Ecology, Environment and Conservation
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Researchers from University of London, Imperial College discuss findings in ecology
May 22nd, 2009
"Trait-mediated indirect effects can have important effects on food web dynamics but are still poorly understood in the field. In a previous population cage study of a small community of aphids and an aphid natural enemy it was found that a trait-mediated indirect effect involving the natural enemy's behaviour was key to understanding community persistence," scientists writing in the journal Oecologia report.
"Here evidence is presented that a related phenomenon involving some of the same species occurs in the field. Surveys showed that two species of aphid (Acyrthosiphon pisum and Megourella purpurea) tended to share a host plant with a third generally unpalatable...
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Source: Ecology, Environment and Conservation (2009-05-22)