Office of Research and Development Publications

Records 1 to 89 of 89

Bradford, D., R. Knapp, D. Sparling, M. Nash, K. Stanley, N. Tallent-Halsell, L. McConnell, AND S. Simonich. Pesticide Distributions and Population Declines of California, USA Alpine Frogs, Rana Muscosa and Rana Sierrae. Presented at 7th World Congress of Herpetology, Vancouver, BC, CANADA, August 08 - 14, 2012.
Boykin, K., W. Kepner, D. Bradford, R. Guy, D. Kopp, A. Leimer, E. Samson, F. East, A. Neale, AND K. Gergely. Quantifying and Mapping Habitat-Based Biodiversity Metrics Within an Ecosystem Services Framework. Presented at ACES Conference, Ft. Lauderdale, FL, December 10 - 14, 2012.
BRADFORD, D. F., E. M. HEITHMAR, N. G. TALLENT-HALSELL, G. MOMPLAISIR, C. G. ROSAL, K. E. VARNER, M. S. NASH, AND L. A. RIDDICK. Temporal Patterns and Sources of Atmospherically Deposited Pesticides in Alpine Lakes of the Sierra Nevada, California , USA. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 44(10):4609-4614, (2010).
Nash, M., D. Bradford, J. Wickham, AND T. Wade. Detecting Change in Landscape Greenness over Large Areas: An Example for New Mexico, USA. REMOTE SENSING OF ENVIRONMENT. Elsevier Science Ltd, New York, NY, 150(0):152-162, (2014).
Boykin, K., W. Kepner, D. Bradford, R. Guy, D. Kopp, A. Leimer, E. Samson, F. East, A. Neale, AND K. Gergely. A National Approach for Mapping and Quantifying Habitat-based Biodiversity Metrics Across Multiple Spatial Scales . K. Boykin (ed.), ECOLOGICAL INDICATORS. Elsevier Science Ltd, New York, NY, 33(0):139-147, (2013).
Bradford, D., K. Stanley, N. Tallent, D. Sparling, M. Nash, R. Knapp, L. McConnell, AND S. Simonich. Temporal and Spatial Variation of Atmospherically Deposited Organic Contaminants at High Elevation in Yosemite National Park, California, USA. E. Zeng (ed.), ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Society of Environmental Toxicology and Chemistry, Pensacola, FL, 32(0):517-525, (2013).
BRADFORD, D. F., J. L. Kramer, S. L. Gerstenberger, N. G. Tallent-Halsell, AND M. S. NASH. Mercury in Tadpoles Collected from Remote Alpine Sites in the Southern Sierra Nevada Mountains, California, USA. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY. Springer, New York, NY, 62:135-140, (2011).
Bradford, D F., J. R. Jaeger, AND S. A. Shanahan. DISTRIBUTIONAL CHANGES AND POPULATION STATUS FOR AMPHIBIANS IN THE EASTERN MOJAVE DESERT. Western North American Naturalist 65(4):462-472, (2005).
MOMPLAISIR, G., C. G. ROSAL, E. M. HEITHMAR, K. E. VARNER, L. A. RIDDICK, D. F. BRADFORD, AND N. G. TALLENT-HALSELL. Development of a Solid Phase Extraction Method for Agricultural Pesticides in Large-Volume Water Samples. Journal of Separation Science. Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany, 81:1380-1386, (2010).
OLSON, D., P. ANDERSON, C. FRISSELL, H. WELSH, AND D. F. BRADFORD. BIODIVERSITY MANAGEMENT APPROACHES FOR STREAM-RIPARIAN AREAS: PERSPECTIVES FOR PACIFIC NORTHWEST HEADWATER FORESTS, MICROCLIMATES, AND AMPHIBIANS. FOREST ECOLOGY AND MANAGEMENT. Elsevier Science Ltd, New York, NY, 246:81-107, (2007).
Samson, E. A., W. G. KEPNER, A. K. Leimer, R. K. Guy, K. G. Boykin, B. G. BIERWAGEN, AND D. F. BRADFORD. Evaluating Biodiversity Response toForecasted Land Use Change: A Case Study in the South Platte River Basin, Colorado. Fourth Interagency Conference on REsearch in the Watersheds, Fairbanks, AK, September 25 - 30, 2011. C. Nicolas Medley, Glenn Patterson, and Melanie J. Parker (ed.), USGS STATUS AND TRENDS REPORT 2003. U.S. Geological Survey, Washington, DC, 56-62, (2011).
