]. They typically have multiple branches . Stem wood is hard and dense ; bark of mature plants is shreddy [41,174]. Stand structures of plant communities where oceanspray is important are discussed in the Stand structure section of Fuels.
Leaves and flowers: The leaves are mostly 1.6 to 2.75 inches (4-7 cm) long and 0.8 to 2.75 inches (2-7 cm) wide [136,223]. Oceanspray has a large leaf area relative to most associated shrubs. In the Siskiyou Mountains of southwestern Oregon, its leaves were more densely packed, larger, thinner, and more prone to wilt than leaves of associated shrub species .
Oceanspray flowers are small, about 2 mm long . They are borne on large, showy, terminal panicles that may reach 12 inches (30 cm) long . The name "oceanspray" is derived from these masses of loose, creamy plumes . The fruit is a 1-seeded  achene [41,97,117], about 2 mm long .
Roots: Rooting depth is likely associated with depth to bedrock. In southwestern Oregon, oceanspray extracted water from no deeper than 3 feet (1 m) below ground, indicating a shallow root system . Dyrness and Franklin  had similar findings in the west-central portion of the Cascade Range in Oregon, where shallow soils confined roots to <3 feet below the soil surface. However, a planting guide for the Pacific Northwest reports oceanspray roots as "deep and wide" , and researchers described oceanspray as "relatively deep-rooted" in the Blue Mountains .
Descriptions of oceanspray's root morphology were not found in the literature as of 2010.
Life span: This species rarely lives more than 30 years . On the Jasper Ridge Biological Reserve, California, its mean life span was 4.5 years .
Physiology: Oceanspray is highly drought tolerant . It has adapted to dry sites and drought by shutting down or slowing its rate of transpiration. In droughty conditions, it apparently uses water less efficiently than associated sclerophyllous species. Its large leaf area, however, may partially compensate for low water transpiration rates in summer. It is likely that oceanspray depletes water in upper soil layers rapidly in summer .
Antieau  suggested that oceanspray may differ in water-use efficiency and cold tolerance across its distribution.Raunkiaer  life form:
Leaf phenology is closely regulated by weather. In the Siskiyou Mountains of Oregon, leaf water conductance peaked in July . On the Jasper Ridge Biological Preserve, mean leaf age was 4.5 months; leaves were drought-deciduous and mostly absent by August . A study in the western redcedar-western hemlock zone of northern Idaho found summer or fall drought initiated leaf color change and leaf drop .
Oceanspray consistently shows a late and long period of flowering throughout its distribution:
|Phenology of oceanspray across its range|
|southern California||flowers June-August |
|northern Idaho||buds swell and burst late March-early April;
leaf-out late March-mid-April ;
stem elongation late March-late June [55,170];
flowers early May-late June;
fruits late June-August [55,174];
leaves change color late June-late September [55,170];
leaves fall late July-late November;
seeds disperse late August-late November 
|Montana||flowers late June-July |
|Nevada||flowers June-August |
|southwestern Oregon||flower buds expand in July;
flowers and fruits July-August 
|Oregon and western Washington||flowers May-July;
seeds disperse August-September (review by )
|Pacific Northwest||flowers midsummer |
|Puget Sound||flowers mid-June |
|Northern Rocky Mountains||flowers mid- to late July;
fruit ripens late August;
seeds disperse late August-late November 
Pollination and breeding system: Insects pollinate oceanspray (review by ). The flowers are perfect .
Antieau  suggested that mountain ranges restrict oceanspray breeding. A study across oceanspray's distribution in Washington and Oregon showed phenotypic differences in oceanspray (for example, in leaf area); these differences were related to geographic regions and climate .
Flower and seed production: Thinning, burning, or other canopy-opening events may increase oceanspray's seed output. In the understories of coast Douglas-fir forests in western Oregon, oceanspray showed a "large increase" in flower and/or fruit production after moderate thinnings (leaving 200 trees/ha) or heavy thinnings (leaving 100 trees/ha or 0.4-ha openings); production increases were "minimal" after light thinning (leaving 300 trees/ha) .
Seed dispersal: Oceanspray seed is disseminated by wind ([213,237,248], review by ) or animals .
Seed banking: Oceanspray has a soil seed bank [60,150]. In western hemlock forests of southwestern British Columbia, viable oceanspray seed was more common in undisturbed soils (x=15.5 germinants/0.04-m² soil sample) compared to clearcut rights-of-way in early-seral succession (x=1-2.5 germinants/0.04-m² soil sample) .
Germination, seedling establishment, and plant growth: Fresh oceanspray seed is dormant . In the field, it likely requires overwintering to germinate. As of 2010, little research had been conducted on oceanspray's germination requirements . Stratification at around 41 oF (5 oC)  for 15 to 18 weeks breaks dormancy in the laboratory [12,113,197].
Oceanspray seed may have low viability. According to a fact sheet, most seeds lack developed embryos, so only about 7% of a given seed lot may be sound .
Seedling establishment is uncommon [140,149,150,208,213] but has been documented a few times. Open stand structure , heat, and bare mineral soil may favor oceanspray germination and establishment (review by ). In the Oregon Coast Range, oceanspray seedlings emerged well (>70%) in both clearcuts and young, unthinned conifer stands; however, seedlings survived only in the young, unthinned stands . Oceanspray established from seed 3 growing seasons after a debris flow on the Central Coast Ranges of southwestern Oregon . See Seedling establishment in the Plant Response to Fire section for studies on postfire seedling establishment.
A review states that oceanspray seedlings grow slowly in their first 2 years of development . Plants released by overstory removal may grow rapidly, however. Daubenmire and Daubenmire  found that in northern Idaho, oceanspray grew up to 15 feet (4.6 m) tall following harvest of the Rocky Mountain Douglas-fir overstory; this was twice its stature in unharvested Rocky Mountain Douglas-fir forests.SITE CHARACTERISTICS:
Oceanspray is common in sands and clay loams (review by ) but may occur in all soil textures. In the Cascade Range of Oregon, coast Douglas-fir/oceanspray communities occur on coarse soils and loams but not on fine soils . A study in the Blue Mountains, however, found oceanspray presence was positively correlated with fine-textured soils (P<0.05) . In western redcedar-western hemlock forests of northern Idaho, oceanspray cover, frequency, and importance value increased as soil organic matter increased; increases in importance values were significant (P=0.05) . Soils supporting oceanspray are often stony [67,87,94,97,98,100], and oceanspray sometimes grows within rock crevices. It is common on talus slopes (review by ). In Nevada and western Utah, oceanspray grew on talus slopes near mountain meadows and in granite boulder piles .
|Oceanspray occurs on a variety of parent materials. In the Cascade Range of Oregon, coast Douglas-fir/creambush oceanspray communities occur on poorly developed basalts, andesites, and other parent materials of volcanic origin . At Oregon Caves National Monument, mixed-conifer forests with oceanspray occur on soils of diorite origin . Poison-oak (Toxicodendron diversilobum)-creambush oceanspray-Mexican elderberry (Sambucus mexicana) communities of San Luis Obispo County, California, are associated with andesite-derived soils .||
Photo © Br. Alfred Brousseau, St Mary's College
Moisture regime: Oceanspray is most common on dry sites. McDonald and others  list oceanspray as an indicator species of dry montane/shrub forests of the Northern Rocky Mountains. Oceanspray is also associated with dry montane forests in British Columbia [168,179] and elsewhere in the Pacific Northwest. It is an indicator species of very dry to moderately dry, nitrogen-medium soils in coastal British Columbia [110,111]; its occurrence decreases with increasing precipitation . It also grows in dry to fresh soils in coniferous forests of interior British Columbia . The western hemlock-coast Douglas-fir/oceanspray association occurs on some of the hottest and driest sites in the Cascade Range of Washington . In the west-central portion of the Cascade Range in Oregon, Dyrness and Franklin  found the coast Douglas-fir/oceanspray association occurs on the dry end of coast Douglas-fir forest types. In an extreme case, oceanspray is "widespread but not abundant" on the Indian Plateau of southwestern Oregon. The plateau is a severe site known for widely fluctuating and extreme temperatures in winter and summer and a record of poor artificial regeneration of conifers .
