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      Patch area, population density and the scaling of migration rates: the resource concentration hypothesis revisited : Density-area relations in sources and sinks

        ,
      Ecology Letters
      Wiley-Blackwell

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          Organization of a Plant-Arthropod Association in Simple and Diverse Habitats: The Fauna of Collards (Brassica Oleracea)

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            Habitat fragmentation, species loss, and biological control.

            Fragmentation of habitats in the agricultural landscape is a major threat to biological diversity, which is greatly determined by insects. Isolation of habitat fragments resulted in decreased numbers of species as well as reduced effects of natural enemies. Manually established islands of red clover were colonized by most available herbivore species but few parasitoid species. Thus, herbivores were greatly released from parasitism, experiencing only 19 to 60 percent of the parasitism of nonisolated populations. Species failing to successfully colonize isolated islands were characterized by small and highly variable populations. Accordingly, lack of habitat connectivity released insects from predator control.
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              Landscape Patterns in a Disturbed Environment

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                Author and article information

                Journal
                Ecology Letters
                Wiley-Blackwell
                1461023X
                October 2005
                October 2005
                : 8
                : 10
                : 1057-1065
                Article
                10.1111/j.1461-0248.2005.00811.x
                e48bffbe-8f55-46db-ac34-e2af76dd0418
                © 2005

                http://doi.wiley.com/10.1002/tdm_license_1.1

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