BRADFORD, D. F., K. Stanley, L. L. McConnell, N. G. TALLENT-HALSELL, M. S. NASH, AND S. M. Simonich. Spatial Patterns of Atmospherically Deposited Organic Contaminants at High Elevation in the Southern Sierra Nevada Mountains, California. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Society of Environmental Toxicology and Chemistry, Pensacola, FL, 29(5):10-56-1066, (2010).
Hekkala, E. R., R. Saumure, J. R. Jaeger, H. Herrmann, M. Sredl, M. Culver, D. F. BRADFORD, D. Drabeck, AND M. J. Blum. Resurrecting an Extinct Species: Archival DNA, Taxonomy, and Conservation of the Vegas Valley Leopard Frog. CONSERVATION GENETICS. Springer Science+Business Media, 12:1379-1385, (2011).
KEPNER, W. G., K. G. Boykin, D. F. BRADFORD, A. C. NEALE, A. K. Leimer, AND K. J. Gergely. Biodiversity Metrics. U.S. Environmental Protection Agency, Washington, DC, EPA/600/F-11/006, 2011.
BRADFORD, D. F., R. A. Knapp, D. W. Sparling, M. S. NASH, K. A. Stanley, N. G. TALLENT-HALSELL, L. L. McConnell, AND S. M. Simonich. Pesticide Distributions and Population Declines of California Alpine Frogs, Rana Muscosa and Rana Sierrae. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Society of Environmental Toxicology and Chemistry, Pensacola, FL, 30(3):682-691, (2011).
BRADFORD, D. F., K. Stanley, L. McConnell, N. G. TALLENT-HALSELL, M. S. NASH, AND S. Simonich. Spatial Patterns of Atmospherically Deposited Organic Contaminants at High Elevation in the Southern Sierra Nevada Mountains, California . Presented at Society for Environmental Toxicology and Chemistry 2010 Annual Meeting, Portland, OR, November 07 - 11, 2010.
BRADFORD, D. F., N. G. TALLENT-HALSELL, K. Stanley, L. McConnell, D. Sparling, M. S. NASH, S. Simonich, AND R. Knapp. Pesticides and Population Declines of California Alpine Frogs. Presented at Society for Environmental Toxicology and Chemistry, 2010 Annual Meeting, Portland, OR, November 07 - 11, 2010.
Boykin, K. G., W. G. KEPNER, D. F. BRADFORD, R. K. Guy, M. T. Calkins, K. J. Gergely, AND A. C. NEALE. Mapping Biodiversity Metrics Representing Ecosystem Services at the Landscape Scale in the American Southwest. Presented at American Association of Geographer 2010 Annual Meeting, Washington, DC, April 11 - 18, 2010.
Olah-Hemmings, V., J. R. Jaeger, M. J. Sredl, M. A. Schlaepfer, R. D. Jennings, C. A. Drost, D. F. BRADFORD, AND B. R. Riddle. Phylogeography of Declining Relict and Lowland Leopard Frogs in the Desert Southwest of North America. JOURNAL OF ZOOLOGY. Oxford University Press, Cary, NC, 280:343-354, (2010).
BRADFORD, D. F. Spatial Patterns of Airborne Pesticides in the Alpine Habitat of a Declining California Amphibian, The Mountain Yellow-Legged Frog. Presented at Sierra Nevada Alliance Workshop on State of Sierra Frogs, Sacramento, CA, July 24, 2008.
BRADFORD, D. F., K. Stanley, L. McConnell, N. G. TALLENT-HALSELL, S. Simonich, R. Knapp, AND M. S. NASH. Spatial Patterns of Airborne Pesticides in the Alpine Habitat of a Declining Calfornia Amphibian, The Mountain Yellow-Legged Frog. Presented at California-Nevada Amphibian Populations Task Force Conference, San Diego, CA, January 10 - 11, 2008.
Boykin, K., D. F. BRADFORD, AND W. G. KEPNER. Presentation--HABITAT DISTRIBUTION MODELS FOR 37 VERTEBRATE SPECIES IN THE MOJAVE DESERT ECOREGION OF NEVADA, ARIZONA, AND UTAH. Presented at 2008 Annual Conference, Miami, FL, November 08 - 12, 2008.
Boykin, K., D. F. BRADFORD, AND W. G. KEPNER. HABITAT DISTRIBUTION MODELS FOR 37 VERTEBRATE SPECIES IN THE MOJAVE DESERT ECOREGION OF NEVADA, ARIZONA, AND UTAH. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-08/117, 2008.
