Skip to main content
U.S. flag

An official website of the United States government

Brian Cade, PhD (Former Employee)

Science and Products

Greater sage-grouse lek in central Wyoming

Evaluating Trends in Greater Sage-Grouse Populations With Quantile Regression

USGS scientists are evaluating the use of quantile regression to develop models of sage-grouse population changes across the United States.
By
Ecosystems Mission Area, Land Management Research Program, Fort Collins Science Center
Evaluating Trends in Greater Sage-Grouse Populations With Quantile Regression

Evaluating Trends in Greater Sage-Grouse Populations With Quantile Regression

USGS scientists are evaluating the use of quantile regression to develop models of sage-grouse population changes across the United States.
Learn More
USGS science for a changing world logo

Hydraulic Fracturing and Water Resources: An Assessment of the Potential Effects of Shale Gas Development on Water Resources in the United States

Shale gas is a key source of onshore domestic energy for the United States and production of this resource is increasing rapidly. Development and extraction of shale gas requires hydraulic fracturing, which entails horizontal drilling, perforation of steel casing and cement grout using explosive charges, and expansion of fractures using fluids under high pressure. Concern over potential
By
John Wesley Powell Center for Analysis and Synthesis
Hydraulic Fracturing and Water Resources: An Assessment of the Potential Effects of Shale Gas Development on Water Resources in the United States

Hydraulic Fracturing and Water Resources: An Assessment of the Potential Effects of Shale Gas Development on Water Resources in the United States

Shale gas is a key source of onshore domestic energy for the United States and production of this resource is increasing rapidly. Development and extraction of shale gas requires hydraulic fracturing, which entails horizontal drilling, perforation of steel casing and cement grout using explosive charges, and expansion of fractures using fluids under high pressure. Concern over potential
Learn More

Data and analytical code to model the growth rate of brown treesnakes (Boiga irregularis), Guam 2004-2013 Data and analytical code to model the growth rate of brown treesnakes (Boiga irregularis), Guam 2004-2013

The data set consists of three files pertaining to invasive Brown Treesnakes (Boiga irregularis) and temporally-associated weather covariates on Guam: 1) snout-vent length (SVL) and sex of brown treesnakes (bts_growth.csv), 2) precipitation (bts_rain.csv), and 3) seasonality (bts_season.csv). Snout-vent lengths in millimeters (mm) and sex of 270 individually marked and recaptured brown...
By
Fort Collins Science Center

Sagebrush recovery analyzed with a dynamic reference approach in southwestern Wyoming, USA 1985-2018 Sagebrush recovery analyzed with a dynamic reference approach in southwestern Wyoming, USA 1985-2018

Identifying ecologically relevant reference sites is important for evaluating ecosystem recovery, but the relevance of references that are temporally static is unclear in the context of vast landscapes with disturbance and environmental contexts varying over space and time. This question is pertinent for landscapes dominated by sagebrush (Artemisia spp.) which face a suite of threats...
By
Land Management Research Program, Fort Collins Science Center

Native Bee Genera in Colorado Conservation Reserve Program Fields, Collected from 2012-2014 Native Bee Genera in Colorado Conservation Reserve Program Fields, Collected from 2012-2014

Data included in this data set are for blue vane trap captured native bees from Logan County, Colorado starting in 2012 and ending in 2014. Data collected were the number of bees captured per date, per field, and identified to genus. Net level data contains 16,229 records.
By
Fort Collins Science Center

Water quality, atmospheric nitrogen deposition and herbaceous plant species richness in the USA, 1970-2011. Water quality, atmospheric nitrogen deposition and herbaceous plant species richness in the USA, 1970-2011.

This data release is comprised of a data set that contains specific conductance and chloride concentration data in HUC-8 watersheds that intersect with areas with unconventional oil and gas plays, and a data set that contains atmospheric nitrogen deposition rates and herbaceous plant species richness values across sample sites in the USA.
By
Fort Collins Science Center

California spotted owl fledgling counts, climate, and landscape habitat at territories on the Lassen National Forest, CA 1991-2010 California spotted owl fledgling counts, climate, and landscape habitat at territories on the Lassen National Forest, CA 1991-2010

This is a comma separated values (csv) file used to conduct the logistic quantile regression analyses in R provided by Cade et al. (2017. Logistic quantile regression provides improved estimates for bounded avian counts: A case study of California spotted owl fledgling production. The Auk: Ornithological Advances. In press). The data set consists of records of California spotted owl...
By
Fort Collins Science Center
Filter Total Items: 78

Growth rate variation in Brown Treesnakes (Boiga irregularis): An invasive species of conservation concern Growth rate variation in Brown Treesnakes (Boiga irregularis): An invasive species of conservation concern