Oceanspray is also reported from sites with moist to mesic soils. It is frequently associated with riparian communities (review by ). In southeastern Washington and northern Idaho, Pacific ponderosa pine/mallow ninebark-oceanspray communities dry out later in the growing season than Pacific ponderosa pine/common snowberry communities . Oceanspray occurs on moist woodland edges in California  and in moist open woods in British Columbia . In western redcedar-western hemlock forests of northern Idaho, oceanspray frequency was significantly greater on sites with 21% to 25% soil moisture content than on sites with drier or wetter soils .
Aspect and topography: This species is most common on warm, dry, south-facing slopes [67,98,165]. A grand fir/oceanspray association in southwestern Washington is common on exposed, south-facing slopes and on ridgetops. Sites having this association remain snow-free much of the year and experience extreme summer drought . In Douglas-fir (Pseudotsuga menziesii) forests in the Columbia River Gorge of Washington, oceanspray had greatest cover on south-facing slopes (13%) and least cover in mesic ravines (6%) . The coast Douglas-fir/oceanspray association in Oregon's Coast Ranges occurs most often on relatively steep, south- or west-facing slopes between 2,000 and 3,000 feet (600-900 m) elevation. The environment is hot and dry, and the growing season is long, with drought developing by midsummer. Snowpacks are not generally deep or persistent . The western hemlock-Douglas-fir/oceanspray association is found in some of the hottest and driest forests in the western Cascade Range. Sites are "always" upper slopes and fairly steep, and drainage and solar input are "excessive" . Coast Douglas-fir/oceanspray communities in the Cascade Range of Oregon are also most prevalent on dry, south-facing slopes . In western redcedar-western hemlock forests of northern Idaho, oceanspray cover, frequency, and importance values were significantly greater on south- than north-facing slopes (P=0.05) .
Oceanspray grows on more mesic exposures as well. In montane zones on the Umatilla National Forest, it dominated the understory on north, northeast, northwest, and east aspects ; in western Oregon clearcuts it occurred only on north-facing slopes . Oceanspray mostly grows on moist slopes in southern California , where it reaches the southern end of its distribution.
Elevation: Oceanspray occurs from sea level to about 7,000 feet (2,150 m) across its range. It mostly grows on low-elevation montane sites. In western redcedar-western hemlock forests of northern Idaho, oceanspray cover, frequency, and importance values were significantly greater on 3,000- to 3,400-foot (910-1,000 m) elevations than on higher-elevation sites (P=0.05) . Oceanspray grows mostly on high peaks in the Great Basin (review by ).
|eastern Washington and Oregon, Blue Mountains||1,700-4,800 feet |
|Deschutes National Forest, Oregon, east slopes||>2,800 feet, from ponderosa pine to subalpine mixed-conifer zones |
|California||<5,900 feet |
|southern California||<4,500 feet |
|Nevada||4,500-9,500 feet |
|Pacific Northwest||sea level to 5,500 feet |
Climate: Oceanspray occurs mostly in dry zones , although it is characterized as a "predominantly humid zone species" in western Washington . Annual precipitation across its United States distribution [37,56,97,137,215,241] ranges from 9.3 inches (236 mm) in central Oregon  to 57 inches (1,140 mm) in western Washington .SUCCESSIONAL STATUS:
Seral occurrence: Disturbance favors oceanspray [111,113]. Kruckeberg  characterized oceanspray as a "colorful reclaimer of open or disturbed lands" of the Pacific Northwest, where it commonly establishes on recently logged sites, in second growth, and on roadbanks. It is especially common in seral Douglas-fir forests . Following the Sundance Fire in northern Idaho, oceanspray was important or codominant in the first decade of postfire succession in Rocky Mountain Douglas-fir-western hemlock forests . On another site in northern Idaho, oceanspray grew rapidly and dominated early-seral sites after a Rocky Mountain Douglas-fir forest was clearcut. The shrub layer regained precutting cover about 60 to 80 years after tree harvest . Oceanspray seedlings established 3 growing seasons after a debris flow on the Central Coast Ranges of southwestern Oregon .
Oceanspray prefers open sites [111,218]. It is described as a "light demanding, early successional" species . Logging and fire promote oceanspray by opening the canopy. A study at the Eastern Oregon Experiment Station showed shrub cover, including that of oceanspray, decreased with increasing cover of the mixed-conifer overstory. At about 90% canopy closure, shrub cover dropped to about 5%. However, even under a nearly closed canopy, a few shrubs remained alive in the understory, and seedlings of these shrubs established in canopy breaks . In coast Douglas-fir/salal stands on foothills of the Cascade Range, Washington, maximum oceanspray cover occurred approximately 20 years after disturbance (clearcutting or wildfire); oceanspray generally declined after that :
|Oceanspray cover in different-aged Douglas-fir stands in Washington |
|Disturbance and stand age||Postclearcut year 5||Postfire year 22||Postfire year 30||Postfire year 42||Postfire year 73|
Defoliation and/or death of overstory trees due to insects may favor oceanspray. In the Blue Mountains, oceanspray showed 5% cover and 15% frequency 23 years after a record-breaking, 2-year attack by Douglas-fir tussock moths. About 1,250 miles² (3,240 km²) of a grand fir-Douglas-fir forest was affected by the outbreak .
Where it is a minor species, oceanspray may not decline with canopy closure. In western redcedar-western hemlock forests of northern Idaho, its cover, frequency, and importance values were not significantly different in 5 canopy-cover classes ranging from 1% to 100% closure. Oceanspray had ≤1% cover in all canopy-cover classes. Similarly, its cover, frequency, and importance values in these forests were not significantly different between logged, logged-and-burned, single-broadcast-burned, or multiple-broadcast-burned sites and sites with no history of logging or prescribed fire .
Logging: Lightly-shaded areas, such as those occurring a few decades after thinning, can promote oceanspray growth . In Douglas fir-western hemlock forests of coastal Oregon, oceanspray was associated with intermediate tree densities (P<=0.01) . In Douglas- fir stands in northern Idaho, its cover peaked about 20 years after logging .
|Oceanspray cover in unlogged and logged Douglas-fir stands in northern Idaho |
|Treatment||Unlogged||Logged 13 years previous||Logged 20 years previous||Logged 40+ years previous|
On the Fort Lewis Military Reservation of Washington, a late 1990s study found oceanspray cover was greater in a coast Douglas-fir/oceanspray forest that had been clearcut in the 1920s and thinned twice afterwards (2.5% oceanspray cover) than in a coast Douglas-fir/oceanspray forest that had been partially cut only once, in the 1930s (1.5% oceanspray cover) . In Pacific ponderosa pine and Rocky Mountain Douglas-fir habitat types of the Swan Valley, Montana, oceanspray cover was greater on clearcut (15%) and plantation (10%) plots than on untreated plots (8%) .