Prior-Magee, J., K. Boykin, D. F. BRADFORD, W. G. KEPNER, J. Lowry, D. Schrupp, K. Thomas, AND B. Thompson. ECOREGIONAL GAP ANALYSIS OF THE SOUTHWESTERN UNITED STATES: THE SOUTHWEST REGIONAL GAP ANALYSIS PROJECT FINAL REPORT. USGS, Corvallis, OR, 2007.
BRADFORD, D. F., E. M. HEITHMAR, N. G. TALLENT-HALSELL, G. MOMPLAISIR, C. G. ROSAL, K. E. VARNER, L. A. RIDDICK, AND M. S. NASH. Temporal Patterns of Airborne Pesticides in Alpine Lakes of the Sierra Nevada, California. Presented at Society for Environmental Toxicology and Chemistry, Tampa, FL, November 16 - 20, 2008.
BRADFORD, D. F., N. G. TALLENT-HALSELL, E. M. HEITHMAR, G. MOMPLAISIR, C. G. ROSAL, M. S. NASH, K. E. VARNER, AND L. A. RIDDICK. Temporal and Spatial Patterns of Airborne Contaminants Relative to Amphibian Population in Sequoia and Kings Canyon National Parks, California. Presented at Sierra Nevada - Southern Cascades Contaminants Workshop, Three Rivers, CA, April 08 - 09, 2009.
Stanley, K., S. Simonich, D. F. BRADFORD, C. Davidson, AND N. G. TALLENT-HALSELL. COMPARISON OF PRESSURIZED LIQUID EXTRACTION AND MATRIX SOLID PHASE DISPERSION FOR THE MEASUREMENT OF SEMI-VOLATILE ORGANIC COMPOUND ACCUMULATION IN TADPOLES. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Society of Environmental Toxicology and Chemistry, Pensacola, FL, 28(10):2038-2043, (2009).
BRADFORD, D. F., N. G. TALLENT-HALSELL, K. Stanley, L. McConnell, D. Sparling, M. S. NASH, S. Simonich, AND R. Knapp. Airborne Pesticides as an Unlikely Cause for Population Declines of Alpine Frogs in the Sierra Nevada, California. Presented at American Society of Ichtyologists and Herpetologists, Portland, OR, July 22 - 27, 2009.
KEPNER, W. G. AND D. F. BRADFORD. THE NEVADA GEOSPATIAL DATA BROWSER. Presented at United States Geological Survey, Henderson, NV, May 21, 2008.
Bradford, D F. AMPHIBIAN DECLINES AND ENVIRONMENTAL CHANGE IN THE EASTERN "MOJAVE DESERT". Conference Proceedings, Spring-fed Wetlands: Important Scientific and Cultural Resources of Intermountain Region, Las Vegas, NV, May 07 - 09, 2003. D.W. Sada & S.E. Sharpe (ed.), Desert Research Institute, Reno, NV, 41210, (2004).
BOYKIN, K., D. F. BRADFORD, AND W. G. KEPNER. HABITAT DISTRIBUTION MODELS FOR 37 VERTEBRATE SPECIES IN T HE MOJAVE DESERT ECOREGION OF NEVADA, ARIZONA, AND UTAH. Presented at Clark County Desert Conservation Program Coordination Meeting, Henderson, NV, October 18, 2007.
STANLEY, K., R. HUBER, C. DAVIDSON, D. F. BRADFORD, N. G. TALLENT-HALSELL, AND S. SIMONICH. EXPOSURE OF AMPHIBIANS TO SEMI-VOLATILE ORGANIC COMPOUNDS IN THE SIERRA NEVADA MOUNTAINS AND CALIFORNIA CASCADES: RELATIONSHIP BETWEEN TADPOLE TISSUE AND SEDIMENT CONCENTRATIONS. Presented at SETAC, Milwaukee, WI, November 11 - 15, 2007.
FELLERS, G. M., D. F. BRADFORD, D. PRATT, AND L. WOOD. DEMISE OF TRANSLOCATED POPULATIONS OF MOUNTAIN YELLOW-LEGGED FROGS (RANA MUSCOSA)IN THE SIERRA NEVADA MOUNTAINS OF CALIFORNIA. Herpetological Conservation and Biology. Herpetological Conservation and Biology, Texarkana, TX, 2(1):5-21, (2007).
BOYKIN, K., D. F. BRADFORD, AND W. G. KEPNER. HABITAT DISTRIBUTION MODELS FOR 37 VERTEBRATE SPECIES ADDRESSED BY THE MULTI-SPECIES HABITAT CONSERVATION PLAN OF CLARK COUNTY, NEVADA. Presented at National Gap Analysis Conference 2007, Asheville, NC, September 10 - 13, 2007.
