Brian Cade, PhD
Brian Cade is a Research Statistician at the Fort Collins Science Center.
Science and Products
Filter Total Items: 76
User manual for Blossom Statistical Software
Blossom is an interactive program for making statistical comparisons with distance-function
based permutation tests developed by P. W. Mielke, Jr. and colleagues at Colorado State
University (Mielke and Berry 2001) and for testing parameters estimated in linear models with
permutation procedures developed by B. S. Cade and colleagues at the Fort Collins Science
Center, U. S. Geological Survey (kno
Authors
Brian S. Cade, Jon Richard
The role of landscape and habitat characteristics in limiting abundance of grassland nesting songbirds in an urban open space
We examine the relationships between abundance of grassland nesting songbirds observed in the Boulder Open Space, CO, USA and parameters that described landscape and habitat characteristics, in order to provide information for Boulder Open Space planners and managers. Data sets included bird abundance and plant species composition, collected during three breeding seasons (1994–1996), and landscape
Authors
S. Haire, C.E. Bock, B.S. Cade, B.C. Bennett
Paradigm shifts in theory and methods: regression quantile analysis enables new insights for ecology
No abstract available.
Authors
C.E. Bock, Brian S. Cade
Estimating effects of constraints on plant performance with regression quantiles
Rates of change in final summer densities of two desert annuals, Eriogonum abertianum and Haplopappus gracilis, as constrained by their initial winter germination densities were estimated with regression quantiles and compared with mechanistic fits based on a self-thinning rule proposed by Guo et al. (1998); Oikos 83: 237–245). The allometric relation used was equivalent to S=Nf (Ni)−1=cf (Ni)−1,
Authors
B.S. Cade, Q. Guo
No consistent effect of plant diversity on productivity
Hector et al. (1) reported on BIODEPTH, a major international experiment on the response of plant productivity to variation in the number of plant species. They found “an overall log-linear reduction of average aboveground biomass with loss of species,” leading to what the accompanying Perspective (2) described as “a rule of thumb—that each halving of diversity leads to a 10 to 20% reduction in pr
Authors
M.A. Huston, L.W. Aarssen, M.P. Austin, B.S. Cade, J.D. Fridley, E. Garnier, J.P. Grime, J. Hodgson, W.K. Lauenroth, K. Thompson, J.H. Vandermeer, D.A. Wardle
Estimating effects of limiting factors with regression quantiles
In a recent Concepts paper in Ecology, Thomson et al. emphasized that assumptions of conventional correlation and regression analyses fundamentally conflict with the ecological concept of limiting factors, and they called for new statistical procedures to address this problem. The analytical issue is that unmeasured factors may be the active limiting constraint and may induce a pattern of unequal
Authors
Brian S. Cade, J. W. Terrell, Richard L. Schroeder
Movement patterns and the conservation of amphibians breeding in small, temporary wetlands
Many amphibians breed in water but live most of their lives in terrestrial habitats. Little is known, however, about the spatial distribution of these habitats or of the distances and directions amphibians move to reach breeding sites. The amphibian community at a small, temporary pond in northcentral Florida was monitored for 5 years. Based on captures and recaptures of more than 2500 striped new
Authors
C. K. Dodd, B.S. Cade
Comment: Cautions on forcing regression equations through the origin
No abstract available.
Authors
Brian S. Cade, James W. Terrell
Comparison of tree basal area and canopy cover in habitat models: Subalpine forest
Canopy cover and basal area are 2 common measures of tree cover used in forest wildlife habitat models and resource selection studies. When choosing between these 2 measures, it is important to recognize that they may differentially estimate relative cover of coexisting tree species due to differences in bole diameter distributions, crown overlap, and crown widths as a function of bole diameter. I
Authors
Brian S. Cade
Estimation of lipids and lean mass of migrating sandpipers
Estimation of lean mass and lipid levels in birds involves the derivation of predictive equations that relate morphological measurements and, more recently, total body electrical conductivity (TOBEC) indices to known lean and lipid masses. Using cross-validation techniques, we evaluated the ability of several published and new predictive equations to estimate lean and lipid mass of Semipalmated Sa
Authors
Susan K. Skagen, Fritz L. Knopf, Brian S. Cade
Differential migration of Blue Grouse in Colorado
We examined migration of adult Blue Grouse (Dendragapus obscurus) in north-central Colorado by radio tracking 13 males and 19 females. Elevational changes associated with movements to winter areas were greater for males (median = 488 m, range = 183-671 m) than females (median = 122 m, range = -61-760 m). Males (median = 10.5 km, range = 1.0-29.4 km) also moved farther than females (median = 1.0 km
Authors
Brian S. Cade, Richard W. Hoffman
Use of wildlife models for habitat management
No abstract available.
