Predicting range-shift success potential for tropical marine fishes using external morphology

Smith, Shannen M., Fox, Rebecca J., Donelson, Jennifer M., Head, Megan L., and Booth, David J. (2016) Predicting range-shift success potential for tropical marine fishes using external morphology. Biology Letters, 12 (9). pp. 1-5.

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Abstract

With global change accelerating the rate of species' range shifts, predicting which are most likely to establish viable populations in their new habitats is key to understanding how biological systems will respond. Annually, in Australia, tropical fish larvae from the Great Barrier Reef (GBR) are transported south via the East Australian Current (EAC), settling into temperate coastal habitats for the summer period, before experiencing near-100% mortality in winter. However, within 10 years, predicted winter ocean temperatures for the southeast coast of Australia will remain high enough for more of these so-called 'tropical vagrants' to survive over winter. We used a method of morphological niche analysis, previously shown to be an effective predictor of invasion success by fishes, to project which vagrants have the greatest likelihood of undergoing successful range shifts under these new climatic conditions. We find that species from the family of butterflyfishes (Chaetodontidae), and the moorish idol, Zanclus cornutus, are most likely to be able to exploit new niches within the ecosystem once physiological barriers to overwintering by tropical vagrant species are removed. Overall, the position of vagrants within the morphospace was strongly skewed, suggesting that impending competitive pressures may impact disproportionately on particular parts of the native community.

Item ID: 46570
Item Type: Article (Refereed Research - C1)
Keywords: biological invasion, climate change, coral reef fishes, morphological niche, tropicalization
ISSN: 1744-957X
Funders: Ian Potter Foundation (IPF), University of Technology, Sydney (UTS)
Research Data: http://dx.doi.org/10.5061/dryad.q0g60
Date Deposited: 05 Dec 2016 04:15
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060202 Community Ecology (excl Invasive Species Ecology) @ 65%
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 10%
06 BIOLOGICAL SCIENCES > 0699 Other Biological Sciences > 069902 Global Change Biology @ 25%
SEO Codes: 96 ENVIRONMENT > 9603 Climate and Climate Change > 960305 Ecosystem Adaptation to Climate Change @ 100%
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