Brian Cade, PhD
Brian Cade is a Research Statistician at the Fort Collins Science Center.
Science and Products
Filter Total Items: 76
Quantile equivalence to evaluate compliance with habitat management objectives
Equivalence estimated with linear quantile regression was used to evaluate compliance with habitat management objectives at Arapaho National Wildlife Refuge based on monitoring data collected in upland (5,781 ha; n = 511 transects) and riparian and meadow (2,856 ha, n = 389 transects) habitats from 2005 to 2008. Quantiles were used because the management objectives specified proportions of the
Authors
Brian S. Cade, Pamela R. Johnson
Chapter 6: Detectability adjusted count models of songbird abundance
Sagebrush (Artemisia spp.) steppe ecosystems have experienced recent changes resulting not only in the loss of habitat but also fragmentation and degradation of remaining habitats. As a result, sagebrush-obligate and sagebrush associated songbird populations have experienced population declines over the past several decades. We examined landscape-scale responses in occupancy and abundance for six
Authors
Cameron L. Aldridge, Steve E. Hanser, Scott E. Nielsen, Matthias Leu, Brian S. Cade, D. Joanne Saher, Steven T. Knick
Trophic magnification of PCBs and its relationship to the octanol-water partition coefficient
We investigated polychlorinated biphenyl (PCB) bioaccumulation relative to octanol-water partition coefficient (KOW) and organism trophic position (TP) at the Lake Hartwell Superfund site (South Carolina). We measured PCBs (127 congeners) and stable isotopes (??15N) in sediment, organic matter, phytoplankton, zooplankton, macroinvertebrates, and fish. TP, as calculated from ??15N, was significantl
Authors
D.M. Walters, M.A. Mills, B.S. Cade, L.P. Burkard
Chapter 4: A sampling and analytical approach to develop spatial distribution models for sagebrush-associated species
Understanding multi-scale floral and faunal responses to human land use is crucial for informing natural resource management and conservation planning. However, our knowledge on how land use influences sagebrush (Artemisia spp.) ecosystems is limited primarily to site-specific studies. To fill this void, studies across large regions are needed that address how species are distributed relative to t
Authors
Matthias Leu, Steven E. Hanser, Cameron L. Aldridge, Scott E. Nielsen, Brian S. Cade, Steven T. Knick
Assessing conservation relevance of organism-environment relations using predicted changes in response variables
1. Organism–environment models are used widely in conservation. The degree to which they are useful for informing conservation decisions – the conservation relevance of these relations – is important because lack of relevance may lead to misapplication of scarce conservation resources or failure to resolve important conservation dilemmas. Even when models perform well based on model fit and predic
Authors
Kevin J. Gutzwiller, Wylie C. Barrow, Joseph D. White, Lori Johnson-Randall, Brian S. Cade, Lisa M. Zygo
Measuring bulrush culm relationships to estimate plant biomass within a southern California treatment wetland
Assessment of emergent vegetation biomass can be time consuming and labor intensive. To establish a less onerous, yet accurate method, for determining emergent plant biomass than by direct measurements we collected vegetation data over a six-year period and modeled biomass using easily obtained variables: culm (stem) diameter, culm height and culm density. From 1998 through 2005, we collected emer
Authors
Joan S. (Thullen) Daniels, Brian S. Cade, James J. Sartoris
Identifying limits on aquatic insect density exposed to metals in the presence of co-limiting factors
No abstract available.