In the Klamath Mountains of Oregon and California, shrubfields of oceanspray and other sprouting shrubs develop after logging or fire when conifers fail to regenerate in the early postfire community; conifers eventually replace the shrubs on most sites .
Logging does not favor oceanspray on all sites. In northern Idaho logging reduced oceanspray frequency slightly compared to its frequency in the understory of an adjacent unlogged site. The study site was in a western hemlock/pachistima forest. A tall-shrub (>3 feet (1 m)) community developed after logging; oceanspray was a component of this early-seral, tall-shrub community. On cut sites, oceanspray had 1.4% frequency 7 years after logging and 0.7% frequency 25 years after logging. It had 2.1% cover on the unlogged site 25 years after treatments .
See Plant response to fire for more information on oceanspray occurrence in seral postfire communities.Late-successional occurrence: Oceanspray sometimes occurs in late succession. In Glacier Park's western redcedar-western hemlock forests, it is mostly restricted to late-seral or climax communities . Oceanspray also occurs in late succession in western redcedar-western hemlock and grand fir forests of Montana , and it is a late-successional or climax species in some western hemlock habitat types of Washington  and northern Idaho . However, Henderson and others  point out that on the Olympic National Forest, climax western hemlock/salal-oceanspray forests rarely develop due to recurrent fires. Coast Douglas-fir dominates the seral stands; oceanspray often codominates the understory of these seral stands . Oceanspray also dominates the understories of late-successional Douglas-fir forests in Oregon  and Montana . In mixed-conifer forests of western Oregon and California, oceanspray and other deciduous shrubs are more likely to dominate in late succession on north-facing and other mesic slopes than on south-facing, dry slopes .
Immediate fire effect on plant: Oceanspray is usually top-killed by fire [25,35,60,140,167,167,203,207,207,253]. Many fire researchers describe it as "moderately resistant" to fire [60,61,207,248]. Stickney  classifies oceanspray among the shrubs "least susceptible" to fire mortality, although fire may kill some individuals within a population .
Postfire regeneration strategy :
Tall shrub, sprouting root crown
Small shrub, sprouting root crown
Ground residual colonizer (on site, initial community)
Initial off-site colonizer (off site, initial community)
Secondary colonizer (on- or off-site seed sources)
Fire adaptations and plant response to fire:
Fire adaptations: Oceanspray sprouts from the root crown after fire [55,60,61,140,167,208,209,228,232,245]. Stickney [207,208] uses oceanspray as a characteristic example of a root crown-sprouting, "postfire survivor species".
Oceanspray may establish from soil-stored seed [25,60,160,167,207,232,248], although seedlign establishment is apparently rare [167,248] and to date (2010), has only been documented 3 times after fire [83,160,191]. Postfire seed dispersal onto burns by wind or animals is possible but has not been documented. Heat and bare mineral soil may favor oceanspray germination and establishment (review by ); this has not been determined experimentally or in the field.
Plant response to fire: Oceanspray sprouts from the root crown and establishes from seed after fire.
Sprouting from surviving root crowns is oceanspray's most common method of postfire regeneration [25,25,35,42,54,58,108,126,134,167,167,206,207,208,208,232,245,248,248]. It usually takes 5 to 10 years for oceanspray to recover its prefire abundance . It is often important on early-seral shrubfields after fire; these shrubfields eventually succeed to coniferous forests . Shatford and others  found oceanspray "common and abundant" on 9- to 19-year-old burns in dry coast Douglas-fir forests of the Siskiyou and Klamath mountains of Oregon and California. Oceanspray's cover generally increases after disturbances [25,35,167,248] that open the canopy in late-successional forests, so oceanspray is likely to increase on sites that were in late succession before fire [42,60,61,167,248].
Sprouting allows oceanspray to survive large, severe wildfires. In southeastern Oregon, oceanspray was noted in montane postfire communities after the 2002 Biscuit Fire Complex, a series of mixed-severity (low- to high-severity surface and crown) wildfires that burned about 500,000 acres (200,000 ha), and after the Bear Butte and Booth Fire Complex, a series of mixed-severity wildfires that burned about 91,000 acres (37,000 ha) . A survey of wildfire-burned sites in California chaparral and moist and dry, mixed-conifer forests of western Montana showed oceanspray sprouted after fires of all severities in all vegetation types where it was present before fire. Its postfire sprouting response was stronger in moist and dry conifer forests than in chaparral . Reburns generally favor oceanspray (see Northern Idaho below).
Seedling establishment: Oceanspray regenerates from soil-stored seed after fire  occasionally. Neuenschwander  noted that for oceanspray, "reproduction from seed is rarely observed after a burn", and Stickney (1978 personal communication cited in ) noted that oceanspray seedling growth is slow in burns compared to other species. However, in the western Cascade Range of Oregon, oceanspray seedlings occurred 2 years after former western-hemlock/Douglas-fir old growth had been clearcut, broadcast burned, and planted to coast Douglas-fir. Oceanspray was not present on study plots before treatments .
Although oceanspray does not often establish from seed, its postfire seedling cover may be greatest where fire was severe. A northern Idaho study determined that oceanspray regenerated from duff- and soil-stored seed 1 to 3 years after broadcast burning in western redcedar/queencup beadlily (Clintonia uniflora) habitat types. Greatest oceanspray seedling cover was in areas that experienced severe fire . Succession proceeded slowly after the severe 1960 Saddle Mountain Fire in the Saddle Mountain Wilderness, Arizona, where oceanspray is near its southern distributional limit. Oceanspray showed low cover (0.03%) and frequency (0.01 %) in a vegetation survey conducted in postfire year 48 .Regional studies: Oceanspray is most common in early postfire succession , with cover and frequency declining with advancing stand age. Studies from the following regions provide site- and habitat-specific examples of oceanspray's postfire response, as well as information on combining spraying with prescribed burning for shrub control, reburning, and interactions between prescribed fire and browsing.
Oceanspray showed good recovery after prescribed-burning and thinning-and-burning treatments in the Pacific Northwest. Herbicides-and-burning treatments helped control oceanspray.
Washington: In a short-term study, oceanspray gained cover rapidly between postfire years 2 and 3 following a July 1970 wildfire in North Cascades National Park. The wildfire burned a coast Douglas-fir-western hemlock stand on a ridgetop .
|Oceanspray abundance after the 1970 Silver Creek Wildfire in North Cascades National Park |
|Year||Cover (%)||Frequency (%)|
|1971 (postfire year 1)||3.2||<0.05|
|1972 (postfire year 2)||3.2||<0.05|
|1973 (postfire year 3)||16.1||1.1|
Near Wenatchee, oceanspray was abundant a year after thinning and prescribed fire in a Pacific ponderosa pine/white spirea (Spiraea betulifolia) forest. Burning was conducted on 22 September 1997; the fire was of low severity, with flame lengths generally <4.9 feet (1.5 m). Seventy-eight percent of oceanspray plants sprouted in postfire year 1. Ocean spray density was 15 plants/ha in postfire year 1; 337 plants/ha in postfire year 3; and 238 plants/ha in postfire year 9. The management objectives—to reduce fuels and conifer seedling density and to help restore approximate historical stand structure and composition—were considered met .
Oceanspray had regained its "former size and luxuriance" 10 years after slash burning in a Pacific ponderosa pine/mallow ninebark habitat type in northeastern Washington .
