Publications
Explore WARC's science publications.
Filter Total Items: 3377
USGS reports latest land-water changes for southeastern Louisiana
The USGS National Wetlands Research Center is reporting that a total of 118 square miles of land has been transformed to new water areas in a 9,742 square mile area from the Chandeleur Islands to the Atchafalaya River. This area encompasses the basins of Breton Sound, Mississippi River, Pearl River, Pontchartrain, Barataria, Terrebonne and the western quarter of the Atchafalaya basin.
Authors
John A. Barras, James B. Johnston
Bioindicators from Mosquitofish (Gambusia affinis) Sampled from the Imperial Valley in Southern California
The Sonny Bono Salton Sea National Wildlife Refuge (SSNWR) is located 64 km north of the Mexican border at the southern end of the Salton Sea in California's Imperial Valley. Freshwater ponds and managed habitats at the SSNWR, Calipatria, Calif. are supplied with Colorado River water that carries compounds from upstream sources. Components include municipal and industrial discharges, agricultural
Authors
Jill A. Jenkins, Rassa O. Draugelis-Dale
The Interface Between Theory and Data in Structural Equation Models
Structural equation modeling (SEM) holds the promise of providing natural scientists the capacity to evaluate complex multivariate hypotheses about ecological systems. Building on its predecessors, path analysis and factor analysis, SEM allows for the incorporation of both observed and unobserved (latent) variables into theoretically based probabilistic models. In this paper we discuss the interfa
Authors
James B. Grace, Kenneth A. Bollen
Back to the basics: Lake Tahoe, California /Nevada: Geography and mathematics
Back to the Basics: Lake Tahoe, California/Nevada* continues the Wetland Education Through Maps and Aerial Photography (WETMAAP) Program of exercises on teaching foundational map reading and spatial differentiation skills. It is the third published exercise from the Back to the Basics series developed by the WETMAAP Program. The current exercise modified is from the Lake Tahoe Back to the Basics w
Authors
Lawrence R. Handley, Catherine M. Lockwood, Nathan Handley
Possible effects of the 2004 and 2005 hurricanes on manatee survival rates and movement
Abstract not supplied at this time
Authors
C.A. Langtimm, M. D. Krohn, J. P. Reid, B.M. Stith, C.A. Beck
Relative vulnerability of female turtles to road mortality
Abstract not supplied at this time
Authors
D.A. Steen, M. Aresco, S.G. Beilke, B. Compton, C. K. Dodd, H. Forrester, J.W. Gibbons, J. Greene-McLeod, G. Johnson, T. Langen, M.J. Oldham, D.N. Oxier, R. Sammure, F. Schueler, Jonathan Sleeman, L. L. Smith, J. Tucker, J.P. Gibbs
Possible effects of the 2004 and 2005 hurricanes on manatee survival rates and movement
Abstract not supplied at this time
Authors
C.A. Langtimm, M. D. Krohn, J. P. Reid, B.M. Stith, C.A. Beck
Vanishing before our eyes
No abstract available
Authors
Wylie C. Barrow, William R. Fontenot, Madeline H. Barrow, Richard A. DeMay, David Muth
Evaluation of eelgrass beds mapping using a high-resolution airborne multispectral scanner
Eelgrass (Zostera marina) can provide vital ecological functions in stabilizing sediments, influencing current dynamics, and contributing significant amounts of biomass to numerous food webs in coastal ecosystems. Mapping eelgrass beds is important for coastal water and nearshore estuarine monitoring, management, and planning. This study demonstrated the possible use of high spatial (approximately
Authors
H. Su, D. Karna, E. Fraim, M. Fitzgerald, J. S. Myers, R. Dominguez, B. Coffland, Lawrence R. Handley, T. Mace
A multivariate model of plant species richness in forested systems: Old-growth montane forests with a long history of fire
Recently, efforts to develop multivariate models of plant species richness have been extended to include systems where trees play important roles as overstory elements mediating the influences of environment and disturbance on understory richness. We used structural equation modeling to examine the relationship of understory vascular plant species richness to understory abundance, forest structure
Authors
D.C. Laughlin, J.B. Grace