BRADFORD, D. F., E. M. HEITHMAR, N. G. TALLENT-HALSELL, G. MOMPLAISIR, C. G. ROSAL, L. A. RIDDICK, AND K. E. VARNER. TEMPORAL PATTERNS OF AIRBORNE PESTICIDES IN THE HABITATE OF THE MOUNTAIN YELLOW-LEGGED FROG IN THE SOUTHERN SIERRA NEVADA. Presented at Annual Meeting of California-Nevada Amphibian Populations Task Force, Las Vegas, NV, January 18 - 20, 2007.
JAEGER, J., D. F. BRADFORD, AND R. BRETT. POPULATION STRUCTURE OF THE RED-SPOTTED TOAD, BUFO PUNCTATUS, IN A NATURALLY FRAGMENTED DESERT LANDSCAPE. Presented at Annual Meeting of California-Nevada Amphibian Poplulations Task Force, Las Vegas, NV, January 18 - 20, 2007.
HEMMINGS, V., J. JAEGER, M. SREDL, M. SCHLAEPFER, R. JENNINGS, C. PAINTER, D. F. BRADFORD, AND R. BRETT. PHYLOGEOGRAPHY OF RANA YAVAPAIENSIS AND RANA ONCA: PRELIMINARY FINDINGS WITH CONSERVATION IMPLICATIONS. Presented at Annual Meeting of California-Nevada Amphibian Populations Task Force, Las Vegas, NV, January 18 - 20, 2007.
BRADFORD, D. F., E. M. HEITHMAR, L. MCCONNELL, G. MOMPLAISIR, L. A. RIDDICK, C. G. ROSAL, S. SIMONICH, D. SPARLING, K. STANLEY, N. G. TALLENT-HALSELL, AND K. E. VARNER. AIRBORNE PESTICIDES AND POPULATION DECLINES OF A CALIFORNIA ALPINE FROG. Presented at Environmental Biology Seminar, Las Vegas, NV, February 14, 2007.
BRADFORD, D. F., E. M. HEITHMAR, K. STANLEY, L. MCCONNELL, D. SPARLING, S. SIMONICH, N. G. TALLENT-HALSELL, G. MOMPLAISIR, C. G. ROSAL, L. A. RIDDICK, AND K. E. VARNER. TEMPORAL AND SPATIAL PATTERNS OF AIRBORNE PESTICIDES IN THE ALPINE ENVIRONMENT OF A DECLINING CALIFORNIA AMPHIBIAN, THE MOUNTAIN YELLOW-LEGGED FROG. Presented at Understanding Agriculture's Effects on Amphibians and Reptiles in a Changing World, St. Louis, MO, February 06 - 08, 2007.
STANLEY, K., C. DAVIDSON, D. F. BRADFORD, S. SIMONICH, AND N. G. TALLENT-HALSELL. MEASUREMENT OF SEMI-VOLATILE ORGANIC CONTAMINANTS IN TADPOLES OF THE CALIFORNIA CASCADE AND SIERRA NEVADA MOUNTAINS. Presented at SETAC Conference, Montreal, QC, CANADA, November 05 - 09, 2006.
BRADFORD, D. F., E. M. HEITHMAR, G. MOMPLAISIR, C. G. ROSAL, N. G. TALLENT-HALSELL, L. A. RIDDICK, AND K. E. VARNER. TEMPORAL VARIATION IN PESTICIDE LEVELS IN SURFACE WATERS OF THE SOUTHERN NEVADA, CALIFORNIA. Presented at Workshop: Knowledge, Uncertainties and Research Needs in Evaluationg the Role of Pesticides in Amphibian Population Declines in California and Globally, Society for Conservation Biology, San Jose, CA, June 24, 2006.
DAVIDSON, C. AND D. F. BRADFORD. KNOWLEDGE, UNCERTAINTIES AND RESEARCH NEEDS IN EVALUATIONG THE ROLE OF PESTICIDES IN AMPHIBIAN POPULATION DECLINES IN CALIFORNIA AND GLOBALLY. Presented at Society for Conservation Biology Annual Meeting, San Jose, CA, June 24 - 28, 2006.
KEPNER, W. G., T. D. SAJWAJ, D. F. BRADFORD, AND E. J. EVANSON. THE NEVADA GEOSPATIAL DATA BROWSER. Presented at Nationa Gap Analysis Conference and Interagency Symposium, Reno, NV, December 06 - 08, 2005.