Spraying and prescribed burning for shrub control: In the central Oregon coast, an herbicides-and-fire treatment helped control oceanspray in the short term. A shrubfield on a heavily logged Sitka spruce (Picea sitchensis)-western hemlock habitat type was treated with either herbicides (picloram-phenoxy mix), herbicides followed by October prescribed fire, herbicides followed by tractor crushing, or bulldozer scarification without herbicides or fire. The objective was to reduced shrub interference with conifer seedlings. For sprayed plots, herbicide was applied in summer or early fall; any additional treatments were done in fall. Treatments employing mechanical disturbance were most effective, and spraying alone least effective, at controlling oceanspray. The author attributed the only moderate control obtained from the herbicides-and-fire treatment to recent rains and poor combustion of fuels .
|Mean oceanspray frequency (%) a year after shrub-control treatments on an Oregon shrubfield |
|Herbicides + Rx fire||9||3|
|Herbicides + crushing||31||0|
Although herbicides and crushing best controlled oceanspray in particular, scarification controlled shrubs in general better than other treatments .
Southern California: Prescribed burning had little or no effect on oceanspray in a mixed-conifer Jeffrey pine-California black oak woodland with a chaparral understory in Cuyamaca Rancho State Park, San Diego County. In postfire year 2, oceanspray was present in trace amounts (4 plants/ha) on unburned control plots but was not present on burned plots . See the Research Project Summary of Martin and Lathrop's [124,143,144] study for details of the fire weather, fire prescription, and fire's effects on 38 other plants in the woodland.
Northern Rocky Mountains:
In the Northern Rocky Mountains, prescribed fires had either no effect or a positive effect on oceanspray. Oceanspray had a strong postfire recovery after a wildfire. Prescribed and wildfire reburns promoted oceanspray and other shrubs over conifers. Postfire ungulate browsing of oceanspray was minimal.
Western Montana: Thinning and/or prescribed fire had little effect on oceanspray in Pacific ponderosa pine and Rocky Mountain Douglas-fir forests on the Lubrecht Experimental Forest. Oceanspray was scarce in these forests; it had <1% cover and frequency before treatments and in posttreatment year 2. The treatments successfully reduced fuel loads and helped restore historical stand structure in these forests. See Metlen and others' Research Project Summary for information on fire and thinning prescriptions used in this study, on fire behavior, and on the effects of thinning-alone and/or thinning-and-burning treatments on 7 tree, 24 shrub, 37 graminoid, 1 fern, and 540 forb species.
Northern Idaho: In Rocky Mountain Douglas-fir/mallow ninebark habitat types on the Coeur d'Alene Reservation, mean oceanspray across 3 postfire years cover did not differ significantly on unburned control sites, sites burned at low intensity (127 Kcal/m-s), or sites burned at high intensity (781 Kcal/m-s). For information on the fire weather, fire prescription, and postfire responses of 14 other shrub, 9 perennial graminoid, 25 perennial forb, and 6 annual species, see the Research Project Summary of Armour and others'  study.
Oceanspray showed mixed but mostly favorable responses after prescribed fires on the Clearwater National Forest . Prefire abundance and season of burning were not given.
|Oceanspray abundance in the summer of 1969, after prescribed fires on the Clearwater National Forest, northern Idaho |
|Site* (year of fire)||Frequency (%)||Density (plants/acre)|
|Lone Knob fire (1969)||56||219|
|Lone Knob control||12||53|
|Fish Creek fire (1968)||32||101|
|Fish Creek control||20||158|
|Bee Creek fire (1967)||4||28|
|Bee Creek control||44||101|
|Relay Station fire (1968)||8||24|
|Relay Station control||16||117|
|*Relay Station is near Avery; all other sites are on the Lochsa Watershed.|
Oceanspray grew rapidly after prescribed fires in seral shrubfields in a grand fir/pachistima (Pachistima myrsinites) habitat type on the Coeur d’Alene National Forest. Its sprouts were approximately 24 inches (60 cm) tall by the end of the 1st postfire growing season. Spring-burned oceanspray sprouted during postfire weeks 4 to 8; plants burned in fall did not sprout until the next spring. Unlike many associated shrubs that sprouted most prolifically following spring prescribed fire, oceanspray showed greatest shoot production following fall prescribed fire .
Ten years after the mixed-severity Sundance Fire, Stickney  reported 5% to 11% cover of oceanspray; it was one of the principal cover species on his plots. Study plots were in a western hemlock habitat type. Oceanspray was a component of the initial "sprouting shrub stage" that formed a year after the fire and persisted through at least 10 years of postfire succession .
Reburning: Reburns generally promote oceanspray and other sprouting shrubs over conifers. In conifer forests on the Coeur d’Alene National Forest, oceanspray was a component of mixed-species shrubfields after wildfires 19, 21, and 9 years apart (initial fire in 1851, reburns in 1870, 1910, and 1919). The shrubs were dense and well developed 10 years after the 1919 wildfire .
Oceanspray sprouted and grew rapidly after a March 1965 prescribed fire in a grand fir/Oregon boxwood (Paxistima myrsinites) habitat type in the Fish Creek area of the Nez Perce National Forest. Prior to the prescribed fire, the overstory had been killed by wildfires in 1934 and in 1954; a shrubfield developed after these fires. The fire management objective was to maintain the shrubfield as big game browse [131,132].
|Oceanspray response to spring prescribed fire in a grand fir/Oregon boxwood habitat type in northern Idaho [131,132]|
|Live crown diameter (feet)||Live crown height (feet)||Basal sprouts/plant||Sprout height (feet)|
|prefire (March 1965)||5.3||8.6||2.7||1.0|
|postfire month 5 (August 1965)||2.8||3.6||33.4||2.6|
The fire successfully rejuvenated the shrubfield. See the 2nd Fire Case Study in Saskatoon serviceberry for details on the prescription and behavior of this prescribed fire.
Prescribed fire and postfire browsing: Since oceanspray is relatively unpalatable, it is unlikely to be overbrowsed after fire. Ungulates browse new oceanspray sprouts, but browsing pressure usually declines rapidly after postfire year 1. On the Sherman Creek Watershed in northern Idaho, elk browsed new oceanspray sprouts but did not consume unburned plants or sprouts ≥3 years old. Prescribed burning was conducted in the spring or fall of 1966 to enhance winter browse for big game species, so fall-burned plants did not provide forage until the next growing season (1968). Oceanspray was not utilized in postfire years 6 or 8 on either burned or unburned plots; overall, elk use of oceanspray was the least of 8 browse species. Diameter of oceanspray twigs that sprouted after fire was thicker than that of twigs of unburned plants for at least 2 postfire years :
|Percent of oceanspray twigs that elk browsed and oceanspray twig diameters on prescription-burned and unburned control plots on the Sherman Creek Watershed, northern Idaho. Data are means .|
|Browsed (%)||Twig diameter (mm)||Browsed (%)||Twig diameter (mm)||Browsed (%)||Twig diameter (mm)|
|fall-burned, 1966||no new growth||no new growth||12.1||2.4**||0||2.13|
|*Different from control at P=0.01.
