NDLI: Island biogeography extends to small-scale habitats: low competitor density and richness on islands may drive trait variation in nonnative plants

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Island biogeography extends to small-scale habitats: low competitor density and richness on islands may drive trait variation in nonnative plants

Content Provider	Springer Nature Link
Author	Atwood, Joshua P. Meyerson, Laura A.
Copyright Year	2011
Abstract	Previous island biogeography studies have quantified species richness on the scale of entire islands rather than smaller scales relevant to plant-to-plant competitive interactions. Further, they have not accounted for density compensation. Using mainland and island sites along the New England coast, we asked two questions. First, are both richness and density lower in small-scale habitats within islands than in similar mainland habitats? Second, do differences in competitor richness and density drive post-establishment trait variation in nonnative plant species? We used field surveys and individual-based rarefaction to estimate richness and density in 100-m2 plots and demonstrated that island sites have significantly fewer species and individuals per unit area than mainland sites. We then conducted a field study in which we removed competing neighbors from nonnative plant individuals and found that when competitors were removed, individuals in low-competition environments demonstrated a lesser increase in vegetative growth but a greater increase in reproductive effort and herbivore tolerance relative to mainland individuals whose neighbors were also removed. We found that the central concept of island biogeography, i.e., that islands host fewer species than comparable mainland habitats, can be extended to smaller-scale habitats and that this difference in competitive pressure between mainland and island habitats can act as a driver of trait variation in nonnative plants.
Starting Page	2035
Ending Page	2043
Page Count	9
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	13
Issue Number	9
e-ISSN	15731464
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-05-17
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Density compensation ERCA EICA Invasive plants Plant ecology Neighbor removal Freshwater & Marine Ecology Developmental Biology Plant Sciences Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics

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