Wayne E Thogmartin, PhD
I am a quantitative ecologist conducting scholarly research at the intersection of animal ecology, spatial analyses, and statistics.
My interests are in population ecology for animals declining in abundance, asking new questions of multiple, combined data sets to gain novel insight into the dynamics of animal populations, and translating science into guidance for practical management decisions.
Professional Experience
2014 to the present Research Ecologist, US Geological Survey, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin 54603
2002 to 2014 Research Statistician (Biology), US Geological Survey, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin 54603
1995 Wildlife Biologist, United States Forest Service, Forestry Sciences Lab
Education and Certifications
PhD, Zoology, Southern Illinois University, May, 2002
MS, Zoology, University of Arkansas, May, 1998
BA, Ecology / Behavior / Evolution, University of California, San Diego, June, 1990
Science and Products
Filter Total Items: 21
Filter Total Items: 21
No Result Found
Filter Total Items: 145
Multi-scale responses of vegetation to removal of horse grazing from Great Basin (USA) mountain ranges
Although free-roaming equids occur on all of the world's continents except Antarctica, very few studies (and none in the Great Basin, USA) have either investigated their grazing effects on vegetation at more than one spatial scale or compared characteristics of areas from which grazing has been removed to those of currently grazed areas. We compared characteristics of vegetation at 19 sites in nin
Authors
E.A. Beever, R.J. Tausch, W.E. Thogmartin
Relationship of obligate grassland birds to landscape structure in Wisconsin
Conservation plans for grassland birds have included recommendations at the landscape level, but species' responses to landscape structure are variable. We studied the relationships between grassland bird abundances and landscape structure in 800-ha landscapes in Wisconsin, USA, using roadside surveys. Of 9 species considered, abundances of only 4 species differed among landscapes with varying amo
Authors
L.D. Murray, C. A. Ribic, W.E. Thogmartin
Modeling wetland blackbird populations as a function of waterfowl abundance in the prairie pothole region of the United States and Canada
Blackbirds share wetland habitat with many waterfowl species in Bird Conservation Region 11 (BCR 11), the prairie potholes. Because of similar habitat preferences, there may be associations between blackbird populations and populations of one or more species of waterfowl in BCR11. This study models populations of red-winged blackbirds and yellow-headed blackbirds as a function of multiple waterfow
Authors
G.M. Forcey, G.M. Linz, W.E. Thogmartin, W.J. Bleier
Modeling and mapping abundance of American Woodcock across the Midwestern and Northeastern United States
We used an over-dispersed Poisson regression with fixed and random effects, fitted by Markov chain Monte Carlo methods, to model population spatial patterns of relative abundance of American woodcock (Scolopax minor) across its breeding range in the United States. We predicted North American woodcock Singing Ground Survey counts with a log-linear function of explanatory variables describing habita
Authors
W.E. Thogmartin, J.R. Sauer, M. G. Knutson
Power to detect trend in short-term time series of bird abundance
Avian point counts for population monitoring are often collected over a short timespan (e.g., 3-5 years). We examined whether power was adequate (power ???0.80) in short-duration studies to warrant the calculation of trend estimates. We modeled power to detect trends in abundance indices of eight bird species occurring across three floodplain habitats (wet prairie, early successional forest, and m
Authors
W.E. Thogmartin, B. R. Gray, M. Gallagher, N. Young, J.J. Rohweder, M. G. Knutson
Scaling local species-habitat relations to the larger landscape with a hierarchical spatial count model
Much of what is known about avian species-habitat relations has been derived from studies of birds at local scales. It is entirely unclear whether the relations observed at these scales translate to the larger landscape in a predictable linear fashion. We derived habitat models and mapped predicted abundances for three forest bird species of eastern North America using bird counts, environmental v
Authors
W.E. Thogmartin, M. G. Knutson
Influence of land use and climate on wetland breeding birds in the Prairie Pothole region of Canada