**Different from control at P=0.05.
Prescribed fire and cattle-grazing treatments had no significant effect on oceanspray cover in a Rocky Mountain Douglas-fir/mallow ninebark habitat type on the Idaho Experimental Forest .
|Oceanspray density (and cover) 1 year after prescribed fire and grazing in a Douglas-fir/mallow ninebark habitat type in northern Idaho |
|Grazed||1,267 plants/ha (1.1%)||500 plants/ha (0.6%)|
|Ungrazed||833 plants/ha (1.0%)||600 plants/ha (2.2%)|
See Palatability for more information on ungulate use of oceanspray after fire.FUELS AND FIRE REGIMES:
Photo by J. E. (Jed) and Bonnie McClellan © California Academy of Sciences
Fuels: Oceanspray is most frequent on south slopes of dry montane forests (see Site Characteristics); these sites typically burn earlier in the season or with higher severities than cooler, drier sites. In northern Idaho, Smith and Fischer  placed the Pacific ponderosa pine, Rocky Mountain Douglas-fir, and grand fir forests where oceanspray is most typically dominant in Fire Group 2. These forests tend to have warm temperature regimes, dry to moderate soil moisture, and are generally more productive—with heavier loads of downed woody fuels—compared to cooler or drier forests. Oceanspray also occurs in mesic to moist grand fir forests (Fire Group 7); these forests also have heavy fuel loads. See Smith and Fischer  for fuel load measurements representative of coniferous forest habitat types where oceanspray is important in northern Idaho.
In Pacific ponderosa pine-grand fir forests of Washington and Oregon, growing-season moisture content of shrubs, including oceanspray, averaged >125% over 2 years. Shrub moisture content peaked in June at ~175%. Moisture contents of dominant overstory trees are also described in this study .
In many forest types with oceanspray, fire exclusion has resulted in higher loads of woody debris compared to woody fuel loads when historic fire regimes were still functioning. In white fir stands in the Siskiyou Mountains of southwestern Oregon, large woody-debris loads were positively correlated with time-since-fire (P=0.01). Snag density was positively correlated with low (30 snags/ha) and high (23 snags/ha) fire severities (P=0.05). The authors attributed the correlation to nonconsumption of preexisting snags at low fire severity and creation of new snags at high severity. In this study, oceanspray dominated the shrub layer of white fir stands in dry, interior valleys .
Stand structure: Stand structure of communities where oceanspray is an important component of the vegetation is variable, as is the amount of fuel oceanspray contributes. On some sites, structure is open, with a sparse shrub component. In the west-central portion of the Cascade Range of Oregon, the coast Douglas-fir/oceanspray association displayed a relatively open stand structure (30-60% crown closure) of old growth, with few shrubs and a "very poorly developed" herb layer. Oceanspray cover averaged 5% . Another study of coast Douglas-fir/oceanspray communities in the Cascade Range found that except for oceanspray, the tall-shrub layer was depauperate; low-shrub and herbaceous cover was also low. Incense-cedar, however, was encroaching in the subcanopy. Tree densities averaged 53 stems/ha for coast Douglas-fir and 5/ha for incense-cedar . Live shrubs, including oceanspray as a dominant, comprised <5% of total stand biomass in mixed-conifer communities in the White Cap Wilderness Study Area of northern Idaho. Total shrub fuel loads ranged from 204 to 2,190 lbs/acre; shrubs were 0.6 inch to 27 inches (1.5-69 cm) tall, with 2% to 50% cover .
Some communities with oceanspray have denser overstories and/or understories. A coast Douglas-fir/oceanspray stand on the west-central portion of the Cascade Range, Oregon, had 70% tree cover, 46% shrub cover, and 36% herb cover. Aspect of the forest was southwest; it was the hottest and driest of 18 stand types examined . Bailey  found coast Douglas-fir/oceanspray-salal habitat types off the southern coast of Oregon had relatively open canopies and "well-developed" shrub layers. Oceanspray averaged 30% cover . Western redcedar-western hemlock forests often have a dense overstory, but understory cover of oceanspray and other shrubs may be sparse .
Mixed-conifer forests of southern Oregon and California are structurally and compositionally complex, with small conifers—often white fir and/or incense-cedar—often forming ladder fuels in a well-developed subcanopy. Snags and large, downed woody debris are common, but fuel loads are highly variable. Many of these mixed-conifer forests support a moderate to dense shrub understory, although some have few shrubs but a dominant herbaceous layer, and others have both depauperate understory and ground layers . Stand structure in California's mixed-conifer forests was mostly open in the presettlement period .
Insect attacks increase snag densities in oceanspray habitats, which eventually increase dead and downed woody fuel loads. Youngblood and Wickman  provide data on stand structure, live and dead tree abundance, and shrub and herb cover of a grand fir-Douglas-fir forest attacked by Douglas-fir tussock moths 23 years prior. Oceanspray was an important component of the understory (5% cover); the site was in the Wenaha-Tucannon Wilderness in the Blue Mountains of Washington and Oregon .
Models: A few models were available for predicting oceanspray's contribution to total fuel loads as of 2010. Smith and Brand  review equations for predicting oceanspray biomass. Harris  presents models to predict oceanspray aboveground biomass and cover; the models were developed from data collected in coast Douglas-fir, grand fir, and western larch forests on the Umatilla National Forest. Brown  provides a model for predicting total aboveground oceanspray biomass and total leaf biomass based on basal stem diameter. Samples on which the model is based were collected in northern Idaho and western Montana .
Leaf area indices are used in some fuel models . In the Siskiyou Mountains of southwestern Oregon, oceanspray had a large mean leaf area compared to associated shrubs; about twice as large as the leaf areas of associated greenleaf manzanita (Arctostaphylos patula) and redstem ceanothus (Ceanothus sanguineus) . Agee and Lolley  placed oceanspray in fuel type 2: shrubs with thick stems but thin leaves.
Fire regimes: Plant communities with oceanspray display a wide range of fire regimes. Oceanspray is most often dominant in dry Douglas-fir forests but is also common in dry ponderosa pine (Pinus ponderosa) and mesic western redcedar-western hemlock forests. Historical fire regimes of these coniferous forests are a continuum from mostly frequent, low-severity surface fires for ponderosa pine; to mixed surface and crown fires for Douglas-fir; to mostly long return-interval, crown fires for western redcedar-western hemlock types. Oceanspray also occurs in less widely distributed conifer and nonconifer types that historically experienced a similarly wide range of fire regimes. These types include Port-Orford-cedar, redwood, and knobcone pine coniferous communities and Oregon white oak and chaparral communities. See Habitat Types and Plant Communities for details on communities with oceanspray.
Douglas-fir: Douglas-fir forests with oceanspray experience low- to moderate-severity surface, stand-replacement surface, and crown fires (review by ). Because Douglas-fir forests with a large component of oceanspray occur mainly at low elevations, human-ignited fires can be frequent . A study in the Cascade Range of Oregon found the ages of coast Douglas-fir/oceanspray stands that established after major fires (those killing ≥50% of the overstory) ranged from 75 to 450 years. Mean return intervals of major fires ranged from 72 years for the coast Douglas-fir/oceanspray/Indian's-dream (Aspidotis densa) phase of the coast Douglas-fir/oceanspray/grass type to 111 years for the coast Douglas-fir/oceanspray/vine maple type. The coast Douglas-fir/oceanspray/Indian's-dream phase is the driest phase of the coast Douglas-fir/oceanspray/grass type; the coast Douglas-fir/oceanspray/vine maple type occurs on ridges that may burn less frequently than other coast Douglas-fir/oceanspray types .
