Life history trade-offs and community dynamics of small fishes in a seasonally pulsed wetland

Donald L. DeAngelis, Joel C. Trexler, William F. Loftus

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

We used a one-dimensional, spatially explicit model to simulate the community of small fishes in the freshwater wetlands of southern Florida, USA. The seasonality of rainfall in these wetlands causes annual fluctuations in the amount of flooded area. We modeled fish populations that differed from each other only in efficiency of resource utilization and dispersal ability. The simulations showed that these trade-offs, along with the spatial and temporal variability of the environment, allow coexistence of several species competing exploitatively for a common resource type. This mechanism, while sharing some characteristics with other mechanisms proposed for coexistence of competing species, is novel in detail. Simulated fish densities resembled patterns observed in Everglades empirical data. Cells with hydroperiods less than 6 months accumulated negligible fish biomass. One unique model result was that, when multiple species coexisted, it was possible for one of the coexisting species to have both lower local resource utilization efficiency and lower dispersal ability than one of the other species. This counterintuitive result is a consequence of stronger effects of other competitors on the superior species.

Original languageEnglish
Pages (from-to)781-790
Number of pages10
JournalCanadian Journal of Fisheries and Aquatic Sciences
Volume62
Issue number4
DOIs
StatePublished - Apr 1 2005

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community dynamics
wetlands
life history
wetland
fish
freshwater fish
coexistence
rain
hydroperiod
biomass
seasonality
cells
rainfall
resource
simulation

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Life history trade-offs and community dynamics of small fishes in a seasonally pulsed wetland. / DeAngelis, Donald L.; Trexler, Joel C.; Loftus, William F.

In: Canadian Journal of Fisheries and Aquatic Sciences, Vol. 62, No. 4, 01.04.2005, p. 781-790.

Research output: Contribution to journalArticle

DeAngelis, Donald L. ; Trexler, Joel C. ; Loftus, William F. / Life history trade-offs and community dynamics of small fishes in a seasonally pulsed wetland. In: Canadian Journal of Fisheries and Aquatic Sciences. 2005 ; Vol. 62, No. 4. pp. 781-790.
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