Peripheral isolates as sources of adaptive diversity under climate change

Macdonald, Stewart L., Llewelyn, John, Moritz, Craig, and Phillips, Ben L. (2017) Peripheral isolates as sources of adaptive diversity under climate change. Frontiers in Ecology and Evolution, 5.

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Abstract

As climate change progresses, there is increasing focus on the possibility of using targeted gene flow (TGF, the movement of pre-adapted individuals into declining populations) as a management tool. Targeted gene flow is a relatively cheap, low-risk management option, and will almost certainly come into increased use over the coming decades. Before such action can be taken, however, we need to know where to find pre-adapted individuals. We argue that, for many species, the obvious place to look for this diversity is in peripheral isolates: isolated populations at the current edges of a species’ range. Both evolutionary and ecological considerations suggest that the bulk of a species’ adaptive variationmay be contained in the total set of these peripheral isolates. Moreover, by exploring both volutionary and ecological perspectives it becomes clear that we should be able to assess the potential value of each isolate using remotely sensed data and three measurable axes of variation in patch traits: population size, connectivity, and climatic environment. Locating the “sweet spot” in this trait space, however, remains a challenge. Throughout, we illustrate these ideas using Australia’sWet Tropics rainforests as a model system.

Item ID: 52729
Item Type: Article (Research - C1)
ISSN: 2296-701X
Keywords: assisted gene flow; climate change; local adaptation; geographic variation; targeted gene flow
Additional Information:

© 2017 Macdonald, Llewelyn, Moritz and Phillips. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

Funders: Australian Research Council (ARC)
Projects and Grants: ARC DP1094646, ARC FL110100104, ARC DP
Date Deposited: 24 Apr 2018 01:25
FoR Codes: 06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060303 Biological Adaptation @ 100%
SEO Codes: 96 ENVIRONMENT > 9603 Climate and Climate Change > 960302 Climate Change Mitigation Strategies @ 100%
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