There's no place like home: crown-of-thorns outbreaks in the central pacific are regionally derived and independent events.

One of the most significant biological disturbances on a tropical coral reef is a population outbreak of the fecund, corallivorous crown-of-thorns sea star, Acanthaster planci. Although the factors that trigger an initial outbreak may vary, successive outbreaks within and across regions are assumed...

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Autores principales:	Molly A Timmers, Christopher E Bird, Derek J Skillings, Peter E Smouse, Robert J Toonen
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9309203ad9fb4ff9834b7c463ed7e8d6
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spelling	oai:doaj.org-article:9309203ad9fb4ff9834b7c463ed7e8d62021-11-18T07:27:39ZThere's no place like home: crown-of-thorns outbreaks in the central pacific are regionally derived and independent events.1932-620310.1371/journal.pone.0031159https://doaj.org/article/9309203ad9fb4ff9834b7c463ed7e8d62012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22363570/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203One of the most significant biological disturbances on a tropical coral reef is a population outbreak of the fecund, corallivorous crown-of-thorns sea star, Acanthaster planci. Although the factors that trigger an initial outbreak may vary, successive outbreaks within and across regions are assumed to spread via the planktonic larvae released from a primary outbreak. This secondary outbreak hypothesis is predominantly based on the high dispersal potential of A. planci and the assertion that outbreak populations (a rogue subset of the larger population) are genetically more similar to each other than they are to low-density non-outbreak populations. Here we use molecular techniques to evaluate the spatial scale at which A. planci outbreaks can propagate via larval dispersal in the central Pacific Ocean by inferring the location and severity of gene flow restrictions from the analysis of mtDNA control region sequence (656 specimens, 17 non-outbreak and six outbreak locations, six archipelagos, and three regions). Substantial regional, archipelagic, and subarchipelagic-scale genetic structuring of A. planci populations indicate that larvae rarely realize their dispersal potential and outbreaks in the central Pacific do not spread across the expanses of open ocean. On a finer scale, genetic partitioning was detected within two of three islands with multiple sampling sites. The finest spatial structure was detected at Pearl & Hermes Atoll, between the lagoon and forereef habitats (<10 km). Despite using a genetic marker capable of revealing subtle partitioning, we found no evidence that outbreaks were a rogue genetic subset of a greater population. Overall, outbreaks that occur at similar times across population partitions are genetically independent and likely due to nutrient inputs and similar climatic and ecological conditions that conspire to fuel plankton blooms.Molly A TimmersChristopher E BirdDerek J SkillingsPeter E SmouseRobert J ToonenPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 2, p e31159 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Molly A Timmers Christopher E Bird Derek J Skillings Peter E Smouse Robert J Toonen There's no place like home: crown-of-thorns outbreaks in the central pacific are regionally derived and independent events.
description	One of the most significant biological disturbances on a tropical coral reef is a population outbreak of the fecund, corallivorous crown-of-thorns sea star, Acanthaster planci. Although the factors that trigger an initial outbreak may vary, successive outbreaks within and across regions are assumed to spread via the planktonic larvae released from a primary outbreak. This secondary outbreak hypothesis is predominantly based on the high dispersal potential of A. planci and the assertion that outbreak populations (a rogue subset of the larger population) are genetically more similar to each other than they are to low-density non-outbreak populations. Here we use molecular techniques to evaluate the spatial scale at which A. planci outbreaks can propagate via larval dispersal in the central Pacific Ocean by inferring the location and severity of gene flow restrictions from the analysis of mtDNA control region sequence (656 specimens, 17 non-outbreak and six outbreak locations, six archipelagos, and three regions). Substantial regional, archipelagic, and subarchipelagic-scale genetic structuring of A. planci populations indicate that larvae rarely realize their dispersal potential and outbreaks in the central Pacific do not spread across the expanses of open ocean. On a finer scale, genetic partitioning was detected within two of three islands with multiple sampling sites. The finest spatial structure was detected at Pearl & Hermes Atoll, between the lagoon and forereef habitats (<10 km). Despite using a genetic marker capable of revealing subtle partitioning, we found no evidence that outbreaks were a rogue genetic subset of a greater population. Overall, outbreaks that occur at similar times across population partitions are genetically independent and likely due to nutrient inputs and similar climatic and ecological conditions that conspire to fuel plankton blooms.
format	article
author	Molly A Timmers Christopher E Bird Derek J Skillings Peter E Smouse Robert J Toonen
author_facet	Molly A Timmers Christopher E Bird Derek J Skillings Peter E Smouse Robert J Toonen
author_sort	Molly A Timmers
title	There's no place like home: crown-of-thorns outbreaks in the central pacific are regionally derived and independent events.
title_short	There's no place like home: crown-of-thorns outbreaks in the central pacific are regionally derived and independent events.
title_full	There's no place like home: crown-of-thorns outbreaks in the central pacific are regionally derived and independent events.
title_fullStr	There's no place like home: crown-of-thorns outbreaks in the central pacific are regionally derived and independent events.
title_full_unstemmed	There's no place like home: crown-of-thorns outbreaks in the central pacific are regionally derived and independent events.
title_sort	there's no place like home: crown-of-thorns outbreaks in the central pacific are regionally derived and independent events.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/9309203ad9fb4ff9834b7c463ed7e8d6
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There's no place like home: crown-of-thorns outbreaks in the central pacific are regionally derived and independent events.

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