|Fire regime data for Douglas-fir/oceanspray communities in the Cascade Range, Oregon |
|Plant community||Douglas-fir/oceanspray/grass type,
manyleaf collomia (Collomia heterophylla) phase*
|Douglas-fir/oceanspray/vine maple type|
|Number of plots||4||19||12|
|Number of fire intervals||6||12||11|
|Mean stand age (SD); range||196 (104); 94-330||198 (84); 75-337||294 (151); 89-450|
|Mean time since last major fire (SD); range||128 (52); 82-197||133 (51); 63-266||162 (89); 89-420|
|Mean interval between stand-replacement fires (SD); range||72 (41); 26-131||107 (65); 34-217||111 (68); 41-232|
|Plots experiencing a major fire since initiation of last cohort (%)||50||47||48|
|Plots burned since initiation of oldest cohort (%)||75||58||61|
|*The most common phase of the Douglas-fir/oceanspray/grass type.|
Chappell and Giglio  found fire was the major natural disturbance in coast Douglas-fir-Pacific madrone/oceanspray associations near the Puget Trough of Washington. Their study of over 50 coast Douglas-fir-Pacific madrone sites across west-central Washington found all sites had experienced fire at least once in 130 years . Agee  reported a fire regime of mostly mixed moderate-severity surface and crown fires—with some low-severity surface fires—for coast Douglas-fir-Pacific madrone forests in the area.
Weisburg  found coast Douglas-fir forests in the west-central portion of the Cascade Range of Oregon showed a mean fire-return interval of 97 years from 1475 to 1996; the mean interval was 197 years when low-severity fires were excluded. Low- to moderate-severity fires averaged 58% of all fires. Basal area of understory shrubs, which included oceanspray, decreased with time since fire (R²=0.51) .
Ponderosa pine: Ponderosa pine communities historically experienced mostly low-severity surface fires (for example, [16,82]). Pacific ponderosa pine forests of the Blue Mountains of Washington and Oregon had mostly low-severity surface fires averaging every 6 to 22 years (review by ). This fire regime favored oceanspray; Wright  characterized oceanspray and other shrubs in these communities as "vigorous sprouters and very tolerant of fire". Very frequent fire-return intervals (<5 years), however, resulted in greater cover of bluebunch wheatgrass and other bunchgrasses than cover of shrubs . Pacific ponderosa pine forests of northern Idaho and western Montana historically experienced similar fire behavior and fire-return intervals. Rocky Mountain Douglas-fir generally becomes dominant in these forests with fire exclusion (review by ).
Western redcedar-western hemlock: Historical fire regimes in this type were variable; some stands experienced fire only rarely but others burned at moderate intervals. Stand-replacement fires are more common in this type than understory fires. Seral forests—where oceanspray is most likely to occur—historically burned about every 50 to 100 years, usually with surface or mixed surface and crown fires. Surface fires in seral western redcedar-western hemlock forests may affect the composition of understory shrubs such as oceanspray but typically have little effect on overstory composition. Western redcedar-western hemlock forests of northern Idaho, in which oceanspray is prevalent, are typically cooler and damper than most conifer types, with a sparse understory, deep duff, and moist large woody fuels. The fire-return interval ranges from 25 to >500 years for these forests (review by ).
Port-Orford-cedar: Port-Orford-cedar forests experience mixed-severity and stand-replacement fires at short to long intervals. Port-Orford-cedar is somewhat unusual in that it persists from early-seral to climax stages of postfire succession . Oceanspray is unlikely to persist in closed-canopy, old-growth Port-Orford-cedar (see Successional Status), but may persist in seral Port-Orford-cedar communities.
Redwood: These forests historically experienced short to long fire-return intervals [76,119], with surface fires at short to moderate intervals (10-100 years) most common . Oceanspray is unlikely to persist in closed-canopy, old-growth redwood forests (see Successional Status) but may persist in seral communities.
Mixed-conifer forests of Oregon and California: These mixed-conifer forests historically had a regime of mostly low-severity surface fires on the hot, dry sites  where oceanspray is most likely to occur (see Site Characteristics). Fire-return intervals varied from about 10 to 80 years (review by ). A study in the Klamath Mountains of California found that fires in mixed-conifer forests with oceanspray were historically mostly small and of mixed severity. Fire activity declined in the 1950s, with the advent of fire exclusion . Sierra Nevada lodgepole pine-white fir communities in Emigrant Basin Wilderness Area, California, historically had fire-return intervals averaging 57 years .
Oregon white oak: Oregon white oak communities historically had short- to moderate-interval surface fires. White and others  report that Oregon white oak in Oregon's Klamath Mountains experienced fire every 3 to 20 years. A fire history study of Oregon white oak-coast Douglas-fir mosaics of Vancouver Island, British Columbia, found that prior to European settlement, the island experienced mostly low-severity surface fires. Native Americans apparently burned these mosaics several times/decade, so fire-caused mortality of overstory trees was negligible. These intervals were much shorter  than the 50- to 100-year intervals Agee  estimated for coast Douglas-fir forests on the adjacent mainland.
Knobcone pine and chaparral: Some communities where oceanspray is important experience frequent crown fires. Knobcone pine communities of southern Oregon and coastal California require frequent (<60-year intervals) , stand-replacement fires to maintain knobcone pine as the community dominant [39,230]. Likewise, chamise communities of southern Oregon and California require stand-replacement fires at <60-year intervals to maintain chamise as the community dominant .
Other shrublands: In Redwood National Park the bald-hill shrubland communities, of which oceanspray is an important component, were historically maintained by very frequent fire. Native Americans may have burned the bald hills at least every other year. Fire scars on Oregon white oaks adjacent to the hills show fire-return intervals of about 2 years; 10 years was the maximum time between fires that left scars. Coast Douglas-fir seedlings are encroaching on the hills with fire exclusion; the former shrubby balds will likely succeed to redwood/Douglas-fir forests without the return of very frequent fire .
See the Fire Regime Table for further information on fire regimes of vegetation communities in which oceanspray may occur. Find further fire regime information for the plant communities in which this species may occur by entering the species name in the FEIS home page under "Find Fire Regimes".FIRE MANAGEMENT CONSIDERATIONS:
|Importance of oceanspray as browse for wild ungulates in British Columbian |
|Ungulate||Importance as Browse|
|Sitka black-tailed deer||moderate|
|Rocky mountain elk||low|
However, because this species is common and readily available to wildlife and livestock on low-elevation rangelands, ungulates may make light but frequent use of oceanspray in summer [161,226]. Cattle use it as summer forage in northern Idaho [35,217] and northeastern Oregon .
Wildlife [125,161] and livestock  sometimes browse oceanspray more heavily [36,62,115], especially in late fall and winter when green forage is less available [125,197]. Snowshoe hares in the Flathead region of western Montana use the leaves and twigs for fall forage . Studies on the Bitterroot National Forest and in the Rattlesnake Creek drainage of western Montana found elk, mule deer, and white-tailed deer preferred oceanspray as winter forage [109,146]. Columbian black-tailed deer in western Oregon browse oceanspray twigs in winter ; mule deer on the Los Padres National Forest of southern California also use oceanspray . Oceanspray is heavily utilized by migrating mule deer and elk in central Washington .
Green clippings of oceanspray were found in dusky-footed woodrat shelters in Oregon , and the shrub is apparently palatable to native slugs in western Washington .
