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An analysis of water level dynamics in Esteros del Ibera wetland
Institution:1. Graduate Student, Graduate School for International Development and Cooperation, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8529, Japan.;2. Researcher, National Agriculture and Food Research Organization, Hokkaido Agricultural Research Center, Sapporo, Hokkaido 062-8555, Japan.;3. Associate Professor, Graduate School for International Development and Cooperation, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8529, Japan.;4. Undergraduate Student, Graduate School for International Development and Cooperation, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8529, Japan.;5. Assistant Professor, Graduate School for International Development and Cooperation, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8529, Japan.;6. Associate Professor, Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8529, Japan.
Abstract:In an apparent violation of Gause’s principle of competitive exclusion, many metapopulation models of interspecific competition make the claim that identical species can coexist in spatially structured habitats. In these models, it is assumed that extinction and colonization parameters are always the same for both species, independent of the relative abundance of the two species in doubly occupied patches. We show that it is this simplifying assumption that gives an unfair advantage to the regionally rarer species. More realistic assumptions in these models would lead to different conclusions, which indicate that two identical species cannot coexist regionally in a network of many habitat patches.
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