Biology 423 Winter 2013 Lecture 07

Hsu j oyadamari coexistence fallow elds are diverse

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Unformatted text preview: equirements. HSU J Oyadamari Coexistence • Fallow fields are diverse. • Why doesn’t competitive exclusion limit diversity? • H1: The heterogeneous distribution of resources in fallow fields promotes diversity. Rothamsted experiment, 1856 Coexistence Species richness • Eliminating spatial heterogeneity reduced biodiversity. Rothamsted experiment, 1856 Coexistence Proportional abundance Abundance rank • Heterogeneous resource distribution allows coexistence. Coexistence B Gustafson, 1/5/2010/UC Santa Barbara Coexistence Medium boulders Large boulders % of boulders % of boulders Small boulders # of species # of species # of species High Intermediate Low • Why do more species coexist on medium boulders? Sousa 1979a Coexistence • Small boulders are most vulnerable to wave disturbance. • Large boulders are rarely disturbed by waves. Coexistence Medium boulders Large boulders % of boulders % of boulders Small boulders # of species # of species # of species High Intermediate Low • Temporal heterogeneity promotes diversity by interrupting com...
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This note was uploaded on 02/26/2013 for the course BIOLOGY 356 taught by Professor Horwith during the Winter '13 term at University of Washington.

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