Feedback Between Ecological Interaction and Spatial Pattern in a Transitional Michigan Forest

Show simple item record Allen, David Nicoletti en_US 2012-06-15T17:31:18Z NO_RESTRICTION en_US 2012-06-15T17:31:18Z 2012 en_US en_US
dc.description.abstract Ecology has traditionally thought of spatial patterns in one of two ways: (1) as a consequence of some underlying environmental heterogeneity and (2) as something to ignore in models to make them more tractable. But both of these views have changed, and in the last 20 years ecologists have increasingly considered the joint feedback that spatial pattern and ecological interactions can have on each other. Going in one direction the spatial pattern of organisms can greatly affect how their ecological interactions play out, and in the other direction local-scale ecological interactions can give rise to emergent, self-organized spatial patterns of organisms. This dissertation examines both directions of this feedback in the context of a mid-successional Michigan forest. The three dominant species in the understory of the forest exhibit strong nonrandom spatial patterning. Here we suggest that this spatial pattern emerges from biotic interactions -- the combined effect of local dispersal and Janzen-Connell, density-dependent seed and seedling mortality of two of these three species -- acting on an initial distribution of trees determined by the fire history of the area. That is ecological interactions give rise to spatial pattern, but this can only be understood in light of the history of the forest. We also suggest that this spatial pattern will affect how the succession of the forest; if the species were completely well-mixed the succession of the forest would take place differently. So we show that the spatial arrangement of organisms affects ecological processes. en_US
dc.language.iso en_US en_US
dc.subject Self-organized Pattern Formation en_US
dc.subject Janzen-Connell Effect en_US
dc.subject Forest Ecology en_US
dc.subject Dispersal Limitation en_US
dc.title Feedback Between Ecological Interaction and Spatial Pattern in a Transitional Michigan Forest en_US
dc.type Thesis en_US
dc.description.thesisdegreename Ph.D. en_US
dc.description.thesisdegreediscipline Ecology and Evolutionary Biology en_US
dc.description.thesisdegreegrantor University of Michigan, Horace H. Rackham School of Graduate Studies en_US
dc.contributor.committeemember Vandermeer, John H. en_US
dc.contributor.committeemember Dick, Christopher William en_US
dc.contributor.committeemember Ibanez, Ines en_US
dc.contributor.committeemember King, Aaron Alan en_US
dc.subject.hlbsecondlevel Ecology and Evolutionary Biology en_US
dc.subject.hlbtoplevel Science en_US
dc.owningcollname Dissertations and Theses (Ph.D. and Master's)
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