Skip to main content
U.S. flag

An official website of the United States government

Publications

Explore WARC's science publications.

Filter Total Items: 3349

Fire management in fens and wet grasslands grazed by cattle

Managers grapple with the problem of shrub invasion in fens and wet grasslands, and the invasion of shrubs is a particular problem in newly acquired natural areas that were once grazed by cattle. The specific management for any particular fen or wet grassland depends greatly on its previous land-use history. Managers should have a clear understanding of the grazing and drainage history of newly ac
Authors
Beth A. Middleton

Water resources data, Florida, water year 2005. Volume 2A: south Florida surface water

Water resources data for 2005 water year in Florida consists of continuous or daily discharge for 429 streams, periodic discharge for 9 streams, continuous or daily stage for 218 streams, periodic stage for 5 stream, peak discharge for 28 streams, and peak stage for 28 streams, continuous or daily elevations for 15 lakes, periodic elevations for 23 lakes, continuous ground-water levels for 401 wel
Authors
C. Price, K. Overton

Ecological consequences of changing hydrological conditions in wetland forests of coastal Louisiana

Large-scale and localized alterations of processes affecting deltaic coastal wetlands have caused the complete loss of some coastal wetland forests and reduced the productivity and vigor of many areas in coastal Louisiana. This loss and degradation threatens ecosystem functions and the services they provide. This paper summarizes ecological relationships controlled by hydrological processes in coa
Authors
Richard F. Keim, J. L. Chambers, M.S. Hughes, J. Andrew Nyman, Craig A. Miller, Blake J. Amos, W.H. Conner, Jon Day, Stephen Faulkner, Emile S. Gardiner, Sammy L. King, K.W. McLeod, Gary P. Shaffer

Water resources data, Florida, water year 2005Volume 2B: South Florida ground water

Water resources data for 2005 water year in Florida consists of continuous or daily discharge for 429 streams, periodic discharge for 9 streams, continuous or daily stage for 218 streams, periodic stage for 5 stream, peak discharge for 28 streams, and peak stage for 28 streams, continuous or daily elevations for 15 lakes, periodic elevations for 23 lakes, continuous ground-water levels for 401 wel
Authors
S. Prinos, R. Irvin, M. Byrne

Invasive species and climate change

Invasive species challenge managers in their work of conserving and managing natural areas and are one of the most serious problems these managers face. Because invasive species are likely to spread in response to changes in climate, managers may need to change their approaches to invasive species management accordingly.
Authors
Beth A. Middleton

A comparison of biofouling communities associated with free-ranging and captive Florida manatees (Trichechus manatus manatus)

No abstract available.
Authors
Erin L. Bledsoe, Kendal E. Harr, Mary F. Cichra, Edward J. Philips, Robert K. Bonde, Mark Lowe

Salt marsh dieback in coastal Louisiana: Survey of plant and soil conditions in Barataria and Terrebonne basins, June 2000-September 2001

Sudden and extensive dieback of the perennial marsh grass, Spartina alterniflora Loisel (smooth cordgrass), which dominates regularly flooded salt marshes along the Gulf of Mexico and Atlantic coastlines, occurred in the coastal zone of Louisiana. The objectives of this study were to assess soil and plant conditions in dieback areas of the Barataria-Terrebonne estuarine system as well as vegetativ
Authors
Karen L. McKee, Irving A. Mendelssohn, Michael D. Materne

Potentiometric surface of the Upper Floridan aquifer in the St. Johns River water management district and vicinity, Florida, September 2005

This map depicts the potentiometric surface of the Upper Floridan aquifer in the St. Johns River Water Management District and vicinity for September 2005. Potentiometric contours are based on water-level measurements collected at 643 wells during the period September 12-28, near the end of the wet season. Some contours are inferred from previous potentiometric-surface maps with larger well networ
Authors
Sandra L. Kinnaman

Salinity tolerance of goldfish, Carassius auratus, a non-native fish in the United States

No abstract available.
Authors
Pamela J. Schofield, Mary E. Brown, Pamela L. Fuller

Comment on "Asymmetric coevolutionary networks facilitate biodiversity maintenance"

Bascompte et al. (Reports, 21 April 2006, p. 431) used network asymmetries to explain mathematical conditions necessary for stability in historic models of mutualism. The Lotka-Volterra equations they used artificially created conditions in which some factor, such as asymmetric interaction strengths, is necessary for community coexistence. We show that a more realistic model incorporating nonlinea
Authors
J. Nathaniel Holland, Toshinori Okuyama, Donald L. DeAngelis

A standard protocol for describing individual-based and agent-based models

Simulation models that describe autonomous individual organisms (individual based models, IBM) or agents (agent-based models, ABM) have become a widely used tool, not only in ecology, but also in many other disciplines dealing with complex systems made up of autonomous entities. However, there is no standard protocol for describing such simulation models, which can make them difficult to understan
Authors
Volker Grimm, Uta Berger, Finn Bastiansen, Sigrunn Eliassen, Vincent Ginot, Jarl Giske, John Goss-Custard, Tamara Grand, Simone K. Heinz, Geir Huse, Andreas Huth, Jane U. Jepsen, Christian Jorgensen, Wolf M. Mooij, Birgit Muller, Guy Pe'er, Cyril Piou, Steven F. Railsback, Andrew M. Robbins, Martha M. Robbins, Eva Rossmanith, Nadja Ruger, Espen Strand, Sami Souissi, Richard A. Stillman, Rune Vabo, Ute Visser, Donald L. DeAngelis

Water-level decline in the Apalachicola River, Florida, from 1954 to 2004, and effects on floodplain habitats

From 1954 to 2004, water levels declined in the nontidal reach of the Apalachicola River, Florida, as a result of long-term changes in stage-discharge relations. Channel widening and deepening, which occurred throughout much of the river, apparently caused the declines. The period of most rapid channel enlargement began in 1954 and occurred primarily as a gradual erosional process over two to thre
Authors
Helen M. Light, Kirk R. Vincent, Melanie R. Darst, Franklin D. Price