Authors
Travis S. Schmidt, W.H. Clements, Brian S. Cade
Influences of immunocontraception on time budgets, social behavior, and body condition in feral horses
Managers concerned with shrinking habitats and limited resources for wildlife seek effective tools for limiting population growth in some species. Fertility control is one such tool, yet little is known about its impacts on the behavioral ecology of wild, free-roaming animals. We investigated influences of the immunocontraceptive porcine zona pellucida (PZP) on individual and social behavior in ba
Authors
J.I. Ransom, B.S. Cade, N.T. Hobbs
Application of the Hydroecological Integrity Assessment Process for Missouri Streams
Natural flow regime concepts and theories have established the justification for maintaining or restoring the range of natural hydrologic variability so that physiochemical processes, native biodiversity, and the evolutionary potential of aquatic and riparian assemblages can be sustained. A synthesis of recent research advances in hydroecology, coupled with stream classification using hydroecologi
Authors
Jonathan Kennen, James A. Henriksen, John Heasley, Brian S. Cade, James W. Terrell
Quantifying Equid Behavior - A Research Ethogram for Free-Roaming Feral Horses
Feral horses (Equus caballus) are globally distributed in free-roaming populations on all continents except Antarctica and occupy a wide range of habitats including forest, grassland, desert, and montane environments. The largest populations occur in Australia and North America and have been the subject of scientific study for decades, yet guidelines and ethograms for feral horse behavioral resear
Authors
Jason I. Ransom, Brian S. Cade
Spectral distance decay
Remotely sensed data represents key information for character-izing and estimating biodiversity. Spectral distance among sites has proven to be a powerful approach for detecting species composition variability. Regression analysis of species similarity versus spectral distance may allow us to quantitatively estimate how beta-diversity in species changes with respect to spectral and ecological vari
Authors
D. Rocchinl, H. Nagendra, R. Ghate, B.S. Cade
Fundamental limits to the accuracy of deuterium isotopes for identifying the spatial origin of migratory animals
Deuterium isotope analyses have revolutionized the study of migratory connectivity because global gradients of deuterium in precipitation (??DP) are expressed on a continental scale. Several authors have constructed continental scale base maps of ??DP to provide a spatial reference for studying the movement patterns of migratory species and, although they are very useful, these maps present a stat
Authors
A. Farmer, B.S. Cade, J. Torres-Dowdall
Non-USGS Publications**
Terrell, J.W., B.S. Cade, J. Carpenter, and J.M. Thompson. 1996. Modeling stream fish habitat limitations from wedge-shaped patterns of variation in standing stock. Transactions of the American Fisheries Society. 125(1): 104-
Cade, B. S., and J. D. Richards. 1996. Permutation tests for least absolute deviation regression. Biometrics. 52: 886-9.
Kennedy, P.E., and B.S. Cade. 1996. Randomization tests for multiple regression. Communications in Statistics - Simulation and Computation. 25(4): 923-936.
Baker, B.W. and B.S. Cade. 1995. Predicting biomass of beaver food from willow stem diameters. Journal of Range Management. 48(4): 322-326.
Baker, B.W., B.S. Cade, W.L. Mangus, and J.L. McMillen. 1995. Spatial analysis of sandhill crane nesting habitat. Journal of Wildlife Management. 59(4): 752-7.
Stauffer, D. F., A. H. Farmer, and B. S. Cade. 1992. Use of Wildlife Habitat Models for Habitat Management planning. Proceedings: Resource Technology 90, Second International Symposium on Advanced Technology in Natural Resources Management. Bethesda, MD: American Society of Photogrammetry and Remote Sensing. p. 609-6.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 76
Quantile equivalence to evaluate compliance with habitat management objectives
Equivalence estimated with linear quantile regression was used to evaluate compliance with habitat management objectives at Arapaho National Wildlife Refuge based on monitoring data collected in upland (5,781 ha; n = 511 transects) and riparian and meadow (2,856 ha, n = 389 transects) habitats from 2005 to 2008. Quantiles were used because the management objectives specified proportions of the
Authors
Brian S. Cade, Pamela R. Johnson
Chapter 6: Detectability adjusted count models of songbird abundance
Sagebrush (Artemisia spp.) steppe ecosystems have experienced recent changes resulting not only in the loss of habitat but also fragmentation and degradation of remaining habitats. As a result, sagebrush-obligate and sagebrush associated songbird populations have experienced population declines over the past several decades. We examined landscape-scale responses in occupancy and abundance for six
Authors
Cameron L. Aldridge, Steve E. Hanser, Scott E. Nielsen, Matthias Leu, Brian S. Cade, D. Joanne Saher, Steven T. Knick
Trophic magnification of PCBs and its relationship to the octanol-water partition coefficient
We investigated polychlorinated biphenyl (PCB) bioaccumulation relative to octanol-water partition coefficient (KOW) and organism trophic position (TP) at the Lake Hartwell Superfund site (South Carolina). We measured PCBs (127 congeners) and stable isotopes (??15N) in sediment, organic matter, phytoplankton, zooplankton, macroinvertebrates, and fish. TP, as calculated from ??15N, was significantl
Authors
D.M. Walters, M.A. Mills, B.S. Cade, L.P. Burkard
Chapter 4: A sampling and analytical approach to develop spatial distribution models for sagebrush-associated species
Understanding multi-scale floral and faunal responses to human land use is crucial for informing natural resource management and conservation planning. However, our knowledge on how land use influences sagebrush (Artemisia spp.) ecosystems is limited primarily to site-specific studies. To fill this void, studies across large regions are needed that address how species are distributed relative to t
Authors
Matthias Leu, Steven E. Hanser, Cameron L. Aldridge, Scott E. Nielsen, Brian S. Cade, Steven T. Knick
Assessing conservation relevance of organism-environment relations using predicted changes in response variables
1. Organism–environment models are used widely in conservation. The degree to which they are useful for informing conservation decisions – the conservation relevance of these relations – is important because lack of relevance may lead to misapplication of scarce conservation resources or failure to resolve important conservation dilemmas. Even when models perform well based on model fit and predic
Authors
Kevin J. Gutzwiller, Wylie C. Barrow, Joseph D. White, Lori Johnson-Randall, Brian S. Cade, Lisa M. Zygo
Measuring bulrush culm relationships to estimate plant biomass within a southern California treatment wetland
Assessment of emergent vegetation biomass can be time consuming and labor intensive. To establish a less onerous, yet accurate method, for determining emergent plant biomass than by direct measurements we collected vegetation data over a six-year period and modeled biomass using easily obtained variables: culm (stem) diameter, culm height and culm density. From 1998 through 2005, we collected emer
Authors
Joan S. (Thullen) Daniels, Brian S. Cade, James J. Sartoris
Identifying limits on aquatic insect density exposed to metals in the presence of co-limiting factors
No abstract available.
