Population dynamics of Microtus pennsylvanicus in corridor-linked patches
C.J. Coffman, J.D. Nichols, K. H. Pollock
2001, Oikos (93) 3-21
Corridors have become a key issue in the discussion of conservation planning: however, few empirical data exist on the use of corridors and their effects on population dynamics. The objective of this replicated, population level, capture-re-capture experiment on meadow voles was to estimate and compare population characteristics of voles...
Forest fragmentation and bird community dynamics: Inference at regional scales
T. Boulinier, J.D. Nichols, J.E. Hines, J.R. Sauer, C.H. Flather, K. H. Pollock
2001, Ecology (82) 1159-1169
With increasing fragmentation of natural areas and a dramatic reduction of forest cover in several parts of the world, quantifying the impact of such changes on species richness and community dynamics has been a subject of much concern. Here, we tested whether in more fragmented landscapes there was a lower...
Methods for Evaluating Wetland Condition #12: Using Amphibians in Bioassessments of Wetlands
D. W. Sparling, K.O. Richter, A. Calhoun, M. Micacchion
2001, Report, Methods for Evaluating Wetland Condition
Because amphibians have both aquatic and terrestrial life stages they can serve in a unique way among vertebrates as sources of information for bioassessments of both wetlands and surrounding habitats. Although there are many data gaps in our knowledge about the habitat requirements and ecology of many amphibian species,...
Development of a bird banding recapture database
J. Tautin, P.F. Doherty Jr., L. Metras
2001, Book chapter, Abstracts of papers presented at the 119th stated meeting of the American Ornithologists' Union in conjunction with the 20th annual meeting of the Society of Canadian Ornithologists Societe des Ornithologistes du Canada 16 - 18 August at the University of Washington, Seattle
Recaptures (and resightings) constitute the vast majority of post-release data from banded or otherwise marked nongame birds. A powerful suite of contemporary analytical models is available for using recapture data to estimate population size, survival rates and other parameters, and many banders collect recapture data for their project specific...
Access to bird population data
E. Martin, B.G. Peterjohn, M.D. Koneff
2001, Book chapter, Abstracts of papers presented at the 119th stated meeting of the American Ornithologists' Union in conjunction with the 20th annual meeting of the Society of Canadian Ornithologists Societe des Ornithologistes du Canada 16 - 18 August at the University of Washington, Seattle
Access to bird population data is critical for effective conservation planning and implementation. Although a tremendous volume of baseline data exists, it is often diffusely distributed and inaccessible to the resource manager and decision maker. A mechanism that facilitates assembly, documentation and delivery of avian data in a...
The robust design for capture-recapture studies: analysis using program MARK
W. L. Kendall
Rebecca Field, Robert J. Warren, Henryk Okarma, Paul R. Sievert, editor(s)
2001, Book chapter, Wildlife, Land and People: Priorities for the 21st Century
Collecting capture-recapture data under Pollock?s robust design provides an additional source of information on capture probability that can be used to provide less biased and more efficient estimates of population dynamics parameters. In addition, it can be used to estimate the probability of being available for capture, which in...
Methods for estimating dispersal probabilities and related parameters using marked animals
R.E. Bennetts, J.D. Nichols, R. Pradel, J.D. Lebreton, W.M. Kitchens
Jean Clobert, Etienne Danchin, Andre A. Dhondt, James D. Nichols, editor(s)
2001, Book chapter, Dispersal
Deriving valid inferences about the causes and consequences of dispersal from empirical studies depends largely on our ability reliably to estimate parameters associated with dispersal. Here, we present a review of the methods available for estimating dispersal and related parameters using marked individuals. We emphasize methods that place...
