Spatially-dependent Models of Avian Diversity on the Green Mountain National Forest
Personnel: Yvette Ortega, David Capen

Cooperators: Dick DeGraaf, USDA Forest Service Northeastern Forest Experiment Station, Clay Grove, Green Mountain National Forest


Data collected from 1986-1995 have been compiled to document the presence or absence of 83 bird species at more than 1000 sample locations on the northern half of the Green Mountain National Forest (GMNF). Locational information was linked to GIS data layers detailing microscale information such as community type (forest types by age class) and ecological land type classifications. A map for Solitary Vireo (53k) displays point-count locations, highlighting Land Type Associations (LTA) as well as detections.

Resultant habitat models can be used to predict meso- or macroscale-level species diversity, and be examined at differing scales of habitat classification.

GIS techniques are being used to quantify landscape-level patterns, considering the composition and configuration of habitat units. The relationships between bird species occurrence and these environmental variables will be examined for each species. The resultant habitat models thereby consider the responses of individual species to environmental variables over a range of scales, enabling refined predictions of bird species diversity across the GMNF.

       Updated: 28 June 2000