Somatic growth rate is a fundamental trait that influences metabolism, lifespan and reproductive maturity and is critical for understanding population dynamics and informing management actions. Brown Treesnakes (Boiga irregularis) introduced to Guam are highly invasive and can reproduce year-round without discrete cohorts. We compared snake size trajectories described by the...
Authors
Bjorn Lardner, Brian S. Cade, Julie A. Savidge, Gordon H. Rodda, Robert Reed, Amy A. Yackel Adams
By
Ecosystems Mission Area, Fort Collins Science Center

Potential cheatgrass abundance within lightly invaded areas of the Great Basin Potential cheatgrass abundance within lightly invaded areas of the Great Basin

Context Anticipating where an invasive species could become abundant can help guide prevention and control efforts aimed at reducing invasion impacts. Information on potential abundance can be combined with information on the current status of an invasion to guide management towards currently uninvaded locations where the threat of invasion is high. Objectives We aimed to support...
Authors
Helen Sofaer, Catherine S. Jarnevich, Erin K. Buchholtz, Brian S. Cade, John T. Abatzoglou, Cameron L. Aldridge, Patrick Comer, Daniel Manier, Lauren E. Parker, Julie A. Heinrichs
By
Ecosystems Mission Area, Fort Collins Science Center

Assessing vegetation recovery from energy development using a dynamic reference approach Assessing vegetation recovery from energy development using a dynamic reference approach

Ecologically relevant references are useful for evaluating ecosystem recovery, but references that are temporally static may be less useful when environmental conditions and disturbances are spatially and temporally heterogeneous. This challenge is particularly acute for ecosystems dominated by sagebrush (Artemisia spp.), where communities may require decades to recover from disturbance...
Authors
Adrian P. Monroe, Travis W. Nauman, Cameron L. Aldridge, Michael S. O’Donnell, Michael C. Duniway, Brian S. Cade, Daniel Manier, Patrick J. Anderson
By
Ecosystems Mission Area, Fort Collins Science Center, Southwest Biological Science Center

Thermal stability of an adaptable, invasive ectotherm: Argentine giant tegus in the Greater Everglades ecosystem, USA Thermal stability of an adaptable, invasive ectotherm: Argentine giant tegus in the Greater Everglades ecosystem, USA

Invasive species globally threaten biodiversity and economies, but the ecophysiological mechanisms underlying their success are often understudied. For those alien species that also exhibit high phenotypic plasticity, such as habitat generalists, adaptations in response to environmental pressures can take place relatively quickly. The Argentine giant tegu (Salvator merianae; tegu) is a...
Authors
Andrea Faye Currylow, Michelle Collier, Emma B. Hanslowe, Bryan G. Falk, Brian S. Cade, Sarah E. Moy, Alejandro Grajal-Puche, Frank N. Ridgley, Robert Reed, Amy A. Yackel Adams
By
Ecosystems Mission Area, Fort Collins Science Center

Comment on “Female toads engaging in adaptive hybridization prefer high-quality heterospecifics as mates” Comment on “Female toads engaging in adaptive hybridization prefer high-quality heterospecifics as mates”

Chen and Pfennig (Reports, 20 March 2020, p. 1377) analyze the fitness consequences of hybridization in toads but do not account for differences in survival among progeny. Apparent fitness effects depend on families with anomalously low survival, yet survival is crucial to evolutionary fitness. This and other analytical shortcomings demonstrate that a conclusion of adaptive mate choice...
Authors
Michael J. Braun, Gerald S. Wilkinson, Brian S. Cade
By
Ecosystems Mission Area, Fort Collins Science Center

Latitudinal patterns of alien plant invasions Latitudinal patterns of alien plant invasions

Latitudinal patterns of biodiversity have long been a central topic in ecology and evolutionary biology. However, while most previous studies have focused on native species, little effort has been devoted to latitudinal patterns of plant invasions (with a few exceptions based on data from sparse locations). Using the most up‐to‐date worldwide native and alien plant distribution data from...
Authors
Qinfeng Guo, Brian S. Cade, Wayne Dawson, Franz Essl, Holger Kreft, Jan Pergl, Mark van Kleunen, Patrick Weigelt, Marten Winter, Petr Pyšek
By
Ecosystems Mission Area, Fort Collins Science Center

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.