Regional patterns in proportion of bird species detected in the North American Breeding Bird Survey
J.R. Sauer, J.D. Nichols, J.E. Hines, T. Boulinier, C.H. Flather, W. L. Kendall
Rebecca Field, Robert J. Warren, Henryk Okarma, Paul R. Sievert, editor(s)
2001, Book chapter, Wildlife, Land, and People: Priorities for the 21st Century
Counts from the North American Breeding Bird Survey (BBS) underestimate species richness. We use capture-recapture methods to estimate species richness from BBS count data collected in 1996 and show that detection probabilities demonstrate clear regional patterns. Capture-recapture methods should be used to estimate species richness from count data,...
Estimation of species richness and parameters reflecting community dynamics using data from ecological monitoring programs
J.D. Nichols, J.R. Sauer, J.E. Hines, T. Boulinier, K. H. Pollock
Glenn D. Therres, editor(s)
2001, Book chapter, Conservation of Biological Diversity: A Key to the Restoration of the Chesapeake Bay Ecosystem and Beyond. Proceedings of a conference held May 10-13, 1998 in Annapolis.
Although many ecological monitoring programs are now in place, the use of resulting data to draw inferences about changes in biodiversity is problematic. The difficulty arises because of the inability to count all animals present in any sampled area. This inability results not only in underestimation of species richness...
Modeling avian detection probabilities as a function of habitat using double-observer point count data
P.J. Heglund, J.D. Nichols, J.E. Hines, J. Sauer, J. Fallon, F. Fallon
Rebecca Field, Robert J. Warren, Henryk Okarma, Paul R. Sievert, editor(s)
2001, Book chapter, Wildlife, Land, and People: Priorities for the 21st Century
Point counts are a controversial sampling method for bird populations because the counts are not censuses, and the proportion of birds missed during counting generally is not estimated. We applied a double-observer approach to estimate detection rates of birds from point counts in Maryland, USA, and test whether detection...
Effects of urbanization on the distribution of area-sensitive forest birds in Prince George's County, Maryland
D.K. Dawson, C.S. Robbins, L.J. Darr
Glenn D. Therres, editor(s)
2001, Book chapter, Conservation of Biological Diversity: A Key to the Restoration of the Chesapeake Bay Ecosystem and Beyond. Proceedings of a conference held May 10-13, 1998 in Annapolis.
Bird survey data from Prince George's County, Maryland, were used to evaluate the effects of urbanization on the distribution of forest bird species that are area sensitive. We developed models that predict the probability of occurrence for species during the nesting season as a function of forest area and...
Yukon River King Salmon - Ichthyophonus Pilot Study
R. M. Kocan, P.K. Hershberger
2001, Report
When king salmon enter the Yukon River on their spawning migration in mid June, over 25% of the population are infected with Ichthyophonus. The percent of infected fish remains relatively constant until the fish pass river mile 1,319 at Dawson, Y.T., then it drops to 13% when they reach river...
Data Model and Relational Database Design for Highway Runoff Water-Quality Metadata
Gregory E. Granato, Steven Tessler
2001, Open-File Report 2000-480
A National highway and urban runoff waterquality metadatabase was developed by the U.S. Geological Survey in cooperation with the Federal Highway Administration as part of the National Highway Runoff Water-Quality Data and Methodology Synthesis (NDAMS). The database was designed to catalog available literature and to document results of the synthesis...
Water resources data, Idaho, Water Year 2001. Volume 1
Water Resources Division, U.S. Geological Survey
2001, Water Data Report ID-01-1
No abstract available. ...
Real-time ground-water data for the nation
William L. Cunningham
2001, Fact Sheet 090-01
South Florida Everglades: satellite image map
John W. Jones, Jean-Claude Thomas, G.B. Desmond
2001, IMAP 2742
These satellite image maps are one product of the USGS Land Characteristics from Remote Sensing project, funded through the USGS Place-Based Studies Program (http://access.usgs.gov/) with support from the Everglades National Park (http://www.nps.gov/ever/). The objective of this project is to develop and apply innovative remote sensing and geographic information system techniques...
