A dynamic landscape model for fish in the everglades and its application to restoration

Holly Gaff, Donald L. Deangelis, Louis J. Gross, Rene Salinas, Moris Shorrosh

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

A model (ALFISH) for fish functional groups in freshwater marshes of the greater Everglades area of southern Florida has been developed. Its main objective is to assess the spatial pattern of fish densities through time across freshwater marshes. This model has the capability of providing a dynamic measure of the spatially-explicit food resources available to wading birds. ALFISH simulates two functional groups, large and small fish, where the larger ones can prey on the small fish type. Both functional groups are size-structured. The marsh landscape is modeled as 500 x 500 m spatial cells on a grid across southern Florida. A hydrology model predicts water levels in the spatial cells on 5-day time steps. Fish populations spread across the marsh during flooded conditions and either retreat into refugia (alligator ponds), move to other spatial cells, or die if their cell dries out. ALFISH has been applied to the evaluation of alternative water regulation scenarios under the Central and South Florida Comprehensive Project Review Study. The objective of this Review Study is to compare alternative methods for restoring historical ecological conditions in southern Florida. ALFISH has provided information on which plans are most are likely to increase fish biomass and its availability to wading bird populations. (C) 2000 Elsevier Science B.V.

Original languageEnglish (US)
Pages (from-to)33-52
Number of pages20
JournalEcological Modelling
Volume127
Issue number1
DOIs
StatePublished - Mar 1 2000

Keywords

  • Everglades
  • Fish
  • Freshwater marshes
  • Scenario evaluation
  • Spatially explicit model

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecological Modeling
  • Ecology

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