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Filter Total Items: 3350

The use of resighting data to estimate the rate of population growth of the snail kite in Florida

The rate of population growth (lambda) is an important demographic parameter used to assess the viability of a population and to develop management and conservation agendas. We examined the use of resighting data to estimate lambda for the snail kite population in Florida from 1997-2000. The analyses consisted of (1) a robust design approach that derives an estimate of lambda from estimates of pop
Authors
V.J. Dreitz, J. D. Nichols, J. E. Hines, R.E. Bennetts, W.M. Kitchens, D.L. DeAngelis

Effects of disturbance on germination and seedling establishment in a coastal prairie grassland: A test of the competitive release hypothesis

1. We evaluated the responses of native grassland sods to a variety of types of disturbance in order to assess hypotheses about the competitive effects of established vegetation on seed germination and seedling establishment. In particular, we consider whether germination is more responsive to the magnitude and duration of vegetation removal (competitive release) or to individual disturbance types
Authors
H.M. Jutila, J.B. Grace

Interspecific differences in susceptibility to competition and predation in a species-pair of larval amphibians

Fundamental issues in the study of predator-prey interactions include addressing how prey coexist with their predators and, moreover, whether predators promote coexistence among competing prey. We conducted a series of laboratory experiments with a freshwater assemblage consisting of two predators that differed in their foraging modes (a crayfish, Procambarus sp., and the western mosquitofish, Gam
Authors
Susan C. Walls, David G. Taylor, Charlena M. Wilson

Patterns and processes of wetland loss in coastal Louisiana are complex: A reply to Turner 2001. Estimating the indirect effects of hydrologic change on wetland loss: If the Earth is curved, then how would we know it?

The coastal wetlands of Louisiana comprise a vast expanse of marine to freshwater wetland plant communities interspersed w-ith shallow bays and bayous. These wetlands were built by processes associated with the present-day Mississippi and Atchatfalaya River deltas and older distributaries occupied by the river over the past 7,000 }rears. The high rates of wetland loss identified in this system dur
Authors
John W. Day, Gary P. Shaffer, Denise J. Reed, Donald R. Cahoon, Louis D. Britsch, Suzanne Hawes

Canopy disturbance patterns in a bottomland hardwood forest in northeast Arkansas, USA

We characterized canopy disturbance patterns in a bottomland hardwood forest and identified linkages to tree species characteristics and interannual flooding patterns. We located 116 newly formed canopy gaps created by 136 gapmakers of 13 species. Over 83% of the gapmakers were snapped or uprooted (i.e., windthrow). The probability of any given gapmaker snapping or uprooting differed among years,
Authors
Sammy L. King, T. J. Antrobus

Prairie Cajuns and the Cajun Prairie: A history

No abstract available.
Authors
Malcolm Vidrine, William R. Pontenot, Charles Allen, Bruno Borsari, Larry K. Allain

Potential consequences of climate variability and change on coastal areas and marine resources

No abstract available.
Authors
John C. Field, Donald F. Boesch, Donald Scavia, Robert Buddemeier, Virginia Burkett, Daniel Cayan, Michael Fogarty, Mark Harwell, Robert Howarth, Curt Mason, L.J. Pietrafesa, Denise Reed, Thomas Royer, Asbury Sallenger, Michael Spranger, James G. Titus

Lepidopteran and odonate communities in the Cajun Prairie ecosystem in southwestern Louisiana

No abstract available.
Authors
Malcolm Vidrine, Charles Allen, Bruno Borsari, Larry K. Allain

Potential consequences of climate variability and change for the Southeastern United States

No abstract available.
Authors
Virginia Burkett, Ronald Ritschard, Steven McNulty, J. J. O'Brien, Robert C. Abt, James Jones, Upton Hatch, Brian Murray, Shrikant Jagtap, Jim Cruise

Recent colonization of mangroves and nesting frigatebirds at Dry Tortugas

No abstract available.
Authors
Thomas Doyle, Thomas C. Michot, Richard H. Day, Christopher J. Wells