Publications
Explore WARC's science publications.
Filter Total Items: 3369
Estimating wintering Bald Eagle densities in the Mississippi Alluvial Valley
Surveys on the winter distribution of Bald Eagles have been concentrated in the northern USA (Hastings 1988, Mattson 1988), where Bald Eagles are most common. Few density estimates for wintering Bald Eagles exist. In the past, different survey techniques with little standardization have been used. Statistical analyses and error measurements of existing winter survey data usually are not possible.
Authors
Mike Brown, J.R. Nassar
Global climate change: USFWS coastal research
Scenarios of global climate change are still ambiguous; however, increasing sea level and atmospheric carbon dioxide (CO2) concentrations seem certain, although rates of change are still being debated. Predictions for other aspects of climate change, such as temperature, tropical storm frequency and intensity, and precipitation, are still in debate, and all predictions for local (e.g., watershed)
Authors
Janet R. Keough, Thomas W. Doyle, Robert E. Stewart
Effects of site, landscape features, and fire regime on vegetation patterns in presettlement southern Wisconsin
The presettlement tree cover (1831–33) of 3 townships in a southern Wisconsin landscape was analyzed using original survey records. Four forest types were identified: closed forest, open forest, savanna, and prairie. Comparisons of vegetation types and landscape pattern were made between the east and west sides of the Pecatonica River, which bisects the landscape and could have acted as a natural
Authors
Lawrence A. Leitner, Christopher P. Dunn, Glenn R. Guntenspergen, F. Stearns, David M. Sharpe
Incubation rhythm components for three Cinnamon Teal nesting in California
No abstract available.
Authors
William L. Hohman
Geographic and temporal variation in the diet of Yellow-headed Blackbirds
Yellow-headed Blackbirds (Xanthocephalus xanthocephalus) are presumed predators of sunflower (Helianthus annuus) in the northern Great Plains. Their esophageal contents varied temporally and among three provinces and three states in relation to regional agricultural bases but males contained more sunflower and small grains than females whereas females contained more weed seeds and insects than mal
Authors
Daniel J. Twedt, William J. Bleier, George M. Linz
The measurement of mangrove characteristics in southwest Florida using spot multispectral data
An intensive in situ sampling program near Marco Island, Florida during 19–23 October 1988 collected information on mangrove type, maximum canopy height, and percent canopy closure. These data were correlated with selected vegetation index information derived from analysis of SPOT multispectral (XS) data obtained on 21 October 1988. The Normalized Difference (ND) vegetation index information was t
Authors
John R. Jensen, Hongyue Lin, Xinghe Yang, Elijah Ramsey III, Bruce M. Davis, Chris W. Thoemke
The federal effort to evaluate coastal wetland mitigation: A report by the National Ocean Pollution Policy Board's Habitat Loss and Modification Working Group
No abstract available.
Authors
Sari J. Kiraly, Ford A. Cross, John D. Buffington
Additions to the ichthyofauna of the Bahama Islands, with comments on endemic species
Literature records or other documentation are given for 57 species of shorefishes added to the Bahaman ichthyofauna since publication of Fishes of the Bahamas; included are 32 new species described or discovered since 1967. Known distribution is specified for each species, including extralimital ranges of non-endemics. Fourteen species are listed as known only from the Bahamas although some likely
Authors
William F. Smith-Vaniz, Eugenia B. Bohlke
Role of river corridors as fish and wildlife habitat: Implications for management and restoration
No abstract available.
Authors
James A. Allen
Control of pest species: Tree shelters help protect seedlings from nutria
Various methods of nutria preventative techniques were tested in attempts to curb the loss of seedlings due to nutria capturing. The results of testing possibly indicate that tree shelters have real potential for use in forest restoration projects on sites with moderate nutria populations. Tree shelters may even prove effective on sites with high nutria populations, as long as alternative food sup
Authors
J. A. Allen, R. Boykin