KEPNER, W. G., T. D. SAJWAJ, D. F. BRADFORD, AND E. J. EVANSON. THE NEVADA GEOSPATIAL DATA BROWSER: A SPATIAL DATA ARCHIVE FOR THE SOUTHWEST REGIONAL GAP ANALYSIS PROJECT. Presented at Nationa Gap Analysis Conference and Interagency Symposium, Reno, NV, December 06 - 08, 2005.
BRADFORD, D. F. RENO, NV, JANUARY 15, 2004: FACTORS IMPLICATED IN AMPHIBIAN POPULATION DECLINES IN THE UNITED STATES. Presented at Annual Meeting of Declining Amphibian Task Force, Reno, NV, January 15 - 16, 2004.
KEPNER, W. G., D. F. BRADFORD, AND T. D. SAJWAJ. AN INTER-AGENCY APPROACH FOR DETERMINING REGIONAL LAND COVER AND SPECIES HABITAT CONSERVATION STATUS IN THE AMERICAN SOUTHWEST: THE SOUTHWEST REGIONAL GAP ANALYSIS PROJECT. Presented at EPA 2005 Science Forum, Washington, DC, May 16 - 18, 2005.
JAEGER, J. R., D. F. BRADFORD, C. DROST, AND L. GELCZIS. IMPLICATIONS OF THE DISCOVERY OF RANA YAVAPAIENSIS IN THE WESTERN GRAND CANYON TO THE CONSERVATION STRATEGY FOR RANA ONCA. Presented at World Conservation Union, Declining Amphilbian Populations Task Force, CA/NV Working Group, Berkeley, CA, January 13 - 14, 2005.
KEPNER, W. G., T. D. SAJWAJ, D. T. HEGGEM, D. F. BRADFORD, AND E. J. EVANSON. NEVADA GEOSPATICAL DATA BROWSER. U.S. Environmental Protection Agency, Washington, DC, EPA/600/C-05/005, 2005.
Jaeger, J R., B. R. Riddle, AND D F. Bradford. CRYPTIC NEOGENE VICARIANCE AND QUATERNARY DISPERSAL OF THE RED-SPOTTED TOAD (BUFO PUNCTATUS) INSIGHTS ON THE EVOLUTION OF NORTH AMERICAN WARM DESERT BIOTAS. MOLECULAR ECOLOGY. Blackwell Publishing, Malden, MA, 14:3033-3048, (2005).
Bradford, D F., J R. Jaeger, AND R. D. Jennings. POPULATION STATUS AND DISTRIBUTION OF A DECIMATED AMPHIBIAN, THE RELICT LEOPARD FROG (RANA ONCA). SOUTHWESTERN NATURALIST 49(2):218-228, (2004).
Nash, M S., D F. Bradford, S E. Franson, A C. Neale, W. G. Whitford, AND D T. Heggem. LIVESTOCK GRAZING EFFECTS ON ANT COMMUNITIES IN THE EASTERN MOJAVE DESERT, USA. ECOLOGICAL INDICATORS 4(3):199-213, (2004).
Bradford, D F., M S. Nash, W G. Whitford, A C. Neale, AND D T. Heggem. ANT AND BIRD SPECIES ASSEMBLAGES AS INDICATORS OF ECOLOGICAL INTEGRITY IN GREAT BASIN RANGELANDS. Presented at Great Basin Biological Research Conference, Reno, NV, October 14-16, 1999.
Carey, C., D F. Bradford, J. L. Brunner, J. P. Collins, E. W. Davidson, J. E. Longcore, A. P. Pessier, AND D. M. Schock. BIOTIC FACTORS IN AMPHIBIAN POPULATION DECLINES. 1stChapter 6, Greg Linder (ed.), Amphibian Decline: An Integrated Analysis of Multiple Stressor Effects. SETAC Press, Pensacola, FL, , 153-208, (2004).
Nash, M S., W G. Whitford, D F. Bradford, S E. Franson, A C. Neale, AND D T. Heggem. ANT COMMUNITIES AND LIVESTOCK GRAZING IN THE GREAT BASIN, USA. JOURNAL OF ARID ENVIRONMENTS 49(4):695-710, (2001).
Jaeger, J R., B. R. Riddle, R. D. Jennings, AND D F. Bradford. EVIDENCE OF PHYLOGENETICALLY DISTINCT LEOPARD FROGS (RANA ONCA) FROM THE BORDER REGION OF NEVADA, UTAH, AND ARIZONA. COPEIA 2(1):339-354, (2001).
