Savannah_sparrow_1980: Savanna sparrow point transects
Description Format Details Note References
Description
Point transect data collected in Colorado 1980/81 to examine effect of agricultural practices upon avian community.
Format
data.frame with 468 observations of 7 variables:
Region.Label | stratum label (pasture ID) |
Area | stratum area (set to 1 so density is reported) |
Sample.Label | transect identifier |
Effort | number of visits |
object | object ID |
distance | radial distance (m) |
Study.Area | name of study area |
Details
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.
Note
Data structure for 1981 data set is identical, but there are 448 observations across 4 pastures.
References
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.
