Who has the home team advantage? Applying community assembly rules to invasion - the seed predation filter

Thu, Oct 4, 3:35 pm
Location: 
304 Lewis Hall MSU
Speaker Name: 
Dean Pearson

 

Dean Pearson, Deputy Program Manager, Wildlife and Terrestrial Ecosystems, Rocky Mountain Research Station

Abstract: Community assembly theory poses that communities are structured by species passing through a series of abiotic and biotic filters that ultimately determine the composition and relative abundance of organisms within a community.  Yet exotic species invasions commonly result in virtual monocultures not normally found in natural conditions.  Hence, biological invasions seem to challenge the premise of community assembly theory or at least suggest that invaders may somehow break the rules that natives must follow.  Applying understandings of seed predation filters to exotic plant invasions illustrates that in situ filters may be used to explain the relative success of many exotic plant invasions (weakly to moderately successful invaders) and that understanding how some invaders break the rules may help to explain invasion outcomes for the more problematic, strong invaders.

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