Bradford, D F., A C. Neale, M S. Nash, D. W. Sada, AND J R. Jaeger. HABITAT PATCH OCCUPANCY BY THE TOADS (BUFO PUNCTATUS) IN A NATURALLY FRAGMENTED, DESERT LANDSCAPE. ECOLOGY 84(4):1012-1023, (2003).
Bradford, D F., E M. Heithmar, C L. Cross, B. Gentry, G M. Momplaisir, M S. Nash, N G. TallentHalsell, L A. Riddick, C G. Rosal, AND K E. Varner. DISTRIBUTIONS OF AIRBORNE AGRICULTURAL CONTAMINANTS RELATIVE TO AMPHIBIAN POPULATIONS IN THE SOUTHERN SIERRA NEVADA, CA. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-01/085 (NTIS PB2002-102156), 2001.
Nash, M S. AND D F. Bradford. PARAMETRIC AND NON PARAMETRIC (MARS: MULTIVARIATE ADDITIVE REGRESSION SPLINES) LOGISTIC REGRESSIONS FOR PREDICTION OF A DICHOTOMOUS RESPONSE VARIABLE WITH AN EXAMPLE FOR PRESENCE/ABSENCE OF AMPHIBIANS. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-01/081 (NTIS PB2002-102297), 2001.
Brooks, P. D., C. M. O'Reilly, S A. Diamond, D. H. Campbell, R. A. Knapp, D F. Bradford, P. S. Corn, B. Hossack, AND K. E. Tonnessen. SPATIAL AND TEMPORAL VARIABILITY IN THE AMOUNT AND SOURCE OF DISSOLVED ORGANIC CARBON: IMPLICATIONS FOR UV EXPOSURE IN AMPHIBIAN HABITATS. ECOSYSTEMS 8:478-487, (2005).
Bradford, D F. FACTORS IMPLICATED IN AMPHIBIAN POPULATION DECLINES IN THE UNITED STATES. Presented at Declining Amphibian Populations Task Force, Southwestern U.S. Working Group, Tucson, AZ, March 10, 2003.
Bradford, D F., R. D. Jennings, AND J R. Jaeger. RANA ONCA COPE 1875 RELICT LEOPARD FROG. Chapter 14, Michael Lannoo (ed.), Status and Conservation of US Amphibians. University of California Press at Berkeley, Berkeley, CA, , 567-568, (2005).
Bradford, D F. FACTORS IMPLICATED IN AMPHIBIAN POPULATION DECLINES IN THE UNITED STATES. Chapter 23, Michael Lannoo (ed.), Lannoo, M.J. (ed) Declining Amphibians: A United States Repsonse to the Global Problem. University of California Press at Berkeley, Berkeley, CA, , 915-951, (2005).
Wickham, J D., J. Wu, AND D F. Bradford. STRESSOR DATA SETS FOR STUDYING SPECIES DIVERSITY AT LARGE SPATIAL SCALES. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-95/018 (NTIS PB95-249462), 1995.
Canterbury, G. E., T E. Martin, D. R. Petit, L. J. Petit, AND D F. Bradford. BIRD COMMUNITIES AND HABITAT AS ECOLOGICAL INDICATORS OF FOREST CONDITION IN REGIONAL MONITORING. CONSERVATION BIOLOGY 14(2):544 - 558, (2000).
Bradford, D F. SPATIAL DISTRIBUTION OF DESERT SPRINGS AS A FACTOR DETERMINING OCCUPACY OF SITES BY AMPHIBIANS IN THE SOUTHERN NEVADA REGION. Presented at Desert Fishes Council Annual Meeting, Death Valley National Park, CA, November 20-22, 1997.
Bradford, D F., A C. Neale, M S. Nash, D. W. Sada, AND J R. Jaeger. METAPOPULATION PROCESSES OF INFINITE DISPERSAL: HABITAT PATCH OCCUPANCY BY TOADS (BUFO PUNCTATUS) IN A NATURALLY FRAGMENTED DESERT LANDSCAPE. Presented at Mojave Desert Science Symposium, Redlands, CA, November 16-18, 2004.
Bradford, D F. AND W G. Kepner. AN APPROACH FOR DETERMINING REGIONAL LAND COVER AND SPECIES HABITAT DISTRIBUTIONS IN THE AMERICAN SOUTHWEST: THE SOUTHWEST REGIONAL GAP ANALYSIS PROJECT. Presented at Mojave Desert Science Symposium, Redlands, CA, November 16-18, 2004.