Bird populations are influenced by a variety of factors at both small and large scales that range from the presence of suitable nesting habitat, predators, and food supplies to climate conditions and land-use patterns. We evaluated the influences of regional climate and land-use variables on wetland breeding birds in the Canada section of Bird Conservation Region 11 (CA-BCR11), the Prairie Pothole
Authors
G.M. Forcey, G.M. Linz, W.E. Thogmartin, W.J. Bleier
Breeding bird territory placement in riparian wet meadows in relation to invasive reed canary grass, Phalaris arundinacea
Invasive plants are a growing concern worldwide for conservation of native habitats. In endangered wet meadow habitat in the Upper Midwestern United States, reed canary grass (Phalaris arundinacea) is a recognized problem and its prevalence is more widespread than the better-known invasive wetland plant purple loosestrife (Lythrum salicaria). Although resource managers are concerned about the effe
Authors
E.M. Kirsch, B. R. Gray, T.J. Fox, W.E. Thogmartin
A review of the population estimation approach of the North American landbird conservation plan
As part of their development of a continental plan for monitoring landbirds (Rich et al. 2004), Partners in Flight (PIF) applied a new method to make preliminary estimates of population size for all 448 species of landbirds present in the continental United States and Canada (Table 1). Estimation of the global population size of North American landbirds was intended to (1) identify the degree of v
Authors
Wayne E. Thogmartin, Frank P. Howe, Frances C. James, Douglas H. Johnson, Eric T. Reed, John R. Sauer, Frank R. Thompson
Predicting regional abundance of rare grassland birds with a hierarchical spatial count model
Grassland birds are among the most imperiled groups of birds in North America. Unfortunately, little is known about the location of regional concentrations of these birds, thus regional or statewide conservation efforts may be inappropriately applied, reducing their effectiveness. We identified environmental covariates associated with the abundance of five grassland birds in the upper midwestern
Authors
W.E. Thogmartin, M. G. Knutson, J.R. Sauer
USGS bird and land-cover data: Regional bird conservation internet mapping tool takes flight with GIS
No abstract available.
Authors
J.C. Nelson, M.G. Fox, M. G. Knutson, J.R. Sauer, W.E. Thogmartin
Commentary: A cautionary tale regarding use of the National Land Cover Dataset 1992
Digital land-cover data are among the most popular data sources used in ecological research and natural resource management. However, processes for accurate land-cover classification over large regions are still evolving. We identified inconsistencies in the National Land Cover Dataset 1992, the most current and available representation of land cover for the conterminous United States. We also rep
Authors
Wayne E. Thogmartin, Alisa L. Gallant, Melinda G. Knutson, Timothy J. Fox, Manuel J. Suarez
Science and Products
Filter Total Items: 21
Filter Total Items: 21
No Result Found
Filter Total Items: 145
Multi-scale responses of vegetation to removal of horse grazing from Great Basin (USA) mountain ranges
Although free-roaming equids occur on all of the world's continents except Antarctica, very few studies (and none in the Great Basin, USA) have either investigated their grazing effects on vegetation at more than one spatial scale or compared characteristics of areas from which grazing has been removed to those of currently grazed areas. We compared characteristics of vegetation at 19 sites in nin
Authors
E.A. Beever, R.J. Tausch, W.E. Thogmartin
Relationship of obligate grassland birds to landscape structure in Wisconsin
Conservation plans for grassland birds have included recommendations at the landscape level, but species' responses to landscape structure are variable. We studied the relationships between grassland bird abundances and landscape structure in 800-ha landscapes in Wisconsin, USA, using roadside surveys. Of 9 species considered, abundances of only 4 species differed among landscapes with varying amo
Authors
L.D. Murray, C. A. Ribic, W.E. Thogmartin
Modeling wetland blackbird populations as a function of waterfowl abundance in the prairie pothole region of the United States and Canada
Blackbirds share wetland habitat with many waterfowl species in Bird Conservation Region 11 (BCR 11), the prairie potholes. Because of similar habitat preferences, there may be associations between blackbird populations and populations of one or more species of waterfowl in BCR11. This study models populations of red-winged blackbirds and yellow-headed blackbirds as a function of multiple waterfow
Authors
G.M. Forcey, G.M. Linz, W.E. Thogmartin, W.J. Bleier
Modeling and mapping abundance of American Woodcock across the Midwestern and Northeastern United States
