Publications
This is a list of publications written by Patuxent employees since Patuxent opened in 1939. To search for Patuxent's publications by author or title, please click below to go to the USGS Publication Warehouse.
Filter Total Items: 8128
The mute swan, its status, behavior, and history in the U. K The mute swan, its status, behavior, and history in the U. K
For many years the mute swan has been considered a royal bird. It is a prominent resident throughout the United Kingdom (U.K.), often found on the inland waterways. Some people consider it to be a nonmigratory native bird because it doesn't tend to move large distances and doesn't often venture far from freshwater. A mute swan may often live out its life cycle in the same river valley in...
Authors
E.J.R. Lohnes
Extinction rate estimates for plant populations in revisitation studies: Importance of detectability Extinction rate estimates for plant populations in revisitation studies: Importance of detectability
Many researchers have obtained extinction-rate estimates for plant populations by comparing historical and current records of occurrence. A population that is no longer found is assumed to have gone extinct. Extinction can then be related to characteristics of these populations, such as habitat type, size, or species, to test ideas about what factors may affect extinction. Such studies...
Authors
M. Kery
Gold concentrations in abiotic materials, plants, and animals: A synoptic review Gold concentrations in abiotic materials, plants, and animals: A synoptic review
Gold (Au) is ubiquitous in the environment and mined commercially at numerous locations worldwide. It is also an allergen that induces dermatitis in sensitive individuals. Gold concentrations were comparatively elevated in samples collected near gold mining and processing facilities, although no data were found for birds and non-human mammals. Maximum gold concentrations reported in...
Authors
R. Eisler
Mute swans and their Chesapeake Bay habitats: proceedings of a symposium Mute swans and their Chesapeake Bay habitats: proceedings of a symposium
The symposium 'Mute Swans and their Chesapeake Bay Habitats,' held on June 7, 2001, provided a forum for biologists and managers to share research findings and management ideas concerning the exotic and invasive mute swan (Cygnus olar). This species has been increasing in population size and is considered by many to be a problem in regard to natural food resources in the Bay that are...
VEMAP Phase 2 bioclimatic database. I. Gridded historical (20th century) climate for modeling ecosystem dynamics across the conterminous USA VEMAP Phase 2 bioclimatic database. I. Gridded historical (20th century) climate for modeling ecosystem dynamics across the conterminous USA
Analysis and simulation of biospheric responses to historical forcing require surface climate data that capture those aspects of climate that control ecological processes, including key spatial gradients and modes of temporal variability. We developed a multivariate, gridded historical climate dataset for the conterminous USA as a common input database for the Vegetation/Ecosystem...
Authors
T.G.F. Kittel, N.A. Rosenbloom, J. Andrew Royle, Christopher Daly, W.P. Gibson, H.H. Fisher, P. Thornton, D.N. Yates, S. Aulenbach, C. Kaufman, R. McKeown, D. Bachelet, D. S. Schimel, R. Neilson, J. Lenihan, R. Drapek, D.S. Ojima, W.J. Parton, J. M. Melillo, D. W. Kicklighter, H. Tian, A. D. McGuire, M.T. Sykes, B. Smith, S. Cowling, T. Hickler, I. C. Prentice, S. Running, K.A. Hibbard, W.M. Post, A.W. King, T. Smith, B. Rizzo, F.I. Woodward
The effect of nitrogen loading on a brackish estuarine faunal community: A stable isotope approach The effect of nitrogen loading on a brackish estuarine faunal community: A stable isotope approach
Coastal ecosystems worldwide face increased nutrient enrichment from shoreline and watershed development and atmospheric pollution. We investigated the response of the faunal community of a small microtidal estuary dominated by Ruppia maritima (widgeon grass) in Maine, United States, to increased nitrogen loading using an in situ mesocosm enrichment experiment. Community response was
Authors
R.A. Keats, L.J. Osher, H.A. Neckles
Detection of Ehrlichia chaffeensis in adult and nymphal stage lone star ticks (Amblyomma americanum) from Long Island, New York Detection of Ehrlichia chaffeensis in adult and nymphal stage lone star ticks (Amblyomma americanum) from Long Island, New York
The lone star tick, Amblyomma americanum (L.), has increased in abundance in several regions of the northeastern United States, including areas of Long Island, NY. Adult and nymphal stage A. americanum collected from several sites on Long Island were evaluated for infection with Ehrlichia chaffeensis, the causative agent of human monocytic ehrlichiosis (HME), by using a nested polymerase...
Authors
T.R. Mixson, H. S. Ginsberg, S.R. Campbell, J.W. Sumner, C.D. Paddock
Capture-recapture analysis for estimating manatee reproductive rates Capture-recapture analysis for estimating manatee reproductive rates
Modeling the life history of the endangered Florida manatee (Trichechus manatus latirostris) is an important step toward understanding its population dynamics and predicting its response to management actions. We developed a multi-state mark-resighting model for data collected under Pollock's robust design. This model estimates breeding probability conditional on a female's breeding...
Authors
W. L. Kendall, C.A. Langtimm, C.A. Beck, M.C. Runge
Estimation of tiger densities in the tropical dry forests of Panna, Central India, using photographic capture-recapture sampling Estimation of tiger densities in the tropical dry forests of Panna, Central India, using photographic capture-recapture sampling
Tropical dry-deciduous forests comprise more than 45% of the tiger (Panthera tigris) habitat in India. However, in the absence of rigorously derived estimates of ecological densities of tigers in dry forests, critical baseline data for managing tiger populations are lacking. In this study tiger densities were estimated using photographic capture–recapture sampling in the dry forests of...
Authors
K.Ullas Karanth, Raghunandan S. Chundawat, James D. Nichols, N. Samba Kumar
Effects of lead-contaminated sediment and nutrition on mallard duckling brain growth and biochemistry Effects of lead-contaminated sediment and nutrition on mallard duckling brain growth and biochemistry
Day-old mallard (Anas platyryhnchos) ducklings received either a clean sediment (24%) supplemented control diet, Coeur d'Alene River Basin, Idaho (CDARB) sediment (3449 ug/g lead) supplemented diets at 12% or 24%, or a positive control diet (24% clean sediment with equivalent lead acetate to the 24% CDARB diet) for 6 weeks. The 12% CDARB diet resulted in a geometric mean concentration of...
Authors
E. Douglas-Stroebel, D. J. Hoffman, G. L. Brewer, L. Sileo
Tigers and their prey: Predicting carnivore densities from prey abundance Tigers and their prey: Predicting carnivore densities from prey abundance
The goal of ecology is to understand interactions that determine the distribution and abundance of organisms. In principle, ecologists should be able to identify a small number of limiting resources for a species of interest, estimate densities of these resources at different locations across the landscape, and then use these estimates to predict the density of the focal species at these...
Authors
K. U. Karanth, J.D. Nichols, S. Kumar, W.A. Link, J.E. Hines
Passive tick surveillance, dog seropositivity, and incidence of human Lyme disease Passive tick surveillance, dog seropositivity, and incidence of human Lyme disease
Data on nymphal Ixodes scapularis ticks submitted by the public to the University of Rhode Island Tick Research Laboratory for testing from 1991 to 2000 were compared with human case data from the Rhode Island Department of Health to determine the efficacy of passive tick surveillance at assessing human risk of Lyme disease. Numbers of ticks submitted were highly correlated with human...
Authors
Jaree L. Johnson, Howard S. Ginsberg, Elyes Zhioua, Ulysses G. Whitworth, Daniel Markowski, Kerwin E. Hyland, Renjie Hu