Authors
D.F. Stauffer, A.H. Farmer, B.S. Cade
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
User manual for Blossom Statistical Software
Blossom is an interactive program for making statistical comparisons with distance-function
based permutation tests developed by P. W. Mielke, Jr. and colleagues at Colorado State
University (Mielke and Berry 2001) and for testing parameters estimated in linear models with
permutation procedures developed by B. S. Cade and colleagues at the Fort Collins Science
Center, U. S. Geological Survey (kno
Authors
Brian S. Cade, Jon Richard
The role of landscape and habitat characteristics in limiting abundance of grassland nesting songbirds in an urban open space
We examine the relationships between abundance of grassland nesting songbirds observed in the Boulder Open Space, CO, USA and parameters that described landscape and habitat characteristics, in order to provide information for Boulder Open Space planners and managers. Data sets included bird abundance and plant species composition, collected during three breeding seasons (1994–1996), and landscape
Authors
S. Haire, C.E. Bock, B.S. Cade, B.C. Bennett
Paradigm shifts in theory and methods: regression quantile analysis enables new insights for ecology
No abstract available.
Authors
C.E. Bock, Brian S. Cade
Estimating effects of constraints on plant performance with regression quantiles
Rates of change in final summer densities of two desert annuals, Eriogonum abertianum and Haplopappus gracilis, as constrained by their initial winter germination densities were estimated with regression quantiles and compared with mechanistic fits based on a self-thinning rule proposed by Guo et al. (1998); Oikos 83: 237–245). The allometric relation used was equivalent to S=Nf (Ni)−1=cf (Ni)−1,
Authors
B.S. Cade, Q. Guo
No consistent effect of plant diversity on productivity
Hector et al. (1) reported on BIODEPTH, a major international experiment on the response of plant productivity to variation in the number of plant species. They found “an overall log-linear reduction of average aboveground biomass with loss of species,” leading to what the accompanying Perspective (2) described as “a rule of thumb—that each halving of diversity leads to a 10 to 20% reduction in pr
Authors
M.A. Huston, L.W. Aarssen, M.P. Austin, B.S. Cade, J.D. Fridley, E. Garnier, J.P. Grime, J. Hodgson, W.K. Lauenroth, K. Thompson, J.H. Vandermeer, D.A. Wardle
Estimating effects of limiting factors with regression quantiles
In a recent Concepts paper in Ecology, Thomson et al. emphasized that assumptions of conventional correlation and regression analyses fundamentally conflict with the ecological concept of limiting factors, and they called for new statistical procedures to address this problem. The analytical issue is that unmeasured factors may be the active limiting constraint and may induce a pattern of unequal
Authors
Brian S. Cade, J. W. Terrell, Richard L. Schroeder
Movement patterns and the conservation of amphibians breeding in small, temporary wetlands
Many amphibians breed in water but live most of their lives in terrestrial habitats. Little is known, however, about the spatial distribution of these habitats or of the distances and directions amphibians move to reach breeding sites. The amphibian community at a small, temporary pond in northcentral Florida was monitored for 5 years. Based on captures and recaptures of more than 2500 striped new
Authors
C. K. Dodd, B.S. Cade
Comment: Cautions on forcing regression equations through the origin
No abstract available.
Authors
Brian S. Cade, James W. Terrell
Comparison of tree basal area and canopy cover in habitat models: Subalpine forest
Canopy cover and basal area are 2 common measures of tree cover used in forest wildlife habitat models and resource selection studies. When choosing between these 2 measures, it is important to recognize that they may differentially estimate relative cover of coexisting tree species due to differences in bole diameter distributions, crown overlap, and crown widths as a function of bole diameter. I
Authors
Brian S. Cade
Estimation of lipids and lean mass of migrating sandpipers
Estimation of lean mass and lipid levels in birds involves the derivation of predictive equations that relate morphological measurements and, more recently, total body electrical conductivity (TOBEC) indices to known lean and lipid masses. Using cross-validation techniques, we evaluated the ability of several published and new predictive equations to estimate lean and lipid mass of Semipalmated Sa
Authors
Susan K. Skagen, Fritz L. Knopf, Brian S. Cade
Differential migration of Blue Grouse in Colorado
We examined migration of adult Blue Grouse (Dendragapus obscurus) in north-central Colorado by radio tracking 13 males and 19 females. Elevational changes associated with movements to winter areas were greater for males (median = 488 m, range = 183-671 m) than females (median = 122 m, range = -61-760 m). Males (median = 10.5 km, range = 1.0-29.4 km) also moved farther than females (median = 1.0 km
Authors
Brian S. Cade, Richard W. Hoffman
Use of wildlife models for habitat management
No abstract available.
Authors
D.F. Stauffer, A.H. Farmer, B.S. Cade
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.