Jump to main content or area navigation.

Contact Us

Exposure Research

Records 1 to 87 of 87
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).
2014
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).
2013
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).
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.
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., 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., 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).
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).
2010
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).
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.
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.
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., 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).
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., 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).
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.
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, 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.
2008
KEPNER, W. G. AND D. F. BRADFORD. THE NEVADA GEOSPATIAL DATA BROWSER. Presented at United States Geological Survey, Henderson, NV, May 21, 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.
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.
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.
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., 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.
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.
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).
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).
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
2005
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., 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 S. A. Shanahan. DISTRIBUTIONAL CHANGES AND POPULATION STATUS FOR AMPHIBIANS IN THE EASTERN MOJAVE DESERT. Western North American Naturalist 65(4):462-472, (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).
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.
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).
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).
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.
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. 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.
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., 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. 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.
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., 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., 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).
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.
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.
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.
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.
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.
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., 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., 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, 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.
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.
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.
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.
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.
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.
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.
2001
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.
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).
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.
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.
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, 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.
2000
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).
1999
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.
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.
1998
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.
1995
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.


Jump to main content.