Current Search: P. Brian Garrett (x)
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Title
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Factors Affecting Wading Bird Prey Concentrations in the Everglades During the Dry Season.
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Creator
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P. Brian Garrett, Gawlik, Dale E., Florida Atlantic University
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Abstract/Description
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One factor that potentially controls the distribution and density of wading bird prey within open-water marsh habitats during seasonal drying events is the amount of available aquatic habitat, which is partly a function of the amount of microtopographic relief at a given location. To determine how microtopographic relief affects prey concentrations during dry-downs a simulation model was developed and run using empirical microtopographic data collected from the Everglades. The simulation...
Show moreOne factor that potentially controls the distribution and density of wading bird prey within open-water marsh habitats during seasonal drying events is the amount of available aquatic habitat, which is partly a function of the amount of microtopographic relief at a given location. To determine how microtopographic relief affects prey concentrations during dry-downs a simulation model was developed and run using empirical microtopographic data collected from the Everglades. The simulation suggests that those locations within the marsh with higher levels of microtopographic relief concentrate prey earlier during the dry-down period and potentially to greater densities overall. In addition, a model selection analysis was performed on field data to determine which set of factors displayed the greatest effects upon prey concentrations during drydown events. When examining the best selected a priori model it appears that the amount of available aquatic habitat, water depth, and macrophyte density have the strongest affects upon concentrations of prey during a seasonal drying event.
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Date Issued
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2007
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PURL
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http://purl.flvc.org/fau/fd/FA00000769
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Subject Headings
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Water birds--Florida--Everglades, Wetland ecology--Florida--Everglades, Bird populations--Climatic factors--Florida--Everglades
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Format
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Document (PDF)
