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Keyword: species diversity

100 years of vegetation change at the Sierra Ancha Experimental Forest

Projects Posted on: March 08, 2019
This project incorporates historical data collected at the Sierra Ancha Experimental Forest nearly 100 years ago to determine how plant communities have changed over that period of time.

Faunal characteristics of the Southern Rocky Mountains of New Mexico: implications for biodiversity analysis and assessment

Publications Posted on: May 12, 2016
To define the faunal context within which local and regional resource management decisions are made, conservation of biological diversity requires an understanding of regional species occurrence patterns. Our study focused on the Southern Rocky Mountains of New Mexico and included the San Juan, the Sangre de Cristo, and the Jemez Mountains.

Regional data to support biodiversity assessments: terrestrial vertebrate and butterfly data from the Southwest

Publications Posted on: May 12, 2016
Spatially explicit data on the location of species across broad geographic areas greatly facilitate effective conservation planning on lands managed for multiple uses. The importance of these data notwithstanding, our knowledge about the geography of biodiversity is remarkably incomplete.

Vegetation response after post-fire mulching and native grass seeding

Publications Posted on: July 08, 2015
Post-fire mulch and seeding treatments, often applied on steep, severely burned slopes immediately after large wildfires, are meant to reduce the potential of erosion and establishment of invasive plants, especially non-native plants, that could threaten values at risk. However, the effects of these treatments on native vegetation response post fire are little studied, especially beyond one to two years.

Landscape-level patterns of avian diversity in the Oregon Coast Range

Publications Posted on: March 14, 2012
We used a comparative mensurative landscape-level experiment to quantify the relative importance of mature forest area and fragmentation and differences among watersheds in influencing avian community diversity in the Oregon Coast Range, USA. Our study design included three large hydrological basins, two levels of fragmentation, and six levels of mature forest area. We recorded 82 species of birds in a total of 1046 plots in 30 landscapes.

Determining potential wildlife benefits from wildfire in Arizona ponderosa pine forests

Publications Posted on: May 05, 2011
Large wildfires are frequently destructive to the timber resource, but wildlife may not be so adversely affected. A study of selected species of wildlife (deer, elk, rodents, and birds) that were present on large burned areas, 1, 3, 7, and 20 years old, indicated population fluctuations and habitat changes that are, for the most part, predictable, and can be expressed in economic terms.

Similarities in riparian bird communities among elevational zones in southeastern Wyoming

Publications Posted on: September 07, 2010
I examined trends in bird species richness and overall bird abundance in riparian habitats among elevations varying from 6740 ft. to 9800 ft. in southeastern Wyoming. Bird species diversity ranged from a low of three bird species and 23 pairs in subalpine shrub willow habitat to a maximum of 21 species and 101 pairs in lowland cottonwood habitat.

Effects of plot size on forest-type algorithm accuracy

Publications Posted on: July 15, 2009
The Forest Inventory and Analysis (FIA) program utilizes an algorithm to consistently determine the forest type for forested conditions on sample plots. Forest type is determined from tree size and species information. Thus, the accuracy of results is often dependent on the number of trees present, which is highly correlated with plot area.

Post-fire burn severity and vegetation response following eight large wildfires across the Western United States

Publications Posted on: March 14, 2008
Vegetation response and burn severity were examined following eight large wildfires that burned in 2003 and 2004: two wildfires in California chaparral, two each in dry and moist mixed-conifer forests in Montana, and two in boreal forests in interior Alaska.

Identifying gaps in conservation networks: of indicators and uncertainty in geographic-based analyses

Publications Posted on: July 11, 2006
Mapping of biodiversity elements to expose gaps in. conservation networks has become a common strategy in nature-reserve design. We review a set of critical assumptions and issues that influence the interpretation and implementation of gap analysis, including: (1) the assumption that a subset of taxa can be used to indicate overall diversity patterns, and (2) the impact of uncertainty and error propagation in reserve design.