Impacts of ocean acidification on sea urchin growth across the juvenile to mature adult life-stage transition is mitigated by warming
Understanding how growth trajectories of calcifying invertebrates are affected by changing climate requires acclimation experiments that follow development across life-history transitions. In a long-term acclimation study, the effects of increased acidification and temperature on survival and growth...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
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Online Access: | https://epubs.scu.edu.au/esm_pubs/3481 https://doi.org/10.1098/rspb.2017.2684 |
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ftsoutherncu:oai:epubs.scu.edu.au:esm_pubs-4509 2023-05-15T17:51:44+02:00 Impacts of ocean acidification on sea urchin growth across the juvenile to mature adult life-stage transition is mitigated by warming Dworjanyn, Symon A Byrne, Maria 2018-01-01T08:00:00Z https://epubs.scu.edu.au/esm_pubs/3481 https://doi.org/10.1098/rspb.2017.2684 unknown ePublications@SCU School of Environment, Science and Engineering Papers climate change; life-history transition; ocean warming; sea urchin Environmental Sciences article 2018 ftsoutherncu https://doi.org/10.1098/rspb.2017.2684 2019-08-06T13:15:17Z Understanding how growth trajectories of calcifying invertebrates are affected by changing climate requires acclimation experiments that follow development across life-history transitions. In a long-term acclimation study, the effects of increased acidification and temperature on survival and growth of the tropical sea urchin Tripneustes gratilla from the early juvenile (5 mm test diameter-TD) through the developmental transition to the mature adult (60 mm TD) were investigated. Juveniles were reared in a combination of three temperature and three pH/pCO2 treatments, including treatments commensurate with global change projections. Elevated temperature and pCO2/pH both affected growth, but there was no interaction between these factors. The urchins grew more slowly at pH 7.6, but not at pH 7.8. Slow growth may be influenced by the inability to compensate coelomic fluid acid-base balance at pH 7.6. Growth was faster at +3 and +6°C compared to that in ambient temperature. Acidification and warming had strong and interactive effects on reproductive potential. Warming increased the gonad index, but acidification decreased it. At pH 7.6 there were virtually no gonads in any urchins regardless of temperature. The T. gratilla were larger at maturity under combined near-future warming and acidification scenarios (+3°C/pH 7.8). Although the juveniles grew and survived in near-future warming and acidification conditions, chronic exposure to these stressors from an early stage altered allocation to somatic and gonad growth. In the absence of phenotypic adjustment, the interactive effects of warming and acidification on the benthic life phases of sea urchins may compromise reproductive fitness and population maintenance as global climatic change unfolds. Article in Journal/Newspaper Ocean acidification Southern Cross University: epublications@SCU Proceedings of the Royal Society B: Biological Sciences 285 1876 20172684 |
institution |
Open Polar |
collection |
Southern Cross University: epublications@SCU |
op_collection_id |
ftsoutherncu |
language |
unknown |
topic |
climate change; life-history transition; ocean warming; sea urchin Environmental Sciences |
spellingShingle |
climate change; life-history transition; ocean warming; sea urchin Environmental Sciences Dworjanyn, Symon A Byrne, Maria Impacts of ocean acidification on sea urchin growth across the juvenile to mature adult life-stage transition is mitigated by warming |
topic_facet |
climate change; life-history transition; ocean warming; sea urchin Environmental Sciences |
description |
Understanding how growth trajectories of calcifying invertebrates are affected by changing climate requires acclimation experiments that follow development across life-history transitions. In a long-term acclimation study, the effects of increased acidification and temperature on survival and growth of the tropical sea urchin Tripneustes gratilla from the early juvenile (5 mm test diameter-TD) through the developmental transition to the mature adult (60 mm TD) were investigated. Juveniles were reared in a combination of three temperature and three pH/pCO2 treatments, including treatments commensurate with global change projections. Elevated temperature and pCO2/pH both affected growth, but there was no interaction between these factors. The urchins grew more slowly at pH 7.6, but not at pH 7.8. Slow growth may be influenced by the inability to compensate coelomic fluid acid-base balance at pH 7.6. Growth was faster at +3 and +6°C compared to that in ambient temperature. Acidification and warming had strong and interactive effects on reproductive potential. Warming increased the gonad index, but acidification decreased it. At pH 7.6 there were virtually no gonads in any urchins regardless of temperature. The T. gratilla were larger at maturity under combined near-future warming and acidification scenarios (+3°C/pH 7.8). Although the juveniles grew and survived in near-future warming and acidification conditions, chronic exposure to these stressors from an early stage altered allocation to somatic and gonad growth. In the absence of phenotypic adjustment, the interactive effects of warming and acidification on the benthic life phases of sea urchins may compromise reproductive fitness and population maintenance as global climatic change unfolds. |
format |
Article in Journal/Newspaper |
author |
Dworjanyn, Symon A Byrne, Maria |
author_facet |
Dworjanyn, Symon A Byrne, Maria |
author_sort |
Dworjanyn, Symon A |
title |
Impacts of ocean acidification on sea urchin growth across the juvenile to mature adult life-stage transition is mitigated by warming |
title_short |
Impacts of ocean acidification on sea urchin growth across the juvenile to mature adult life-stage transition is mitigated by warming |
title_full |
Impacts of ocean acidification on sea urchin growth across the juvenile to mature adult life-stage transition is mitigated by warming |
title_fullStr |
Impacts of ocean acidification on sea urchin growth across the juvenile to mature adult life-stage transition is mitigated by warming |
title_full_unstemmed |
Impacts of ocean acidification on sea urchin growth across the juvenile to mature adult life-stage transition is mitigated by warming |
title_sort |
impacts of ocean acidification on sea urchin growth across the juvenile to mature adult life-stage transition is mitigated by warming |
publisher |
ePublications@SCU |
publishDate |
2018 |
url |
https://epubs.scu.edu.au/esm_pubs/3481 https://doi.org/10.1098/rspb.2017.2684 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
School of Environment, Science and Engineering Papers |
op_doi |
https://doi.org/10.1098/rspb.2017.2684 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
285 |
container_issue |
1876 |
container_start_page |
20172684 |
_version_ |
1766158976514260992 |