Show simple item record Thompson, Sally E. Daniels, Karen 2012-03-12T13:10:13Z 2012-03-12T13:10:13Z 2010-01
dc.description.abstract Spatial ecological patterns are usually ascribed to Turingtype reaction-diffusion or scale-dependent feedback processes, but morphologically indistinguishable patterns can be produced by instabilities in fluid flow. We present a new hypothesis that suggests that fluid convection and chill damage to plants could form vegetation patterns with wavelengths ≈1–2 times the plant height. Previous hypotheses for small-scale vegetation pattern formation relied on a Turing process driven by competition for water, which is thought to occur in large vegetation patterns. Predictions of the new hypothesis were consistent with properties of natural grass patterns in North Carolina, contradicting the Turing hypothesis. These results indicate that similarities in pattern morphology should not be interpreted as implying similarities in the pattern-forming processes, that small-wavelength vegetation patterns may arise from mechanisms that are distinct from those generating long-wavelength vegetation patterns, and that fluid instabilities should be recognized as a cause of ecological patterns. en_US
dc.language.iso en_US en_US
dc.publisher The American Naturalist en_US
dc.relation.isversionof DOI: 10.1086/648603 en_US
dc.subject ecological patterns en_US
dc.subject thermal convection en_US
dc.subject soil moisture en_US
dc.subject chill damage en_US
dc.title A Porous Convection Model for Grass Patterns en_US
dc.type Article en_US
duke.description.endpage E15 en_US
duke.description.issue 1 en_US
duke.description.startpage E10 en_US
duke.description.volume 175 en_US

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