Palatability and/or nutritional value: Oceanspray is usually unpalatable to ungulates [157,158] and other browsing animals. A review rated its palatability as poor to fair for cattle and fair for domestic sheep . A study on the Tillamook Burn of northwestern Oregon found mountain beavers browsed oceanspray less than expected based on availability . New postfire sprouts are most palatable ([18,166], review by ). On burned sites in northern Idaho, big game species in northern Idaho preferred browsing sprouts of oceanspray and other shrubs to browsing current-year growth of shrubs on adjacent unburned sites, especially the first growing season after fire . On one site, elk utilization of oceanspray increased from 1.3% before fire to 36.3% a year after prescribed fire; elk use dropped to 6.9% in postfire year 2 . Asherin  also noted that big game species browsed oceanspray readily in postfire year 1, but use dropped after that. Browsing ungulates may pass over oceanspray sprouts if more palatable shrubs are available. On a wildfire-burned Rocky Mountain Douglas-fir/mallow ninebark habitat type on upper Selway River, northern Idaho, mule deer browsed oceanspray "minimally" in postfire years 2 and 3, while western serviceberry and Scouler willow were used heavily . Following prescribed fires on the Lochsa Watershed in northern Idaho, elk preferred Scouler willow, western serviceberry, and Rocky Mountain maple sprouts to those of oceanspray .
Habitat: Conifer/oceanspray communities provide important habitat to a variety of wildlife species. Along the Umatilla River of Oregon, white-tailed deer used Pacific ponderosa pine-coast Douglas-fir/oceanspray and Pacific ponderosa pine/oceanspray communities more than expected based on availability (P<0.0001) . On sky islands across Nevada and in western Utah, yellow-bellied marmot burrows were closely associated with oceanspray, "almost without exception" [64,65]. In the central Oregon Coast Ranges, oceanspray was found on streamside and upslope habitats where 18 of 22 small mammal species and 9 of 13 amphibian species known to the area were captured . This shrub is also common in northern Idaho Pacific treefrog habitats .
Cover value: Oceanspray provides cover for a variety of species. Blue grouse hide beneath oceanspray and other shrubs . Dense shrub understories in Rocky Mountain Douglas-fir/mallow ninebark habitat types—where oceanspray is common to codominant—provide visual and thermal cover for deer and elk; in addition, these sites supply nesting habitat, cover, and food for a variety of nongame birds and mammals .
VALUE FOR REHABILITATION OF DISTURBED SITES:
Oceanspray could potentially be used on Burned Area Recovery sites, although to date (2010), there was no documentation of its suvivorship after transplanting onto burns. It is used successfully for erosion control (, review by ), highway plantings, windbreaks, riparian plantings, and wildlife plantings (reviews by [196,197]). It establishes readily through natural regeneration on burned sites [35,246] (see Successional Status and Plant response to fire). In northern Idaho, for example, oceanspray dominated (48% of total understory cover) a Pacific ponderosa pine-Rocky Mountain Douglas-fir stand in early postfire succession; its size (10-15 feet (3-4.6 m)) and relative unpalatability allowed it to compete successfully with other shrubs for light, moisture, and space. Because it is a "poor forage species", researchers predicted it would dominate the burn until crowded out by conifers .
Oceanspray is propagated from cuttings or seed [12,113], with cuttings the usual method. A 2004 review found oceanspray seeds were "rare and costly" , and as of 2008, there were no published guidelines for growing this species from seed . See these sources: (, reviews by [196,197]) for information on propagating oceanspray. Plants are available commercially .OTHER USES:
Traditional uses: Native Americans used oceanspray for making implements, as medicine , and sometimes as food. The long, straight, hard branchwood was highly prized for making arrow shafts [50,224], as well as digging sticks, fishing hooks, and needles [73,224]. Native Americans used oceanspray for treating viral and skin diseases (, review by ) and as a tonic . The bark and leaves were dried and pulverized for application to burns or sores . The Pima made tea from the leaves , and Native Americans in the Inland Northwest ate the seeds .OTHER MANAGEMENT CONSIDERATIONS:
Grazing: Oceanspray may decline with grazing despite its relative unpalatibility; its growth response in browsing and clipping studies has been mixed. In northern Idaho sites with elk, moose, mule deer, and white-tailed deer, oceanspray was more common inside than outside exclosures . Another northern Idaho study in a Douglas-fir habitat type found oceanspray decreased in cattle-grazed stands . Similarly, in the Bitterroot Mountains of northern Idaho, oceanspray showed greater density, cover, and frequency on ungrazed plots than on plots grazed by cattle (989 vs. 522 plants/ha; 2.6% vs. 0.6%; 4.4% vs. 1.3%, respectively, for desnity, cover, and frequency) . Garrison  recommends ≤50% to 60% utilization of oceanspray to prevent the species' decline.
Daubenmire and Daubenmire  reported that in eastern Washington and northern Idaho, overgrazing of Pacific ponderosa pine/mallow ninebark stands, in which oceanspray often codominates, may result in a disclimax ponderosa pine/bluegrass (Poa spp.) community.Exclosure studies in eastern Washington and eastern Oregon found that oceanspray production was significantly greater (P≤0.04) for completely clipped plants (100% of new growth removed, x=200 g/0.25 acre) compared with heavily (75%, x=151 g), moderately (50%, x=162 g), and slightly (25%, x=64 g) clipped plants. Much of the new growth was long twig and branch sprouts. Moderate or heavier clipping suppressed flower production. Results were averaged over 4 to 5 consecutive years of clipping .
|Fire regime information on vegetation communities in which oceanspray may occur. This information is taken from the LANDFIRE Rapid Assessment Vegetation Models , which were developed by local experts using available literature, local data, and/or expert opinion. This table summarizes fire regime characteristics for each plant community listed. The PDF file linked from each plant community name describes the model and synthesizes the knowledge available on vegetation composition, structure, and dynamics in that community. Cells are blank where information is not available in the Rapid Assessment Vegetation Model.|
|Vegetation Community (Potential Natural Vegetation Group)||Fire severity*||Fire regime characteristics|
|Percent of fires||Mean interval
|Mountain big sagebrush (cool sagebrush)||Replacement||100%||20||10||40|
|Western juniper (pumice)||Replacement||33%||>1,000|
|Oregon white oak-ponderosa pine||Replacement||16%||125||100||300|
|Surface or low||81%||25||5||30|
|Surface or low||78%||13|
|Oregon white oak||Replacement||3%||275|
|Surface or low||78%||12.5|
|Sitka spruce-western hemlock||Replacement||100%||700||300||>1,000|
|Douglas-fir (Willamette Valley foothills)||Replacement||18%||150||100||400|
|Surface or low||53%||50||20||80|
|Oregon coastal tanoak||Replacement||10%||250|