We used an over-dispersed Poisson regression with fixed and random effects, fitted by Markov chain Monte Carlo methods, to model population spatial patterns of relative abundance of American woodcock (Scolopax minor) across its breeding range in the United States. We predicted North American woodcock Singing Ground Survey counts with a log-linear function of explanatory variables describing habita
Authors
W.E. Thogmartin, J.R. Sauer, M. G. Knutson
Power to detect trend in short-term time series of bird abundance
Avian point counts for population monitoring are often collected over a short timespan (e.g., 3-5 years). We examined whether power was adequate (power ???0.80) in short-duration studies to warrant the calculation of trend estimates. We modeled power to detect trends in abundance indices of eight bird species occurring across three floodplain habitats (wet prairie, early successional forest, and m
Authors
W.E. Thogmartin, B. R. Gray, M. Gallagher, N. Young, J.J. Rohweder, M. G. Knutson
Scaling local species-habitat relations to the larger landscape with a hierarchical spatial count model
Much of what is known about avian species-habitat relations has been derived from studies of birds at local scales. It is entirely unclear whether the relations observed at these scales translate to the larger landscape in a predictable linear fashion. We derived habitat models and mapped predicted abundances for three forest bird species of eastern North America using bird counts, environmental v
Authors
W.E. Thogmartin, M. G. Knutson
Influence of land use and climate on wetland breeding birds in the Prairie Pothole region of Canada
Bird populations are influenced by a variety of factors at both small and large scales that range from the presence of suitable nesting habitat, predators, and food supplies to climate conditions and land-use patterns. We evaluated the influences of regional climate and land-use variables on wetland breeding birds in the Canada section of Bird Conservation Region 11 (CA-BCR11), the Prairie Pothole
Authors
G.M. Forcey, G.M. Linz, W.E. Thogmartin, W.J. Bleier
Breeding bird territory placement in riparian wet meadows in relation to invasive reed canary grass, Phalaris arundinacea
Invasive plants are a growing concern worldwide for conservation of native habitats. In endangered wet meadow habitat in the Upper Midwestern United States, reed canary grass (Phalaris arundinacea) is a recognized problem and its prevalence is more widespread than the better-known invasive wetland plant purple loosestrife (Lythrum salicaria). Although resource managers are concerned about the effe
Authors
E.M. Kirsch, B. R. Gray, T.J. Fox, W.E. Thogmartin
A review of the population estimation approach of the North American landbird conservation plan
As part of their development of a continental plan for monitoring landbirds (Rich et al. 2004), Partners in Flight (PIF) applied a new method to make preliminary estimates of population size for all 448 species of landbirds present in the continental United States and Canada (Table 1). Estimation of the global population size of North American landbirds was intended to (1) identify the degree of v
Authors
Wayne E. Thogmartin, Frank P. Howe, Frances C. James, Douglas H. Johnson, Eric T. Reed, John R. Sauer, Frank R. Thompson
Predicting regional abundance of rare grassland birds with a hierarchical spatial count model
Grassland birds are among the most imperiled groups of birds in North America. Unfortunately, little is known about the location of regional concentrations of these birds, thus regional or statewide conservation efforts may be inappropriately applied, reducing their effectiveness. We identified environmental covariates associated with the abundance of five grassland birds in the upper midwestern
Authors
W.E. Thogmartin, M. G. Knutson, J.R. Sauer
USGS bird and land-cover data: Regional bird conservation internet mapping tool takes flight with GIS
No abstract available.
Authors
J.C. Nelson, M.G. Fox, M. G. Knutson, J.R. Sauer, W.E. Thogmartin
Commentary: A cautionary tale regarding use of the National Land Cover Dataset 1992
Digital land-cover data are among the most popular data sources used in ecological research and natural resource management. However, processes for accurate land-cover classification over large regions are still evolving. We identified inconsistencies in the National Land Cover Dataset 1992, the most current and available representation of land cover for the conterminous United States. We also rep
Authors
Wayne E. Thogmartin, Alisa L. Gallant, Melinda G. Knutson, Timothy J. Fox, Manuel J. Suarez