Abstract:
:While we can usually understand the impacts of invasive species on recipient communities, invasion biology lacks methodologies that are potentially more predictive. Such tools should ideally be straightforward and widely applicable. Here, we explore an approach that compares the functional responses (FRs) of invader and native amphipod crustaceans. Dikerogammarus villosus is a Ponto-Caspian amphipod currently invading Europe and poised to invade North America. Compared with other amphipods that it actively replaces in freshwaters, D. villosus exhibited significantly greater predation, consuming significantly more prey with a higher type II FR. This corroborates the known dramatic field impacts of D. villosus on invaded communities. In another species, FRs were nearly identical in invasive and native ranges. We thus propose that if FRs of other taxa and trophic groups follow such general patterns, this methodology has potential in predicting future invasive species impacts.
journal_name
Biol Lettjournal_title
Biology lettersauthors
Bollache L,Dick JT,Farnsworth KD,Montgomery WIdoi
10.1098/rsbl.2007.0554subject
Has Abstractpub_date
2008-04-23 00:00:00pages
166-9issue
2eissn
1744-9561issn
1744-957Xpii
Q0022742L7115385journal_volume
4pub_type
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