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Mathematical Biosciences and Engineering

2008, Volume 5, Issue 4: 877-887. doi: 10.3934/mbe.2008.5.877
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Food web dynamics in a seasonally varying wetland

  • 1.
    U.S. Geological Survey and Department of Biology, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33143
  • 2.
    Florida International University, Miami, Florida 33133
  • 3.
    Everglades National Park, National Park Service, Homestead, Florida 33199
  • Received: 01 December 2007 Accepted: 29 June 2018 Published: 01 October 2008

  • MSC : Primary: 92D40

  • A spatially explicit model is developed to simulate the small fish community and its underlying food web, in the freshwater marshes of the Everglades. The community is simplified to a few small fish species feeding on periphyton and invertebrates. Other compartments are detritus, crayfish, and a piscivorous fish species. This unit food web model is applied to each of the 10,000 spatial cells on a 100 x 100 pixel landscape. Seasonal variation in water level is assumed and rules are assigned for fish movement in response to rising and falling water levels, which can cause many spatial cells to alternate between flooded and dry conditions. It is shown that temporal variations of water level on a spatially heterogeneous landscape can maintain at least three competing fish species. In addition, these environmental factors can strongly affect the temporal variation of the food web caused by top-down control from the piscivorous fish.

    Citation: Donald L. DeAngelis, Joel C. Trexler, Douglas D. Donalson. Food web dynamics in a seasonally varying wetland[J]. Mathematical Biosciences and Engineering, 2008, 5(4): 877-887. doi: 10.3934/mbe.2008.5.877

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  • A spatially explicit model is developed to simulate the small fish community and its underlying food web, in the freshwater marshes of the Everglades. The community is simplified to a few small fish species feeding on periphyton and invertebrates. Other compartments are detritus, crayfish, and a piscivorous fish species. This unit food web model is applied to each of the 10,000 spatial cells on a 100 x 100 pixel landscape. Seasonal variation in water level is assumed and rules are assigned for fish movement in response to rising and falling water levels, which can cause many spatial cells to alternate between flooded and dry conditions. It is shown that temporal variations of water level on a spatially heterogeneous landscape can maintain at least three competing fish species. In addition, these environmental factors can strongly affect the temporal variation of the food web caused by top-down control from the piscivorous fish.


  • This article has been cited by:

    1. A. Obaza, D. L. DeAngelis, J. C. Trexler, Using data from an encounter sampler to model fish dispersal, 2011, 78, 00221112, 495, 10.1111/j.1095-8649.2010.02867.x
    2. Maria C. Loinaz, Dayna Gross, Robert Unnasch, Michael Butts, Peter Bauer-Gottwein, Modeling ecohydrological impacts of land management and water use in the Silver Creek basin, Idaho, 2014, 119, 21698953, 487, 10.1002/2012JG002133
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  • © 2008 the Author(s), licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0)
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