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Density Estimates from Point Count Sampling (individuals per hectare)


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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 times per year at point count stations randomly located along line transects. There were 21 transects (10 km in length) that had been randomly selected from a pool of 53 potential routes, with 10 point count stations along each transect (minimum of 200 m spacing between stations). 45 stations were sampled in 2008 (5 stations on each of 9 transects), 60 stations were sampled in 2009 (5 stations on each of 12 transects),190 stations were sampled in 2010 (10 stations on each of 19 transects), 210 stations were sampled in 2011 (10 stations on each [...]


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

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AllSpecies0812SNVPtsDensity.xls 613.5 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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