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Density Estimates from Line Transect Sampling (individuals per km^2)


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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, [...]


Distributor :
Rob Klinger - USGS
Metadata Contact :
Robert C. Klinger
Originator :
Robert C. Klinger

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AllSpecies0812SNVTranDensity.xls 85 KB


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

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