James D Nichols
Affiliation: U.S. Geological Survey
- Sampling design trade-offs in occupancy studies with imperfect detection: examples and softwareLarissa L Bailey
U S Geological Survey, Patuxent Wildlife Research Center, 12100 Beech Forest Road, Laurel, Maryland 20708 4017, USA
Ecol Appl 17:281-90. 2007..We illustrate the utility of program GENPRES using an amphibian example from Greater Yellowstone National Park, U.S.A...
- Monitoring for conservationJames D Nichols
USGS, Patuxent Wildlife Research Center, Laurel, MD 20708, USA
Trends Ecol Evol 21:668-73. 2006..Corresponding changes in monitoring focus and design would lead to substantial increases in the efficiency and usefulness of monitoring results in conservation...
- Adult tree swallow (Tachycineta bicolor) survival on the polychlorinated biphenyl-contaminated Housatonic River, Massachusetts, USAChristine M Custer
U S Geological Survey, Upper Midwest Environmental Sciences Center, 2630 Fanta Reed Road, La Crosse, Wisconsin 54603, USA
Environ Toxicol Chem 26:1056-65. 2007..Percentage lipid was positively correlated with total PCBs in eggs. Survival rates were similar among swallows with brown versus blue plumage...
- Occupancy estimation and modeling with multiple states and state uncertaintyJames D Nichols
United States Geological Survey, Patuxent Wildlife Research Center, Laurel, Maryland 20708, USA
Ecology 88:1395-400. 2007..Estimates of owl reproductive rate were larger than naïve estimates, indicating the importance of appropriately accounting for uncertainty in detection and state classification...
- Seeking a second opinion: uncertainty in disease ecologyBrett T McClintock
USGS Patuxent Wildlife Research Center, Laurel, MD 20708, USA
Ecol Lett 13:659-74. 2010..Both show that relatively simple modifications to study designs can greatly improve our understanding of complex spatio-temporal disease dynamics by rigorously accounting for uncertainty at each level of the hierarchy...
- Use of multiple dispersal pathways facilitates amphibian persistence in stream networksEvan H Campbell Grant
Northeast Amphibian Research and Monitoring Initiative, US Geological Survey Patuxent Wildlife Research Center, Laurel, MD 20708 4026, USA
Proc Natl Acad Sci U S A 107:6936-40. 2010..Our results link the movement behavior of stream salamanders to network topology, and they underscore the importance of identifying and protecting critical dispersal pathways when addressing region-wide population declines...
- Intra-guild compensation regulates species richness in desert rodents: commentJames D Nichols
USGS Patuxent Wildlife Research Center, 12100 Beech Forest Road, Laurel, Maryland 20708-4017, USA
Ecology 87:2118-21; discussion 2121-5. 2006
- Improving occupancy estimation when two types of observational error occur: non-detection and species misidentificationDavid A Miller
United States Geological Survey, Patuxent Wildlife Research Center, 12100 Beech Forest Road, Laurel, Maryland 20708, USA
Ecology 92:1422-8. 2011..When the potential for misidentification exists, researchers should consider analytical techniques that can account for this source of error, such as those presented here...
- Joint estimation of habitat dynamics and species interactions: disturbance reduces co-occurrence of non-native predators with an endangered toadDavid A W Miller
US Geological Survey, Patuxent Wildlife Research Center, Laurel, MD 20708, USA
J Anim Ecol 81:1288-97. 2012....
- On valuing patches: estimating contributions to metapopulation growth with reverse-time capture-recapture modellingJamie S Sanderlin
Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA
Proc Biol Sci 279:480-8. 2012..Finally, we discuss differences between demographic and genetic population linkage patterns for our system...
- Estimating species-specific survival and movement when species identification is uncertainJonathan P Runge
Montana Cooperative Wildlife Research Unit, Wildlife Biology Program, The University of Montana, Missoula, Montana 59812, USA
Ecology 88:282-8. 2007..The incorporation of species uncertainty in mark-recapture studies should aid future research investigating ecological concepts such as interspecific competition, niche differentiation, and spatial population dynamics in sibling species...
- A large-scale deforestation experiment: effects of patch area and isolation on Amazon birdsGoncalo Ferraz
Biological Dynamics of Forest Fragments Project, Instituto Nacional de Pesquisas da Amazonia, 69011 Manaus AM, Brazil
Science 315:238-41. 2007..From our models, we derived two metrics of species vulnerability to changes in isolation and patch area. We found a strong effect of area and a variable effect of isolation on the predicted patch occupancy by birds...
- Multiscale patterns of movement in fragmented landscapes and consequences on demography of the snail kite in FloridaJulien Martin
Florida Cooperative Fish and Wildlife Research Unit, University of Florida, Gainesville, FL 32611 0485, USA
J Anim Ecol 75:527-39. 2006..7. We hypothesize that fragmentation may decrease kite's resistance to drought by restricting exploratory behaviour...
- The relationship between species detection probability and local extinction probabilityRussell Alpizar-Jara
Departamento de Matematica, Universidade de Evora, Rua Romao Ramalho 59, 7000 671 Evora, Portugal
Oecologia 141:652-60. 2004..Both the weighted estimator suggested in this paper and the original unweighted estimator for local extinction probability performed fairly well and provided no basis for preferring one to the other...
- Temporal variability of local abundance, sex ratio and activity in the Sardinian chalk hill blue butterflyPaolo Casula
Dipartimento di Biologia Sperimentale, Sezione di Genetica, Universita degli Studi di Cagliari, Viale Poetto No 1, 09126 Cagliari, Italy
Oecologia 136:374-82. 2003..Robust design models were used successfully to provide a detailed description of the population structure and activity in this butterfly and are recommended for studies of local abundance and animal activity in the field...
- Spatio-temporal dynamics of species richness in coastal fish communitiesKyrre Lekve
Division of Zoology, Department of Biology, University of Oslo, PO Box 1050 Blindern, N-0316 Oslo, Norway
Proc Biol Sci 269:1781-9. 2002..At the regional level, exposure to the open sea plays a homogenizing role, possibly due to coastal currents and advection...
- Assessing tiger population dynamics using photographic capture-recapture samplingK Ullas Karanth
Wildlife Conservation Society India Program, Centre for Wildlife Studies, 26 2, Aga Abbas Ali Road Apt 403, Bangalore, Karnataka 560 042, India
Ecology 87:2925-37. 2006....
- Variation in probability of first reproduction of Weddell sealsGillian L Hadley
Department of Ecology, Montana State University, Bozeman, Montana 59717, USA
J Anim Ecol 75:1058-70. 2006....
- Individual quality, survival variation and patterns of phenotypic selection on body condition and timing of nesting in birdsPeter Blums
Institute of Biology, University of Latvia, Miera 3, LV 2169 Salaspils, Latvia
Oecologia 143:365-76. 2005..These associations lead to a positive covariance of these two fitness components within individuals and to the conclusion that these two traits are indeed correlates of individual quality...
- Sexual selection affects local extinction and turnover in bird communitiesPaul F Doherty
Laboratoire d Ecologie, Centre National de la Recherche Scientifique Unité Mixte de Recherche 7625, Universite Pierre et Marie Curie, 7 quai Saint Bernard, F 75252 Paris Cedex 05, France
Proc Natl Acad Sci U S A 100:5858-62. 2003..Anthropogenic factors impeding dispersal might therefore have a significant impact on the global persistence of sexually selected species...