A comparison of load estimates using total suspended solids and suspended-sediment concentration data
G.D. Glysson, J. R. Gray, G. E. Schwarz
2001, Conference Paper, Bridging the Gap: Meeting the World's Water and Environmental Resources Challenges - Proceedings of the World Water and Environmental Resources Congress 2001
This paper presents the results to-date from a continuing investigation into the differences between total suspended solids (TSS) and suspended-sediment concentration (SSC) data and the ramifications of using each type of data to estimate sediment loads. It compares estimates of annual suspended-sediment loads that were made using regression equations developed...
Archive of the sidescan-sonar data and DGPS navigation data collected during USGS cruise 98008; Washington shelf, 24 June-5 July, 1998
Patricia M. McCrory, W. W. Danforth, T.F. O’Brien, D.S. Foster
2001, Open-File Report 2001-507
The STRATAFORM Project: U.S. Geological Survey geotechnical studies
Diane L. Minasian, Homa J. Lee, Jaques Locat, Kevin M. Orzech, Gregory R. Martz, Kenneth Israel
2001, Open-File Report 2001-190
This report presents physical property logs of core samples from an offshore area near Eureka, CA. The cores were obtained as part of the STRATAFORM Program (Nittrouer and Kravitz, 1995, 1996), a study investigating how present sedimentation and sediment transport processes influence long-term stratigraphic sequences preserved in the geologic record....
Relationship of faults in basin sediments to the gravity and magnetic expression of their underlying fault systems
Christopher A. Baldyga
2001, Open-File Report 2001-502
Gravity and magnetic surveys were performed along the western flanks of the Santa Rita Mountain range located in southeastern Arizona to develop an understanding of the relationship between surface fault scarps within the basin fill sediments and theirgeophysical response of the faults at depth within the bedrock. Data were acquired...
Geologic map of the Tucson and Nogales quadrangles (Arizona, scale 1:250,000): A digital database
J.A. Peterson, J. R. Berquist, S. J. Reynolds, S. S. Page-Nedell, Gustav P. Oland, Douglas M. Hirschberg
2001, Open-File Report 2001-275
The geologic map of the Tucson-Nogales 1:250,000 scale quadrangle (Peterson and others, 1990) was digitized by U.S. Geological Survey staff and University of Arizona contractors at the Southwest Field Office, Tucson, Arizona, in 2000 for input into a geographic information system (GIS). The database was created for use as a...
Remote rainfall sensing for landslide hazard analysis
Gerald F. Wieczorek, Harry McWreath, Clay Davenport
2001, Open-File Report 2001-339
Methods of assessing landslide hazards and providing warnings are becoming more advanced as remote sensing of rainfall provides more detailed temporal and spatial data on rainfall distribution. Two recent landslide disasters are examined noting the potential for using remotely sensed rainfall data for landslide hazard analysis. For the June 27,...
U.S. Geological Survey Ground-Water Resources Program, 2001
Norman G. Grannemann
2001, Fact Sheet 056-01
Ground water is among the Nation's most important natural resources. It provides drinking water to urban and rural communities, supports irrigation and industry, sustains the flow of streams and rivers, and maintains riparian and wetland ecosystems. In many areas of the Nation, the future sustainability of ground-water resources is at...
40Ar/39Ar age-spectrum and laser fusion data for volcanic rocks in west central Colorado
Michael J. Kunk, Jeffrey A. Winick, Josette O. Stanley
2001, Open-File Report 2001-472
Habitat, biota, and sediment characteristics at selected stations in the lower Illinois River Basin, Illinois, 1996-98
Debbie L. Adolphson, David J. Fazio, Mitchell A. Harris
2001, Water-Resources Investigations Report 2001-4068
Data collection for the lower Illinois River Basin (LIRB) National Water-Quality Assessment (NAWQA) program began in 1996. Data on habitat, fish, benthic macroinvertebrates, and sediment were collected at eight stations on six streams in the basin--Illinois River, Panther Creek, Mackinaw River, Indian Creek, Sangamon River, and La Moine River. These...
