Functional responses can’t unify invasion ecology

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Date
2017Author
Vonesh, J.
McCoy, M.
Altwegg, R.
Landi, P.
Measey, J.
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Dick et al. (Biol Invasions, 2017) propose
that the comparative functional response framework provides a unifying approach for the study of invasive species. We agree that functional responses are an important and powerful quantitative description of
consumer effects on resources, and co-opting classical ecological theory to better predict invasive species impacts is a laudable move for invasion biology. However, we fear that the early successes of select
examples of the comparative functional response (CFR) approach has led Dick et al. to exaggerate the generality of its utility, and about its ability to unify the field. Further, they fail to provide a convincing
argument why CFR is better than existing tools such as invasion history or impact indices, even when considering emerging or potential invaders. In this response we provide details of three conceptual issues
stemming from classical ecological theoretical frameworks and two practical problems that Dick et al. and other CFR proponents need to address.
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- RESEARCH: CIB Associates [215]
- RESEARCH: Measey, J [83]