The population genetic structure of the urchin Centrostephanus rodgersii in New Zealand with links to Australia

dc.contributor.authorThomas LJ
dc.contributor.authorLiggins L
dc.contributor.authorBanks SC
dc.contributor.authorBeheregaray LB
dc.contributor.authorLiddy M
dc.contributor.authorMcCulloch GA
dc.contributor.authorWaters JM
dc.contributor.authorCarter L
dc.contributor.authorByrne M
dc.contributor.authorCumming RA
dc.contributor.authorLamare MD
dc.description© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2021
dc.description.abstractThe diadematid sea urchin Centrostephanus rodgersii occurs in Australia and New Zealand and has undergone recent southward range extension in Australia as a result of regional warming. Clarifying the population genetic structure of this species across its New Zealand range would allow a better understanding of recent and future mechanisms driving range changes in the species. Here, we use microsatellite DNA data to assess connectivity and genetic structure in 385 individuals from 14 locations across the Australian and New Zealand ranges of the species. We detected substantial genetic differentiation among C. rodgersii populations from Australia and New Zealand. However, the population from Port Stephens (located north of Newcastle), Australia, strongly clustered with New Zealand samples. This suggests that the New Zealand populations recently originated from this area, likely via larval transport in the Tasman Front flow that arises in this region. The weak population genetic structure and relatively low genetic diversity detected in New Zealand (global Fst = 0.0021) relative to Australia (global Fst = 0.0339) is consistent with the former population’s inferred history of recent climate-driven expansion. Population-level inbreeding is low in most populations, but were higher in New Zealand (global Fis = 0.0833) than in Australia (global Fis = 0.0202), suggesting that self-recruitment is playing an increasingly important role in the New Zealand region. Our results suggest that C. rodgersii is likely to spread southwards as ocean temperatures increase; therefore, it is crucial that researchers develop a clearer understanding of how New Zealand ecosystems will be reshaped by this species (and others) under climate change.
dc.identifierARTN 138
dc.identifier.citationMARINE BIOLOGY, 2021, 168 (9)
dc.relation.isPartOfMARINE BIOLOGY
dc.rightsCC BY
dc.subject.anzsrc05 Environmental Sciences
dc.subject.anzsrc06 Biological Sciences
dc.subject.anzsrc07 Agricultural and Veterinary Sciences
dc.titleThe population genetic structure of the urchin Centrostephanus rodgersii in New Zealand with links to Australia
dc.typeJournal article
pubs.notesNot known
pubs.organisational-group/Massey University
pubs.organisational-group/Massey University/College of Sciences
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