Density-weighted proportion (dwp) tool suite
February 2, 2022
Estimating the number of birds or bats killed at a wind power facility involves adjusting observed carcass counts to account for imperfect detection. To account for carcasses that lie outside the searched area, the count is adjusted by dividing by the estimated proportion of carcasses lying within the searched area or the density-weighted proportion (dwp). The dwp package provides tools for estimating dwp for use in mortality estimators such as GenEst (Dalthorp et al. 2018) and Evidence of Absence (Dalthorp et al. 2017).
Citation Information
| Publication Year | 2022 |
|---|---|
| Title | Density-weighted proportion (dwp) tool suite |
| DOI | 10.5066/P9QWO5I0 |
| Authors | Daniel Dalthorp, Manuela Huso, M. Dalthorp, Jeffrey M Mintz |
| Product Type | Software Release |
| Record Source | USGS Asset Identifier Service (AIS) |
| USGS Organization | Forest and Rangeland Ecosystem Science Center (FRESC) Headquarters |
Related
The USGS Techniques and Methods report publication below discusses estimation and interpretation of dwp in the context of several realistic examples; provides guidance for use of the dwp software for doing the analyses; and addresses questions of extrapolation, spatial prediction, and model selection.
Accounting for the fraction of carcasses outside the searched area in the estimation of bird and bat fatalities at wind energy facilities
Accurate estimation of bird and bat mortality at wind energy facilities requires accounting for carcasses that lie outside the search plots because they lie beyond the search radius or in areas within the search radius that remain unsearched due to sub-optimal search conditions such as thick vegetation, rough or dangerous ground, water, or restricted access to the land. However, carcass...
Authors
Daniel Dalthorp, Manuela M. Huso, Mark Dalthorp, Jeffrey Michael Mintz
Related
The USGS Techniques and Methods report publication below discusses estimation and interpretation of dwp in the context of several realistic examples; provides guidance for use of the dwp software for doing the analyses; and addresses questions of extrapolation, spatial prediction, and model selection.
Accounting for the fraction of carcasses outside the searched area in the estimation of bird and bat fatalities at wind energy facilities
Accurate estimation of bird and bat mortality at wind energy facilities requires accounting for carcasses that lie outside the search plots because they lie beyond the search radius or in areas within the search radius that remain unsearched due to sub-optimal search conditions such as thick vegetation, rough or dangerous ground, water, or restricted access to the land. However, carcass...
Authors
Daniel Dalthorp, Manuela M. Huso, Mark Dalthorp, Jeffrey Michael Mintz