Wetland and Aquatic Research Center

Publications

Explore WARC's science publications.

Filter Total Items: 2,489
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Year Published: 1995

Coastal ecosystem decision‐support GIS: Functions and methodology

To solve coastal resource and environmental issues and handle complex spatial data and information effectively and efficiently, a coastal ecosystem decision‐support geographic information system (GIS) is being developed at the Southern Science Center of the U.S. National Biological Service. With three subsystems, natural resource management,...

Ji, Wei; Johnson, James B.

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Year Published: 1995

Monitoring flooding in coastal wetlands by using radar imagery and ground-based measurements

Satellite radar was used in a Florida Juncus roemerianus marsh to map tidal flooding, a critical control of coastal vegetation distribution. Radar images taken during a time of near-continuous recordings of ground-based hydrology measurements directly linked marsh flooding to lowered radar returns and indicated a negative covariation...

Ramsey, Elijah

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Year Published: 1995

Offspring growth in the California gull: Reproductive effort and parental experience hypotheses

Measures of adult feeding and foraging behaviour in the California gull, Larus californicus, were related to the growth of their offspring. Offspring showed significantly higher growth when average feeding interval, a measure of the time interval between feedings, and feeding latency following foraging decreased. The amount of time parents...

Pugesek, Bruce H.

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Year Published: 1995

Direct denitrification in mangrove sediments in Terminos Lagoon, Mexico

Rates of direct denitrification were measured using 15N isotope tchniques in intact sediment cores from fringe and basin mangroves in Terminos Lagoon, Mexico. Sediments were injected with 15NO3- and the distribution of 15N was measured over time in the head space, overlying water, and sediments. Experiments included an...

Rivera-Monroy, V. H.; Twilley, Robert; Boustany, Ronald G.; Day, John W.; Vera-Herrera, F.; del Carmen-Ramirez, Maria

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Year Published: 1995

The influence of Hurricane Andrew on sediment distribution in Louisiana coastal marshes

The areal extent and temporal patterns of sediment deposition in delta marshes and shallow water bodies of Louisiana associated with the passage of Hurricane Andrew were determined from sediment traps, marker horizons, and benchmarks deployed for other studies. Data were collected over different time scales from 11 sites representing salt,...

Cahoon, Donald R.; Reed, Denise J.; Day, J.W.; Steyer, Gregory; Boumans, R.M.; James C. Lynch; McNally, David; Latif, Numair

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Year Published: 1995

Modeling mangrove canopy reflectance using a light interaction model and an optimization technique

At 20 sites, incorporating mixtures of black, red, and white mangroves, canopy reflectance spectra were derived from high resolution spectral data taken from a helicopter platform. Canopy characteristics were predicted from the canopy reflectance spectra by using measured and estimated data as inputs into a light-canopy interaction model within a...

Ramsey III, Elijah; Jensen, John R.

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Year Published: 1995

Disturbance and recovery of the Louisiana coastal marsh landscape from the impacts of Hurricane Andrew

The impact of Hurricane Andrew on the Louisiana coastal landscape and the initial recovery of wetland plant communities was determined from extensive surveys of a large geographic region of coastal marsh near Atchafalaya Bay and intensive studies of an oligohaline marsh on Otter Bayou. Wind and water movements associated with the hurricane...

Guntenspergen, Glenn R.; Cahoon, Donald R.; Grace, James B.; Steyer, Gregory D.; Fournet, Stephen; Townson, M. A.; Foote, A. Lee

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Year Published: 1995

Microwave radiometers and their application in field and aircraft campaigns for remote sensing of land and water surfaces

The paper presents an overview of the scientific investigations and practical applications of a group of specialists working in the Institute of Radioengineering and Electronics of the Russian Academy of Sciences (IRE RAS) with their partners in Russia and the USA in the area of passive microwave remote sensing as applied to the study of soil,...

Shutko, A.M.; Haldin, A.A.; Novichikhin, E.P.; Mil'shin, A.A.; Golovachev, S.P.; Grankov, A.G.; Mishanin, V.G.; Jackson, T.J.; Logan, B.J.; Tilley, G.B.; Ramsey, E.W.; Pirchner, H.

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Year Published: 1995

Wind shear stress measurements in a coastal marsh during Hurricane Andrew

Hurricane Andrew produced changes to the Louisiana wetlands not normally observed after lesser, more common storms. For example, the <25 m/s wind speeds generated by cold fronts and winter storms, and any accompanying storm surge, do not cause substantial, wide-spread alteration of marsh vegetation. During Hurricane Andrew, however, the wind,...

Dingler, J. R.; Hsu, S.A.; Foote, A. Lee

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Year Published: 1995

Structural impact of hurricane Andrew on the forested wetlands of the Atchaflaya Basin in South Louisiana

On August 26, 1992, Hurricane Andrew hit the Louisiana coast and traversed a large portion of the lower Atchafalaya Basin, bounding the largest remaining tract of cypress-tupelo and bottomland hardwood swamp in the United States. Permanent field sites were established following the hurricane to assess the extent of forest damage and to monitor the...

Doyle, Thomas W.; Keeland, Bobby D.; Gorham, Lance E.; Johnson, Darrin J.

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Year Published: 1995

Comparison of condition indices in migratory passerines at a stopover site in coastal Louisiana

We evaluated the utility of four nondestructive condition indices—body mass, body mass scaled by wing chord length, fat scoring, and total body electrical conductivity method (TOBEC)—as predictors of lipid levels in migrating Wood Thrushes (Hylocichla mustelina), Swainson's Thrushes (Catharus ustulatus), and Summer Tanagers (Piranga rubra). The...

Spengler, Terry J.; Leberg, P.L.; Barrow, Wylie C.