Blossom Statistical Package for R Blossom Statistical Package for R

Blossom is an R package with functions for making statistical comparisons with distance-function based permutation tests developed by P.W. Mielke, Jr. and colleagues at Colorado State University, and for testing parameters estimated in linear models with permutation procedures developed by B. S. Cade and colleagues at the U.S. Geological Survey' Fort Collins Science Center, U.S...
By
Fort Collins Science Center

Blossom Statistical Package Blossom Statistical Package

Blossom is an interactive program for making statistical comparisons with distance-function based permutation tests and for testing parameters estimated in linear models with permutation procedures.
By
Fort Collins Science Center

Science and Products

Greater sage-grouse lek in central Wyoming

Evaluating Trends in Greater Sage-Grouse Populations With Quantile Regression

USGS scientists are evaluating the use of quantile regression to develop models of sage-grouse population changes across the United States.
By
Ecosystems Mission Area, Land Management Research Program, Fort Collins Science Center
Evaluating Trends in Greater Sage-Grouse Populations With Quantile Regression

Evaluating Trends in Greater Sage-Grouse Populations With Quantile Regression

USGS scientists are evaluating the use of quantile regression to develop models of sage-grouse population changes across the United States.
Learn More
USGS science for a changing world logo

Hydraulic Fracturing and Water Resources: An Assessment of the Potential Effects of Shale Gas Development on Water Resources in the United States

Shale gas is a key source of onshore domestic energy for the United States and production of this resource is increasing rapidly. Development and extraction of shale gas requires hydraulic fracturing, which entails horizontal drilling, perforation of steel casing and cement grout using explosive charges, and expansion of fractures using fluids under high pressure. Concern over potential
By
John Wesley Powell Center for Analysis and Synthesis
Hydraulic Fracturing and Water Resources: An Assessment of the Potential Effects of Shale Gas Development on Water Resources in the United States

Hydraulic Fracturing and Water Resources: An Assessment of the Potential Effects of Shale Gas Development on Water Resources in the United States

Shale gas is a key source of onshore domestic energy for the United States and production of this resource is increasing rapidly. Development and extraction of shale gas requires hydraulic fracturing, which entails horizontal drilling, perforation of steel casing and cement grout using explosive charges, and expansion of fractures using fluids under high pressure. Concern over potential
Learn More

Data and analytical code to model the growth rate of brown treesnakes (Boiga irregularis), Guam 2004-2013 Data and analytical code to model the growth rate of brown treesnakes (Boiga irregularis), Guam 2004-2013

The data set consists of three files pertaining to invasive Brown Treesnakes (Boiga irregularis) and temporally-associated weather covariates on Guam: 1) snout-vent length (SVL) and sex of brown treesnakes (bts_growth.csv), 2) precipitation (bts_rain.csv), and 3) seasonality (bts_season.csv). Snout-vent lengths in millimeters (mm) and sex of 270 individually marked and recaptured brown...
By
Fort Collins Science Center

Sagebrush recovery analyzed with a dynamic reference approach in southwestern Wyoming, USA 1985-2018 Sagebrush recovery analyzed with a dynamic reference approach in southwestern Wyoming, USA 1985-2018

Identifying ecologically relevant reference sites is important for evaluating ecosystem recovery, but the relevance of references that are temporally static is unclear in the context of vast landscapes with disturbance and environmental contexts varying over space and time. This question is pertinent for landscapes dominated by sagebrush (Artemisia spp.) which face a suite of threats...
By
Land Management Research Program, Fort Collins Science Center

Native Bee Genera in Colorado Conservation Reserve Program Fields, Collected from 2012-2014 Native Bee Genera in Colorado Conservation Reserve Program Fields, Collected from 2012-2014

Data included in this data set are for blue vane trap captured native bees from Logan County, Colorado starting in 2012 and ending in 2014. Data collected were the number of bees captured per date, per field, and identified to genus. Net level data contains 16,229 records.
By
Fort Collins Science Center

Water quality, atmospheric nitrogen deposition and herbaceous plant species richness in the USA, 1970-2011. Water quality, atmospheric nitrogen deposition and herbaceous plant species richness in the USA, 1970-2011.

This data release is comprised of a data set that contains specific conductance and chloride concentration data in HUC-8 watersheds that intersect with areas with unconventional oil and gas plays, and a data set that contains atmospheric nitrogen deposition rates and herbaceous plant species richness values across sample sites in the USA.
By
Fort Collins Science Center

California spotted owl fledgling counts, climate, and landscape habitat at territories on the Lassen National Forest, CA 1991-2010 California spotted owl fledgling counts, climate, and landscape habitat at territories on the Lassen National Forest, CA 1991-2010

This is a comma separated values (csv) file used to conduct the logistic quantile regression analyses in R provided by Cade et al. (2017. Logistic quantile regression provides improved estimates for bounded avian counts: A case study of California spotted owl fledgling production. The Auk: Ornithological Advances. In press). The data set consists of records of California spotted owl...
By
Fort Collins Science Center
Filter Total Items: 78

Growth rate variation in Brown Treesnakes (Boiga irregularis): An invasive species of conservation concern Growth rate variation in Brown Treesnakes (Boiga irregularis): An invasive species of conservation concern