Authors
Travis S. Schmidt, W.H. Clements, Brian S. Cade
Influences of immunocontraception on time budgets, social behavior, and body condition in feral horses
Managers concerned with shrinking habitats and limited resources for wildlife seek effective tools for limiting population growth in some species. Fertility control is one such tool, yet little is known about its impacts on the behavioral ecology of wild, free-roaming animals. We investigated influences of the immunocontraceptive porcine zona pellucida (PZP) on individual and social behavior in ba
Authors
J.I. Ransom, B.S. Cade, N.T. Hobbs
Application of the Hydroecological Integrity Assessment Process for Missouri Streams
Natural flow regime concepts and theories have established the justification for maintaining or restoring the range of natural hydrologic variability so that physiochemical processes, native biodiversity, and the evolutionary potential of aquatic and riparian assemblages can be sustained. A synthesis of recent research advances in hydroecology, coupled with stream classification using hydroecologi
Authors
Jonathan Kennen, James A. Henriksen, John Heasley, Brian S. Cade, James W. Terrell
Quantifying Equid Behavior - A Research Ethogram for Free-Roaming Feral Horses
Feral horses (Equus caballus) are globally distributed in free-roaming populations on all continents except Antarctica and occupy a wide range of habitats including forest, grassland, desert, and montane environments. The largest populations occur in Australia and North America and have been the subject of scientific study for decades, yet guidelines and ethograms for feral horse behavioral resear
Authors
Jason I. Ransom, Brian S. Cade
Spectral distance decay
Remotely sensed data represents key information for character-izing and estimating biodiversity. Spectral distance among sites has proven to be a powerful approach for detecting species composition variability. Regression analysis of species similarity versus spectral distance may allow us to quantitatively estimate how beta-diversity in species changes with respect to spectral and ecological vari
Authors
D. Rocchinl, H. Nagendra, R. Ghate, B.S. Cade
Fundamental limits to the accuracy of deuterium isotopes for identifying the spatial origin of migratory animals
Deuterium isotope analyses have revolutionized the study of migratory connectivity because global gradients of deuterium in precipitation (??DP) are expressed on a continental scale. Several authors have constructed continental scale base maps of ??DP to provide a spatial reference for studying the movement patterns of migratory species and, although they are very useful, these maps present a stat
Authors
A. Farmer, B.S. Cade, J. Torres-Dowdall
Non-USGS Publications**
Terrell, J.W., B.S. Cade, J. Carpenter, and J.M. Thompson. 1996. Modeling stream fish habitat limitations from wedge-shaped patterns of variation in standing stock. Transactions of the American Fisheries Society. 125(1): 104-
Cade, B. S., and J. D. Richards. 1996. Permutation tests for least absolute deviation regression. Biometrics. 52: 886-9.
Kennedy, P.E., and B.S. Cade. 1996. Randomization tests for multiple regression. Communications in Statistics - Simulation and Computation. 25(4): 923-936.
Baker, B.W. and B.S. Cade. 1995. Predicting biomass of beaver food from willow stem diameters. Journal of Range Management. 48(4): 322-326.
Baker, B.W., B.S. Cade, W.L. Mangus, and J.L. McMillen. 1995. Spatial analysis of sandhill crane nesting habitat. Journal of Wildlife Management. 59(4): 752-7.
Stauffer, D. F., A. H. Farmer, and B. S. Cade. 1992. Use of Wildlife Habitat Models for Habitat Management planning. Proceedings: Resource Technology 90, Second International Symposium on Advanced Technology in Natural Resources Management. Bethesda, MD: American Society of Photogrammetry and Remote Sensing. p. 609-6.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.