Point transect data collected in Colorado 1980/81 to examine effect of agricultural practices upon avian community.
data.frame with 468 observations of 7 variables:
||stratum label (pasture ID)|
||stratum area (set to 1 so density is reported)|
||number of visits|
||radial distance (m)|
||name of study area|
Design consisted of point transects placed in multiple pastures (3 in 1980, 4 in 1981). While many species were observed, only data for Savannah sparrows (Passerculus sandwichensis) are included here.
Data structure for 1981 data set is identical, but there are 448 observations across 4 pastures.
Knopf, F.L., J.A. Sedgwick, and R.W. Cannon. (1988) Guild structure of a riparian avifauna relative to seasonal cattle grazing. The Journal of Wildlife Management 52 (2): 280–290. https://doi.org/10.2307/3801235.
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