Density Estimates from Line Transect Sampling (individuals per km^2)
Dates
Start Date
2008-07-01
End Date
2012-09-15
Summary
Density estimates of four mammal species in the upper subalpine and alpine zones of the Sierra Nevada range, 2008 - 2012. The estimates were derived from variable distance data collected 3-4 per year along each of 21 transects (10 km in length). The transects were randomly selected from a pool of 53 potential routes. Nine transects were sampled in 2008, 12 were sampled in 2009, 19 were sampled in 2010, 21 were sampled in 2011, and 17 were sampled in 2012. All counts were done in July and August each year. Replicate samples within a given year were done within 2-8 days of each other. All counts were done by single observers. The spreadsheet has six worksheets, including three with density estimates for each species at different scales, [...]
Summary
Density estimates of four mammal species in the upper subalpine and alpine zones of the Sierra Nevada range, 2008 - 2012. The estimates were derived from variable distance data collected 3-4 per year along each of 21 transects (10 km in length). The transects were randomly selected from a pool of 53 potential routes. Nine transects were sampled in 2008, 12 were sampled in 2009, 19 were sampled in 2010, 21 were sampled in 2011, and 17 were sampled in 2012. All counts were done in July and August each year. Replicate samples within a given year were done within 2-8 days of each other. All counts were done by single observers. The spreadsheet has six worksheets, including three with density estimates for each species at different scales, one worksheet with definitions of the fields, one worksheet with the species names, and a worksheet that defines the scale and units of the estimates in the five worksheets for density
Click on title to download individual files attached to this item.
AllSpecies0812SNVTranDensity_xls.xml Original FGDC Metadata
View
11.7 KB
application/fgdc+xml
AllSpecies0812SNVTranDensity.xls
85 KB
application/vnd.ms-excel
Purpose
The data are being used in a number of ways. The five main ones include: 1. Evaluation of spatio-temporal patterns of abundance and occupancy 2. Evaluation of relationships of abundance with climatic, topographic, and land cover variables 3. Quantifying the niches of the four species 4. Model patterns of abundance and occupancy throughout the range 5. Evaluate spatio-temporal habitat use and selection patterns for the species individually and as an assemblage
Communities
National CASC
National and Regional Climate Adaptation Science Centers
