Upper Midwest Environmental Sciences Center
Brian GrayPosition title: Statistician
Email: brgray@usgs.gov
Phone: 608.781.6234
Fax: 608.783.6066
Education:
Ph.D. (Biostatistics), University of South Carolina, Columbia, SC, 2001
M.S. (Biology), University of Kentucky, Lexington, KY, 1993
Diploma in Natural Resources, Lincoln University, New Zealand, 1982
B.Sc. (Botany), University of Auckland, Auckland, New Zealand, 1981
Primary Responsibilities/Activities:
Primary responsibilities include statistical support to the Upper Mississippi River’s Long Term Resource Monitoring Program and to Center scientists, and research in ecological statistics.
Research Interests:
Select Publications:
McKann PC, BR Gray and WE Thogmartin. 2012. Small sample bias in dynamic occupancy models. Journal of Wildlife Management DOI: 10.1002/jwmg.433.
Gray, B. 2012. Variance components estimation for continuous and discrete data, with emphasis on cross-classified sampling designs. In: Gitzen, R.A., J.J. Millspaugh, A.B. Cooper, D.S. Licht, editors. Design and analysis of long-term ecological monitoring studies. Cambridge University Press.
Toribio SG, BR Gray and S Liang. 2011. An evaluation of the Bayesian approach for fitting the N-mixture model for use with pseudo-replicated count data. Journal of Statistical Computation and Simulation. DOI:10.1080/00949655.2011.572881.
Gray BR, JT Rogala and JN Houser. 2011. Treating floodplain lakes of large rivers as study units for variables that vary within lakes; an evaluation using chlorophyll a and inorganic suspended solids data from floodplain lakes of the Upper Mississippi River. River Research and Applications.
Gray BR, W Shi, JN Houser, JT Rogala, Z Guan and JL Cochran. 2010. Cumulative effects of restoration efforts on ecological characteristics of an open water area within the Upper Mississippi River. River Research and Applications
Holland MD and BR Gray. 2010. Multinomial mixture model with heterogeneous classification probabilities. Environmental and Ecological Statistics
Holland MD, G Meeden and BR Gray. 2010. A finite population Bayes procedure for censored categorical abundance data. Journal of the Indian Society of Agricultural Statistics 64: 171-175.
Smith DR, BR Gray, TJ Newton and D Nichols. 2009. Effect of imperfect detectability on adaptive and conventional sampling: simulated sampling of freshwater mussels in the Upper Mississippi River. Environmental Monitoring and Assessment 170: 499-507.
Gray, BR, D Bushek, JW Drane and D Porter. 2009. Associations between land use and Perkinsus marinus infection of eastern oysters in a high salinity, partially urbanized estuary. Ecotoxicology 18: 259-269.
Gray, BR, RJ Haro and JT Rogala. 2009. Addressing among-group variation in covariate effects using multilevel models. Environmental and Ecological Statistics 16: DOI 10.1007/s10651-009-0119-y
Li, J, BR Gray and DM Bates. 2008. An empirical study of statistical properties of variance partition coefficients for multi-level logistic regression models. Communications in Statistics - Simulation and Computation 37: 2010 – 2026
Gray, BR and MM Burlew. 2007. Estimating trend precision and power to detect trends across grouped count data. Ecology 88: 2364-2372.
Langrehr, HA, BR Gray and JA Janvrin. 2007. Evaluation of aquatic macrophyte community response to island construction in the Upper Mississippi River. Lake and Reservoir Management 23: 313-320
Gray, BR. 2005. Selecting a distributional assumption for modelling relative abundances of benthic macroinvertebrates. Ecological Modelling 185: 1-12
Gray, BR, RJ Haro, JT Rogala and JS Sauer. 2005. Modeling fingernail clam (Family: Sphaeriidae) abundance-habitat associations at two spatial scales using hierarchical count models. J Freshwater Biology 50: 715-729
Links:
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.umesc.usgs.gov/staff/bios/brg0.html
Page Contact Information: Contacting the Upper Midwest Environmental Sciences Center
Page Last Modified:
January 11, 2013