Somatic growth rate is a fundamental trait that influences metabolism, lifespan and reproductive maturity and is critical for understanding population dynamics and informing management actions. Brown Treesnakes (Boiga irregularis) introduced to Guam are highly invasive and can reproduce year-round without discrete cohorts. We compared snake size trajectories described by the...
Authors
Bjorn Lardner, Brian S. Cade, Julie A. Savidge, Gordon H. Rodda, Robert Reed, Amy A. Yackel Adams
By
Ecosystems Mission Area, Fort Collins Science Center

Potential cheatgrass abundance within lightly invaded areas of the Great Basin Potential cheatgrass abundance within lightly invaded areas of the Great Basin

Context Anticipating where an invasive species could become abundant can help guide prevention and control efforts aimed at reducing invasion impacts. Information on potential abundance can be combined with information on the current status of an invasion to guide management towards currently uninvaded locations where the threat of invasion is high. Objectives We aimed to support...
Authors
Helen Sofaer, Catherine S. Jarnevich, Erin K. Buchholtz, Brian S. Cade, John T. Abatzoglou, Cameron L. Aldridge, Patrick Comer, Daniel Manier, Lauren E. Parker, Julie A. Heinrichs
By
Ecosystems Mission Area, Fort Collins Science Center

Assessing vegetation recovery from energy development using a dynamic reference approach Assessing vegetation recovery from energy development using a dynamic reference approach

Ecologically relevant references are useful for evaluating ecosystem recovery, but references that are temporally static may be less useful when environmental conditions and disturbances are spatially and temporally heterogeneous. This challenge is particularly acute for ecosystems dominated by sagebrush (Artemisia spp.), where communities may require decades to recover from disturbance...
Authors
Adrian P. Monroe, Travis W. Nauman, Cameron L. Aldridge, Michael S. O’Donnell, Michael C. Duniway, Brian S. Cade, Daniel Manier, Patrick J. Anderson
By
Ecosystems Mission Area, Fort Collins Science Center, Southwest Biological Science Center

Thermal stability of an adaptable, invasive ectotherm: Argentine giant tegus in the Greater Everglades ecosystem, USA Thermal stability of an adaptable, invasive ectotherm: Argentine giant tegus in the Greater Everglades ecosystem, USA

Invasive species globally threaten biodiversity and economies, but the ecophysiological mechanisms underlying their success are often understudied. For those alien species that also exhibit high phenotypic plasticity, such as habitat generalists, adaptations in response to environmental pressures can take place relatively quickly. The Argentine giant tegu (Salvator merianae; tegu) is a...
Authors
Andrea Faye Currylow, Michelle Collier, Emma B. Hanslowe, Bryan G. Falk, Brian S. Cade, Sarah E. Moy, Alejandro Grajal-Puche, Frank N. Ridgley, Robert Reed, Amy A. Yackel Adams
By
Ecosystems Mission Area, Fort Collins Science Center

Comment on “Female toads engaging in adaptive hybridization prefer high-quality heterospecifics as mates” Comment on “Female toads engaging in adaptive hybridization prefer high-quality heterospecifics as mates”

Chen and Pfennig (Reports, 20 March 2020, p. 1377) analyze the fitness consequences of hybridization in toads but do not account for differences in survival among progeny. Apparent fitness effects depend on families with anomalously low survival, yet survival is crucial to evolutionary fitness. This and other analytical shortcomings demonstrate that a conclusion of adaptive mate choice...
Authors
Michael J. Braun, Gerald S. Wilkinson, Brian S. Cade
By
Ecosystems Mission Area, Fort Collins Science Center

Latitudinal patterns of alien plant invasions Latitudinal patterns of alien plant invasions

Latitudinal patterns of biodiversity have long been a central topic in ecology and evolutionary biology. However, while most previous studies have focused on native species, little effort has been devoted to latitudinal patterns of plant invasions (with a few exceptions based on data from sparse locations). Using the most up‐to‐date worldwide native and alien plant distribution data from...
Authors
Qinfeng Guo, Brian S. Cade, Wayne Dawson, Franz Essl, Holger Kreft, Jan Pergl, Mark van Kleunen, Patrick Weigelt, Marten Winter, Petr Pyšek
By
Ecosystems Mission Area, Fort Collins Science Center

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.

Blossom Statistical Package for R Blossom Statistical Package for R

Blossom is an R package with functions for making statistical comparisons with distance-function based permutation tests developed by P.W. Mielke, Jr. and colleagues at Colorado State University, and for testing parameters estimated in linear models with permutation procedures developed by B. S. Cade and colleagues at the U.S. Geological Survey' Fort Collins Science Center, U.S...
By
Fort Collins Science Center

Blossom Statistical Package Blossom Statistical Package

Blossom is an interactive program for making statistical comparisons with distance-function based permutation tests and for testing parameters estimated in linear models with permutation procedures.
By
Fort Collins Science Center
Was this page helpful?