a_species page (American holly

American holly (Ilex opaca) Family: Aquifoliaceae
Guild: persistent, slow-growing understory tolerant
Functional Lifeform: small evergreen tree
Silvics Manual: Click here for American holly
(Main Silvics Page: http://www.na.fs.fed.us/spfo/pubs/silvics_manual/table_of_contents.htm)

Life History Attributes & Disturbance Response

Ecological Attributes & Status of Species

Distribution Maps/Tables for American holly:

Distribution Maps for American holly: (Outputs will appear in new window)

Current-FIA

GISS

GFDL

Hadley

UKMO

CCC

Summary (All-5)

5-GCM Average

Distribution Tables for American holly: (Outputs will appear in new window)

IV Change Average IV IV*Area Area Change Total Area(%) N-S Shift Potential Winners/Losers

Ecological Attributes and Status of American holly:
(Output appears in Output Area: below)

Ecological Attributes Soil Elevation Climate

Output Area:

Ilex opaca American Holly Aquifoliaceae

FIA distributions (504 counties) quartiles: min 1st mean median 3rd max rank

Diameter, cm (3241 plots) 0.3 3.4 7.3 5.1 8.6 54.6 73

Growth Rate, cm2/yr (398 plots) 0.1 1.8 6.1 4.4 8.4 53.2 76

Annual Temperature, �C 4.8 14.2 16.0 16.5 18.0 20.7 14

January Temperature, �C -6.2 3.1 5.6 5.9 8.2 13.4 10

Precipitation, mm 959 1160 1280 1260 1380 1930 15

Potential Evapotranspiration, mm/month 24.0 65.3 72.1 74.1 80.1 107.0 17

Maximum Elevation, m 5 77 272 152 255 1950 71

Slope, percent 0.6 2.4 8.9 5.9 10.5 49.8 62

pH 2.1 4.1 4.4 4.5 4.8 7.0 58

Permeability, cm/hr 0.3 1.4 3.1 2.3 4.3 11.0 21

Organic Matter, percent 0.8 1.3 2.9 1.8 2.8 46.2 68

Clay, percent 4.1 18.5 22.1 22.2 26.8 43.9 58

Water-Holding Capacity, cm/cm 4.1 6.3 7.2 6.9 7.9 12.0 53

Maps of Current FIA's IV, Predicted-Current IV (acc. to RTA Model) & Geographic Predictors

Maps of Predicted-Current IV, Predicted IV (GISS GCM), the Difference with Current & Potential Shifts (acc. to RTA Model)

Maps of Predicted-Current IV, Predicted IV (GFDL GCM), the Difference with Current & Potential Shifts (acc. to RTA Model

Maps of Predicted-Current IV, Predicted IV (Hadley GCM),the Difference with Current & Potential Shifts (acc. to RTA Model)

Maps of Predicted-Current IV, Predicted IV (UKMO GCM), the Difference with Current & Potential Shifts (acc. to RTA Model)

Maps of Predicted-Current IV, Predicted IV (CCC GCM), the Difference with Current & Potential Shifts (acc. to RTA Model)

Predicted IVs of Current & 5 GCM models for quick comparison

IV Change for all 5 Climate Change Scenarios

Average IV for all 5 Climate Change Scenarios

Area Weighted IV % change for all 5 Climate Change Scenarios

Area Change for all 5 Climate Change Scenarios

Percent of Total Area for all 5 Climate Change Scenarios

N-S Shift for all 5 Climate Change Scenarios

Sorted table of % Change of IV*Area averaged across all 5 Climate Change Scenarios

Statistical-range table of ecological attributes for some key variables

Chart of optimum IV range for pH and permeablility

Chart of optimum IV range for max. elevation and soil slope

Chart of optimum IV range for avg. annual temperature and annual precipitation

Average IV of all 5 GCMs.

FIA distributions (504 counties) quartiles:	min	1st	mean	median	3rd	max	rank
Diameter, cm (3241 plots)	0.3	3.4	7.3	5.1	8.6	54.6	73
Growth Rate, cm2/yr (398 plots)	0.1	1.8	6.1	4.4	8.4	53.2	76
Annual Temperature, �C	4.8	14.2	16.0	16.5	18.0	20.7	14
January Temperature, �C	-6.2	3.1	5.6	5.9	8.2	13.4	10
Precipitation, mm	959	1160	1280	1260	1380	1930	15
Potential Evapotranspiration, mm/month	24.0	65.3	72.1	74.1	80.1	107.0	17
Maximum Elevation, m	5	77	272	152	255	1950	71
Slope, percent	0.6	2.4	8.9	5.9	10.5	49.8	62
pH	2.1	4.1	4.4	4.5	4.8	7.0	58
Permeability, cm/hr	0.3	1.4	3.1	2.3	4.3	11.0	21
Organic Matter, percent	0.8	1.3	2.9	1.8	2.8	46.2	68
Clay, percent	4.1	18.5	22.1	22.2	26.8	43.9	58
Water-Holding Capacity, cm/cm	4.1	6.3	7.2	6.9	7.9	12.0	53