Linda Weir
Biography
Linda Weir is a Research Manager at the USGS Patuxent Wildlife Research Center, where she oversees the work of research scientists specializing in migratory birds, coastal ecology, and ecotoxicology. She currently oversees the USGS National Amphibian Atlas and is the former coordinator of the North American Amphibian Monitoring Program.
Science and Products
Southeast regional and state trends in anuran occupancy from calling survey data (2001-2013) from the North American Amphibian Monitoring Program
We present the first regional trends in anuran occupancy for eight states of the southeastern United States, based on 13 y (2001–2013) of North American Amphibian Monitoring Program (NAAMP) data. The NAAMP is a longterm monitoring program in which observers collect anuran calling observation data at fixed locations along random roadside routes. We...
Villena Carpio, Oswaldo; Royle, J. Andrew; Weir, Linda; Foreman, Tasha M.; Gazenski, Kimberly D.; Campbell Grant, Evan H. Performance of species occurrence estimators when basic assumptions are not met: a test using field data where true occupancy status is known
Populations are rarely censused. Instead, observations are subject to incomplete detection, misclassification and detection heterogeneity that result from human and environmental constraints. Though numerous methods have been developed to deal with observational uncertainty, validation under field conditions is rare because truth is rarely known...
Miller, David A. W.; Bailey, Larissa L.; Grant, Evan H. Campbell; McClintock, Brett T.; Weir, Linda A.; Simons, Theodore R. Annual Report: 2014: Partners in Amphibian and Reptile Conservation (PARC)
Partners in Amphibian and Reptile Conservation (PARC) was established in 1999 to address the widespread declines, extinctions, and range reductions of amphibians and reptiles, with a focus on conservation of taxa and habitats in North America. Amphibians and reptiles are affected by a broad range of human activities, both as incidental effects of...
Weir, Linda A.; Nanjappa, P.; Apodaca, J.J.; Williams, J. Northeast regional and state trends in anuran occupancy from calling survey data (2001-2011) from the North American Amphibian Monitoring Program
We present the first regional trends in anuran occupancy from North American Amphibian Monitoring Program (NAAMP) data from 11 northeastern states using an 11 years of data. NAAMP is a long-term monitoring program where observers collect data at assigned random roadside routes using a calling survey technique. We assessed occupancy trends for 17...
Weir, Linda A.; Royle, Andy; Gazenski, Kimberly D.; Villena Carpio, Oswaldo North American amphibians: Distribution and diversity
Some 300 species of amphibians inhabit North America. The past two decades have seen an enormous growth in interest about amphibians and an increased intensity of scientific research into their fascinating biology and continent-wide distribution.This atlas presents the spectacular diversity of North American amphibians in a geographic context. It...
Green, David M.; Weir, Linda A.; Casper, Gary S.; Lannoo, Michael Partners in amphibian and reptile conservation 2013 annual report
Partners in Amphibian and Reptile Conservation (PARC) was established in 1999 to address the widespread declines, extinctions, and range reductions of amphibians and reptiles, with a focus on conservation of taxa and habitats in North America. Amphibians and reptiles are affected by a broad range of human activities, both as incidental effects of...
Conrad, Paulette M.; Weir, Linda A.; Nanjappa, Priya Experimental investigation of false positive errors in auditory species occurrence surveys
False positive errors are a significant component of many ecological data sets, which in combination with false negative errors, can lead to severe biases in conclusions about ecological systems. We present results of a field experiment where observers recorded observations for known combinations of electronically broadcast calling anurans under...
Miller, David A.W.; Weir, Linda A.; McClintock, Brett T.; Grant, Evan H. Campbell; Bailey, Larissa L.; Simons, Theodore R. Improving occupancy estimation when two types of observational error occur: Non-detection and species misidentification
Efforts to draw inferences about species occurrence frequently account for false negatives, the common situation when individuals of a species are not detected even when a site is occupied. However, recent studies suggest the need to also deal with false positives, which occur when species are misidentified so that a species is recorded as...
Miller, David A.; Nichols, J.D.; McClintock, B.T.; Grant, E.H.C.; Bailey, L.L.; Weir, L.A. Trends in anuran occupancy from northeastern states of the North American Monitoring Program
We present the first multi-year occupancy trends from North American Amphibian Monitoring Program (NAAMP) data in 10 northeastern states using seven years of data (2001-2007). NAAMP uses a calling survey technique where observers listen for anuran vocalizations along assigned random roadside routes. We were able to assess occupancy trends in 10...
Weir, Linda; Fiske, Ian J.; Royle, J. Andrew Geographic distribution: Hemidactylium scutatum (four-toed salamander.) USA: Maine
Windmiller, B.; Weir, L.; Barber, B.; Blazej, K.; Mittelhauser, G.; Mittelhauser, P.; Roen, K. Modeling anuran detection and site occupancy on North American Amphibian Monitoring Program (NAAMP) routes in Maryland
One of the most fundamental problems in monitoring animal populations is that of imperfect detection. Although imperfect detection can be modeled, studies examining patterns in occurrence often ignore detection and thus fail to properly partition variation in detection from that of occurrence. In this study, we used anuran calling survey data...
Weir, L.A.; Royle, J. Andrew; Nanjappa, P.; Jung, R.E.