|Ponderosa pine (xeric)||Replacement||37%||130|
|Surface or low||16%||300|
|Dry ponderosa pine (mesic)||Replacement||5%||125|
|Surface or low||82%||8|
|Douglas-fir-western hemlock (dry mesic)||Replacement||25%||300||250||500|
|Douglas-fir-western hemlock (wet mesic)||Replacement||71%||400|
|Mixed conifer (southwestern Oregon)||Replacement||4%||400|
|Surface or low||67%||22|
|California mixed evergreen (northern California)||Replacement||6%||150||100||200|
|Surface or low||64%||15||5||30|
|Lodgepole pine (pumice soils)||Replacement||78%||125||65||200|
|Pacific silver fir (low elevation)||Replacement||46%||350||100||800|
|Mixed conifer (eastside dry)||Replacement||14%||115||70||200|
|Surface or low||64%||25||20||25|
|Mixed conifer (eastside mesic)||Replacement||35%||200|
|Surface or low||18%||400|
|Vegetation Community (Potential Natural Vegetation Group)||Fire severity*||Fire regime characteristics|
|Percent of fires||Mean interval
|Coastal sage scrub||Replacement||100%||50||20||150|
|Coastal sage scrub-coastal prairie||Replacement||8%||40||8||900|
|Surface or low||62%||5||1||6|
|California oak woodlands||Replacement||8%||120|
|Surface or low||91%||10|
|Surface or low||78%||13|
|California mixed evergreen||Replacement||10%||140||65||700|
|Surface or low||32%||45||7|
|Surface or low||98%||20|
|Mixed conifer (North Slopes)||Replacement||5%||250|
|Surface or low||88%||15||10||40|
|Mixed conifer (South Slopes)||Replacement||4%||200|
|Surface or low||80%||10|
|Aspen with conifer||Replacement||24%||155||50||300|
|Surface or low||61%||60|
|Surface or low||74%||30|
|Mixed evergreen-bigcone Douglas-fir (southern coastal)||Replacement||29%||250|
|Interior white fir (northeastern California)||Replacement||47%||145|
|Surface or low||21%||325|
|Sierra Nevada lodgepole pine (dry subalpine)||Replacement||11%||250||31||500|
|Surface or low||45%||60||9||350|
|Vegetation Community (Potential Natural Vegetation Group)||Fire severity*||Fire regime characteristics|
|Percent of fires||Mean interval
|Montane and subalpine grasslands with shrubs or trees||Replacement||30%||70||10||100|
|Surface or low||70%||30|
|Interior Arizona chaparral||Replacement||100%||125||60||150|
|Mountain sagebrush (cool sage)||Replacement||75%||100|
|Madrean oak-conifer woodland||Replacement||16%||65||25|
|Surface or low||76%||14||1||20|
|Pinyon-juniper (mixed fire regime)||Replacement||29%||430|
|Surface or low||6%||>1,000|
|Pinyon-juniper (rare replacement fire regime)||Replacement||76%||526|
|Surface or low||4%||>1,000|
|Ponderosa pine/grassland (Southwest)||Replacement||3%||300|
|Surface or low||97%||10|
|Riparian forest with conifers||Replacement||100%||435||300||550|
|Riparian deciduous woodland||Replacement||50%||110||15||200|
|Surface or low||30%||180||10|
|Ponderosa pine-Gambel oak (southern Rockies and Southwest)||Replacement||8%||300|
|Surface or low||92%||25||10||30|
|Ponderosa pine-Douglas-fir (southern Rockies)||Replacement||15%||460|
|Surface or low||43%||160|
|Southwest mixed conifer (warm, dry with aspen)||Replacement||7%||300|
|Surface or low||80%||25||2||70|
|Southwest mixed conifer (cool, moist with aspen)||Replacement||29%||200||80||200|
|Surface or low||36%||160||10|
|Aspen with spruce-fir||Replacement||38%||75||40||90|
|Surface or low||23%||125||30||250|
|Lodgepole pine (Central Rocky Mountains, infrequent fire)||Replacement||82%||300||250||500|
|Surface or low||18%||>1,000||>1,000||>1,000|
|Vegetation Community (Potential Natural Vegetation Group)||Fire severity*||Fire regime characteristics|
|Percent of fires||Mean interval
|Great Basin Grassland|
|Mountain meadow (mesic to dry)||Replacement||66%||31||15||45|
|Great Basin Shrubland|
|Wyoming big sagebrush semidesert with trees||Replacement||84%||137||30||200|
|Surface or low||5%||>1,000||20||>1,000|
|Wyoming sagebrush steppe||Replacement||89%||92||30||120|
|Interior Arizona chaparral||Replacement||88%||46||25||100|
|Mountain big sagebrush||Replacement||100%||48||15||100|
|Mountain big sagebrush with conifers||Replacement||100%||49||15||100|
|Mountain sagebrush (cool sage)||Replacement||75%||100|
|Mountain shrubland with trees||Replacement||22%||105||100||200|
|Black and low sagebrushes||Replacement||33%||243||100|
|Great Basin Woodland|
|Juniper and pinyon-juniper steppe woodland||Replacement||20%||333||100||>1,000|
|Surface or low||49%||135||100|
|Surface or low||78%||13|
|Great Basin Forested|
|Interior ponderosa pine||Replacement||5%||161||800|
|Surface or low||86%||9||8||10|
|Surface or low||39%||65||15|
|Great Basin Douglas-fir (dry)||Replacement||12%||90||600|
|Surface or low||75%||14||10||50|
|Aspen with conifer (low to midelevation)||Replacement||53%||61||20|
|Surface or low||23%||143||10|
|Douglas-fir (warm mesic interior)||Replacement||28%||170||80||400|
|Aspen with conifer (high elevation)||Replacement||47%||76||40|
|Surface or low||35%||100||10|
|Stable aspen-cottonwood, no conifers||Replacement||31%||96||50||300|
|Surface or low||69%||44||20||60|
|Aspen with spruce-fir||Replacement||38%||75||40||90|
|Surface or low||23%||125||30||250|
|Stable aspen without conifers||Replacement||81%||150||50||300|
|Surface or low||19%||650||600||>1,000|
|Northern and Central Rockies|
|Vegetation Community (Potential Natural Vegetation Group)||Fire severity*||Fire regime characteristics|
|Percent of fires||Mean interval
|Northern and Central Rockies Shrubland|
|Mountain shrub, nonsagebrush||Replacement||80%||100||20||150|
|Mountain big sagebrush steppe and shrubland||Replacement||100%||70||30||200|
|Northern and Central Rockies Woodland|
|Northern and Central Rockies Forested|
|Ponderosa pine (Northern Great Plains)||Replacement||5%||300|
|Surface or low||75%||20||10||40|
|Ponderosa pine (Northern and Central Rockies)||Replacement||4%||300||100||>1,000|
|Surface or low||77%||15||3||30|
|Ponderosa pine (Black Hills, low elevation)||Replacement||7%||300||200||400|
|Surface or low||71%||30||5||50|
|Ponderosa pine (Black Hills, high elevation)||Replacement||12%||300|
|Surface or low||71%||50|
|Surface or low||39%||65||15|
|Douglas-fir (xeric interior)||Replacement||12%||165||100||300|
|Surface or low||69%||28||15||40|
|Douglas-fir (warm mesic interior)||Replacement||28%||170||80||400|
|Grand fir-Douglas-fir-western larch mix||Replacement||29%||150||100||200|
|Mixed conifer-upland western redcedar-western hemlock||Replacement||67%||225||150||300|
|Western larch-lodgepole pine-Douglas-fir||Replacement||33%||200||50||250|
|Grand fir-lodgepole pine-larch-Douglas-fir||Replacement||31%||220||50||250|
|Persistent lodgepole pine||Replacement||89%||450||300||600|
|Lower subalpine lodgepole pine||Replacement||73%||170||50||200|
|Lower subalpine (Wyoming and Central Rockies)||Replacement||100%||175||30||300|
Replacement: Any fire that causes greater than 75% top removal of a vegetation-fuel type, resulting in general replacement of existing vegetation; may or may not cause a lethal effect on the plants.
Mixed: Any fire burning more than 5% of an area that does not qualify as a replacement, surface, or low-severity fire; includes mosaic and other fires that are intermediate in effects.
Surface or low: Any fire that causes less than 25% upper layer replacement and/or removal in a vegetation-fuel class but burns 5% or more of the area [88,120].
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