Temperate macroalgae impacts tropical fish recruitment at forefronts of range expansion

Beck, HJ; Feary, DA; Nakamura, Y; Booth, DJ

Temperate macroalgae impacts tropical fish recruitment at forefronts of range expansion

Beck, HJ Feary, DA Nakamura, Y Booth, DJ

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Publication Type:: Journal Article
Citation:: Coral Reefs, 2017, 36 (2), pp. 639 - 651
Issue Date:: 2017-06-01

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Field	Value	Language
dc.contributor.author	Beck, HJ	en_US
dc.contributor.author	Feary, DA	en_US
dc.contributor.author	Nakamura, Y	en_US
dc.contributor.author	Booth, DJ https://orcid.org/0000-0002-8256-1412	en_US
dc.date.available	2020-05-25T19:03:25Z
dc.date.issued	2017-06-01	en_US
dc.identifier.citation	Coral Reefs, 2017, 36 (2), pp. 639 - 651	en_US
dc.identifier.issn	0722-4028	en_US
dc.identifier.uri	http://hdl.handle.net/10453/84738
dc.description.abstract	© 2017, Springer-Verlag Berlin Heidelberg. Warming waters and changing ocean currents are increasing the supply of tropical fish larvae to temperature regions where they are exposed to novel habitats, namely temperate macroalgae and barren reefs. Here, we use underwater surveys on the temperate reefs of south-eastern (SE) Australia and western Japan (~33.5°N and S, respectively) to investigate how temperate macroalgal and non-macroalgal habitats influence recruitment success of a range of tropical fishes. We show that temperate macroalgae strongly affected recruitment of many tropical fish species in both regions and across three recruitment seasons in SE Australia. Densities and richness of recruiting tropical fishes, primarily planktivores and herbivores, were over seven times greater in non-macroalgal than macroalgal reef habitat. Species and trophic diversity (K-dominance) were also greater in non-macroalgal habitat. Temperate macroalgal cover was a stronger predictor of tropical fish assemblages than temperate fish assemblages, reef rugosities or wave exposure. Tropical fish richness, diversity and density were greater on barren reef than on reef dominated by turfing algae. One common species, the neon damselfish (Pomacentrus coelestis), chose non-macroalgal habitat over temperate macroalgae for settlement in an aquarium experiment. This study highlights that temperate macroalgae may partly account for spatial variation in recruitment success of many tropical fishes into higher latitudes. Hence, habitat composition of temperate reefs may need to be considered to accurately predict the geographic responses of many tropical fishes to climate change.	en_US
dc.relation.ispartof	Coral Reefs	en_US
dc.relation.isbasedon	10.1007/s00338-017-1553-1	en_US
dc.subject.classification	Marine Biology & Hydrobiology	en_US
dc.title	Temperate macroalgae impacts tropical fish recruitment at forefronts of range expansion	en_US
dc.type	Journal Article
utslib.citation.volume	2	en_US
utslib.citation.volume	36	en_US
utslib.for	0405 Oceanography	en_US
utslib.for	0501 Ecological Applications	en_US
utslib.for	0602 Ecology	en_US
utslib.for	04 Earth Sciences	en_US
utslib.for	05 Environmental Sciences	en_US
utslib.for	06 Biological Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	open_access
pubs.issue	2	en_US
pubs.publication-status	Published	en_US
pubs.volume	36	en_US

Abstract:

© 2017, Springer-Verlag Berlin Heidelberg. Warming waters and changing ocean currents are increasing the supply of tropical fish larvae to temperature regions where they are exposed to novel habitats, namely temperate macroalgae and barren reefs. Here, we use underwater surveys on the temperate reefs of south-eastern (SE) Australia and western Japan (~33.5°N and S, respectively) to investigate how temperate macroalgal and non-macroalgal habitats influence recruitment success of a range of tropical fishes. We show that temperate macroalgae strongly affected recruitment of many tropical fish species in both regions and across three recruitment seasons in SE Australia. Densities and richness of recruiting tropical fishes, primarily planktivores and herbivores, were over seven times greater in non-macroalgal than macroalgal reef habitat. Species and trophic diversity (K-dominance) were also greater in non-macroalgal habitat. Temperate macroalgal cover was a stronger predictor of tropical fish assemblages than temperate fish assemblages, reef rugosities or wave exposure. Tropical fish richness, diversity and density were greater on barren reef than on reef dominated by turfing algae. One common species, the neon damselfish (Pomacentrus coelestis), chose non-macroalgal habitat over temperate macroalgae for settlement in an aquarium experiment. This study highlights that temperate macroalgae may partly account for spatial variation in recruitment success of many tropical fishes into higher latitudes. Hence, habitat composition of temperate reefs may need to be considered to accurately predict the geographic responses of many tropical fishes to climate change.

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http://hdl.handle.net/10453/84738