Kepner, W G., D F. Bradford, AND T. D. Sajwaj. AN APPROACH FOR DETERMINING REGIONAL LAND COVER AND SPECIES HABITAT CONSERVATION STATUS IN THE AMERICAN SOUTHWEST: THE SOUTHWEST REGIONAL GAP ANALYSIS PROJECT. Presented at 36th Annual Meeting of the Desert Fishes Council, Tucson, AZ, November 11-14, 2004.
Bradford, D F. HABITAT PATCH ISOLATION AND OCCUPANCY BY THE RED-SPOTTED TOAD (BUFO PUNCTATUS) IN A NATURALLY FRAGMENTED LANDSCAPE. Presented at American Society of Ichthyologists & Herpetologists, Pennslyvania, PA, June 25-30, 1999.
Jaeger, J R., B. R. Riddle, AND D F. Bradford. PHYLOGEOGRAPHY OF THE WIDELY DISTRIBUTED, DESERT-ADAPTED TOAD (BUFO PUNCTATUS). Presented at American Society of Ichthyologist & Herpetologists, Penn State, PA, June 25-30, 1999.
Bradford, D F. LOCAL SCALE FACTORS DETERMINE HABITAT PATCH OCCUPANCY BY RED-SPOTTED TOADS IN A NATURALLY FRAGMENTED DESERT LANDSCAPE. Presented at The Wildlife Society Annual Meeting, Calgary, CN, September 18-22, 2004.
Jaeger, J R., D F. Bradford, R. D. Jennings, AND B. R. Riddle. STATUS OF THE RELICT LEOPARD FROG (RANA ONCA): OUR LIMITED UNDERSTANDING OF THE DISTRIBUTION, SIZE, AND DYNAMICS OF EXTANT AND RECENTLY EXTINCT POPULATIONS. Presented at Annual Meeting of Declining Amphibian Task Force, Reno, NV, January 15-16, 2004.
Bradford, D F., A C. Neale, M S. Nash, D. W. Sada, AND J R. Jaeger. METAPOPULATION PROCESSES OR INFINITE DISPERSAL?: HABITAT PATCH OCCUPANCY BY TOADS (BUFO PUNCTATUS) IN A NATURALLY FRAGMENTED DESERT LANDSCAPE. Presented at Annual Meeting of Declining Amphibian Task Force, Reno, NV, January 15-16, 2004.
Bradford, D F., A C. Neale, M S. Nash, D. W. Sada, AND J R. Jaeger. METAPOPULATION PROCESSES OR INFINITE DISPERSAL?: HABITAT PATCH OCCUPANCY BY TOADS (BUFO PUNCTATUS) IN A NAUTRALLY FRAGMENTED DESERT LANDSCAPE. Presented at Annual Meeting of International Association for Landscape Ecology, Las Vegas, NV, March 31-April 3, 2004.
Bradford, D F., A C. Neale, M S. Nash, D. W. Sada, AND J R. Jaeger. METAPOPULATION PROCESSES OF INFINITE DISPERSAL?: HABITAT PATCH OCCUPANCY BY TOADS (BUFO PUNCTATUS) IN A NATURALLY FRAGMENTED DESERT. Presented at Annual Meeting of Desert Fishes Council, Death Valley National Park, NV, November 22-23, 2003.
Sajwaj, T. D., W G. Kepner, AND D F. Bradford. TESTING TREE-CLASSIFIER VARIANTS AND ALTERNATE MODELING METHODOLOGIES IN THE EAST GREAT BASIN MAPPING UNIT OF THE SOUTHWEST REGIONAL GAP ANALYSIS PROJECT (SW REGAP). Presented at 13th Annual National Gap Analysis Program Meeting, Fort Collins, CO, October 7-10, 2003.
Sajwaj, T. D., W G. Kepner, D F. Bradford, AND C T. Herndon. SACRIFICING THE ECOLOGICAL RESOLUTION OF VEGETATION MAPS AT THE ALTAR OF THEMATIC ACCURACY: ASSESSED MAP ACCURACIES FOR HIERARCHICAL VEGETATION CLASSIFICATIONS IN THE EASTERN GREAT BASIN OF THE SOUTHWEST REGIONAL GAP ANALYSIS PROJECT (SW REGAP). Presented at 13th Annual National Gap Analysis Program Meeting, Fort Collins, CO, October 7-10, 2003.
Rosal, C G., L A. Riddick, E M. Heithmar, G M. Momplaisir, K E. Varner, P. L. Ferguson, D F. Bradford, AND N G. TallentHalsell. ANALYSIS OF LOW-LEVEL PESTICIDES FROM HIGH-ELEVATION LAKE WATERS BY LARGE VOLUME INJECTION GCMS. Presented at Pittsburg Conference 2003, Orlando, FL, March 13, 2003.
