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Impacts of Ocean Acidification on Early Life-History Stages and Settlement of the Coral-Eating Sea Star Acanthaster planci
Coral reefs are marine biodiversity hotspots, but their existence is threatened by global change and local pressures such as land-runoff and overfishing. Population explosions of coral-eating crown of thorns sea stars (COTS) are a major contributor to recent decline in coral cover on the Great Barri...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Public Library of Science
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3865153/ https://www.ncbi.nlm.nih.gov/pubmed/24358240 http://dx.doi.org/10.1371/journal.pone.0082938 |
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author | Uthicke, Sven Pecorino, Danilo Albright, Rebecca Negri, Andrew Peter Cantin, Neal Liddy, Michelle Dworjanyn, Symon Kamya, Pamela Byrne, Maria Lamare, Miles |
author_facet | Uthicke, Sven Pecorino, Danilo Albright, Rebecca Negri, Andrew Peter Cantin, Neal Liddy, Michelle Dworjanyn, Symon Kamya, Pamela Byrne, Maria Lamare, Miles |
author_sort | Uthicke, Sven |
collection | PubMed |
description | Coral reefs are marine biodiversity hotspots, but their existence is threatened by global change and local pressures such as land-runoff and overfishing. Population explosions of coral-eating crown of thorns sea stars (COTS) are a major contributor to recent decline in coral cover on the Great Barrier Reef. Here, we investigate how projected near-future ocean acidification (OA) conditions can affect early life history stages of COTS, by investigating important milestones including sperm motility, fertilisation rates, and larval development and settlement. OA (increased pCO(2) to 900–1200 µatm pCO(2)) significantly reduced sperm motility and, to a lesser extent, velocity, which strongly reduced fertilization rates at environmentally relevant sperm concentrations. Normal development of 10 d old larvae was significantly lower under elevated pCO(2) but larval size was not significantly different between treatments. Settlement of COTS larvae was significantly reduced on crustose coralline algae (known settlement inducers of COTS) that had been exposed to OA conditions for 85 d prior to settlement assays. Effect size analyses illustrated that reduced settlement may be the largest bottleneck for overall juvenile production. Results indicate that reductions in fertilisation and settlement success alone would reduce COTS population replenishment by over 50%. However, it is unlikely that this effect is sufficient to provide respite for corals from other negative anthropogenic impacts and direct stress from OA and warming on corals. |
format | Online Article Text |
id | pubmed-3865153 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-38651532013-12-19 Impacts of Ocean Acidification on Early Life-History Stages and Settlement of the Coral-Eating Sea Star Acanthaster planci Uthicke, Sven Pecorino, Danilo Albright, Rebecca Negri, Andrew Peter Cantin, Neal Liddy, Michelle Dworjanyn, Symon Kamya, Pamela Byrne, Maria Lamare, Miles PLoS One Research Article Coral reefs are marine biodiversity hotspots, but their existence is threatened by global change and local pressures such as land-runoff and overfishing. Population explosions of coral-eating crown of thorns sea stars (COTS) are a major contributor to recent decline in coral cover on the Great Barrier Reef. Here, we investigate how projected near-future ocean acidification (OA) conditions can affect early life history stages of COTS, by investigating important milestones including sperm motility, fertilisation rates, and larval development and settlement. OA (increased pCO(2) to 900–1200 µatm pCO(2)) significantly reduced sperm motility and, to a lesser extent, velocity, which strongly reduced fertilization rates at environmentally relevant sperm concentrations. Normal development of 10 d old larvae was significantly lower under elevated pCO(2) but larval size was not significantly different between treatments. Settlement of COTS larvae was significantly reduced on crustose coralline algae (known settlement inducers of COTS) that had been exposed to OA conditions for 85 d prior to settlement assays. Effect size analyses illustrated that reduced settlement may be the largest bottleneck for overall juvenile production. Results indicate that reductions in fertilisation and settlement success alone would reduce COTS population replenishment by over 50%. However, it is unlikely that this effect is sufficient to provide respite for corals from other negative anthropogenic impacts and direct stress from OA and warming on corals. Public Library of Science 2013-12-16 /pmc/articles/PMC3865153/ /pubmed/24358240 http://dx.doi.org/10.1371/journal.pone.0082938 Text en © 2013 Uthicke et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Uthicke, Sven Pecorino, Danilo Albright, Rebecca Negri, Andrew Peter Cantin, Neal Liddy, Michelle Dworjanyn, Symon Kamya, Pamela Byrne, Maria Lamare, Miles Impacts of Ocean Acidification on Early Life-History Stages and Settlement of the Coral-Eating Sea Star Acanthaster planci |
title | Impacts of Ocean Acidification on Early Life-History Stages and Settlement of the Coral-Eating Sea Star Acanthaster planci
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title_full | Impacts of Ocean Acidification on Early Life-History Stages and Settlement of the Coral-Eating Sea Star Acanthaster planci
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title_fullStr | Impacts of Ocean Acidification on Early Life-History Stages and Settlement of the Coral-Eating Sea Star Acanthaster planci
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title_full_unstemmed | Impacts of Ocean Acidification on Early Life-History Stages and Settlement of the Coral-Eating Sea Star Acanthaster planci
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title_short | Impacts of Ocean Acidification on Early Life-History Stages and Settlement of the Coral-Eating Sea Star Acanthaster planci
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title_sort | impacts of ocean acidification on early life-history stages and settlement of the coral-eating sea star acanthaster planci |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3865153/ https://www.ncbi.nlm.nih.gov/pubmed/24358240 http://dx.doi.org/10.1371/journal.pone.0082938 |
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