Varner, K E., G M. Momplaisir, N G. TallentHalsell, D F. Bradford, P. L. Ferguson, L A. Riddick, C G. Rosal, AND E M. Heithmar. THE CHALLENGE OF ACQUIRING ALPINE LARGE VOLUME LAKE WATER SAMPLES FOR ULTRA TRACE LEVEL ANALYSIS. Presented at On-Site 11th International Conference, Phoenix, AZ, January 21-24, 2003.
Momplaisir, G M., K E. Varner, E M. Heithmar, C G. Rosal, L A. Riddick, P. L. Ferguson, B. Gentry, D F. Bradford, AND N G. TallentHalsell. DETERMINATION OF ULTRATRACE CONCENTRATIONS OF AGRICULTURAL PESTICIDES IN WATER USING SOLID-PHASE EXTRACTION AND ANALYSIS BY GC/MS. Presented at Pittsburgh Conference on Analytical Chemistry and Applied Spectrometry, Orlando, FL, March 9-14, 2003.
Rosal, C G., L A. Riddick, E M. Heithmar, G M. Momplaisir, K E. Varner, P. L. Ferguson, D F. Bradford, AND N G. TallentHalsell. ANALYSIS OF LOW-LEVEL PESTICIDES FROM HIGH-ELEVATION LAKE WATERS BY LARGE-VOLUME INJECTION GCMS. Presented at Pittsburgh Confernece on Anlytical Chemistry and Applied Spectroscopy 2003, Orlando, FL, March 9-14, 2003.
Bradford, D F. FACTORS IMPLICATED IN AMPHIBIAN POPULATION DECLINES IN THE US, AND AN EVALUATION OF THE CASE FOR INVASIVE SPECIES. Presented at Annual meeting of the Society for Northwestern Vertebrate Biology, Hood River, OR, April 4, 2002.
Jaeger, J R., B. R. Riddle, AND D F. Bradford. WHEN A PHYLOGENETIC TRICHOTOMY MAKES SENSES: PHYLOGEOGRAPHY OF BUFO PUNCTATUS AND THE EVOLUTION OF THE WARM DESERTS. Presented at Annual meeting of the Wildlife Society, Western Section, Visalia, CA, March 7-8, 2002.
Bradford, D F. FACTORS ADVERSELY AFFECTING AMPHIBIAN POPULATIONS IN THE US. Presented at Annual Meeting of the Wildlife Society, Western Section, Visalia, CA, March 7-8, 2002.
Jaeger, J R., B. R. Riddle, R. D. Jennings, AND D F. Bradford. EVIDENCE FOR PHYLOGENETICALLY DISTINCT LEOPARD FROGS (RANA ONCA) FROM THE BORDER REGION OF NEVADA, UTAH, ARIZONA. Presented at The Annual Meeting of the Wildlife Society, Western Section, Sacramento, CA, February 22-25, 2001.
Bradford, D F., A C. Neale, M S. Nash, D. W. Sada, J R. Jaeger, AND B. R. Riddle. HABITAT PATCH OCCUPANCY BY THE RED-SPOTTED TOAD (BUFO PUNCTATUS) IN A NATURALLY FRAGMENTED, DESERT LANDSCAPE. Presented at The Annual Meeting of the Wildlife Society, Western Section, Sacramento, CA, February 22-25, 2001.
Bradford, D F., A C. Neale, M S. Nash, D. W. Sada, AND J R. Jaeger. MOJAVE DESERT SPRING: THE AMPHIBIAN POINT OF VIEW. Presented at Spring-fed Wetlands: Important Scientific and Cultural Resources of the Intermountain Region, Las Vegas, NV, May 5-7, 2002.
Jaeger, J R., B. R. Riddle, AND D F. Bradford. PHYLOGEOGRAPHY OF BUFO PUNCTATUS: LONG TERM EVOLUTION WITHIN THE WARM DESERTS OF NORTH AMERICA AND LATE QUATERNARY RANGE SHIFTING. Presented at Annual meeting of the American Society of Ichthyologists and Herpetologists, Kansas City, MO, July 3-8, 2002.
Bradford, D F. AND R. A. Knapp. ALIEN SPECIES: THEIR ROLE IN AMPHIBIAN POPULATION DECLINES AND RESTORATION. Presented at International Symposium on Declining Amphibian Populations, Indianapolis, IN, June 30-31, 2001.