Key biological responses over two generations of the sea urchin Echinometra sp. A under future ocean conditions
Few studies have investigated the effects of ocean warming and acidification on marine benthic organisms over ecologically relevant time scales. We used an environmentally controlled coral reef mesocosm system to assess growth and physiological responses of the sea urchin species Echinometra sp. A o...
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Online Access: | https://espace.library.uq.edu.au/view/UQ:757e417 |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:757e417 2023-05-15T17:50:48+02:00 Key biological responses over two generations of the sea urchin Echinometra sp. A under future ocean conditions Uthicke, S. Patel, F. Karelitz, S. Luter, H. M. Webster, N. S. Lamare, M. 2020-03-05 https://espace.library.uq.edu.au/view/UQ:757e417 eng eng Inter-Research doi:10.3354/meps13236 issn:0171-8630 issn:1616-1599 orcid:0000-0002-4753-5278 Ocean acidification Ocean warming Climate scenarios Calcifying invertebrates Journal Article 2020 ftunivqespace https://doi.org/10.3354/meps13236 2020-12-08T08:23:44Z Few studies have investigated the effects of ocean warming and acidification on marine benthic organisms over ecologically relevant time scales. We used an environmentally controlled coral reef mesocosm system to assess growth and physiological responses of the sea urchin species Echinometra sp. A over 2 generations. Each mesocosm was controlled for temperature and pCO(2) over 29 mo under 3 climate change scenarios (present day and predicted states in 2050 and 2100 under RCP 8.5). The system maintained treatment conditions including annual temperature cycles and a daily variation in pCO(2). Over 20 mo, adult Echinometra exhibited no significant difference in size and weight among the treatments. Growth rates and respiration rates did not differ significantly among treatments. Urchins from the 2100 treatment had elevated ammonium excretion rates and reduced O-2:N ratios, suggesting a change in catabolism. We detected no difference in spawning index scores or oocyte size after 20 mo in the treatments, suggesting that gonad development was not impaired by variations in pCO(2) and temperature reflecting anticipated climate change scenarios. Larvae produced from experimentally exposed adults were successfully settled from all treatments and raised for 5 mo inside the mesocosm. The final size of these juveniles exhibited no significant difference among treatments. Overall, we demonstrated that the mesocosm system provided a near natural environment for this urchin species. Climate change and ocean acidification did not affect the benthic life stages investigated here. Importantly, in previous short-term (weeks to months) experiments, this species exhibited reductions in growth and gonad development, highlighting the potential for short-term experiments with non-acclimated animals to yield contrasting, possibly erroneous results. Article in Journal/Newspaper Ocean acidification The University of Queensland: UQ eSpace Marine Ecology Progress Series 637 87 101 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Ocean acidification Ocean warming Climate scenarios Calcifying invertebrates |
spellingShingle |
Ocean acidification Ocean warming Climate scenarios Calcifying invertebrates Uthicke, S. Patel, F. Karelitz, S. Luter, H. M. Webster, N. S. Lamare, M. Key biological responses over two generations of the sea urchin Echinometra sp. A under future ocean conditions |
topic_facet |
Ocean acidification Ocean warming Climate scenarios Calcifying invertebrates |
description |
Few studies have investigated the effects of ocean warming and acidification on marine benthic organisms over ecologically relevant time scales. We used an environmentally controlled coral reef mesocosm system to assess growth and physiological responses of the sea urchin species Echinometra sp. A over 2 generations. Each mesocosm was controlled for temperature and pCO(2) over 29 mo under 3 climate change scenarios (present day and predicted states in 2050 and 2100 under RCP 8.5). The system maintained treatment conditions including annual temperature cycles and a daily variation in pCO(2). Over 20 mo, adult Echinometra exhibited no significant difference in size and weight among the treatments. Growth rates and respiration rates did not differ significantly among treatments. Urchins from the 2100 treatment had elevated ammonium excretion rates and reduced O-2:N ratios, suggesting a change in catabolism. We detected no difference in spawning index scores or oocyte size after 20 mo in the treatments, suggesting that gonad development was not impaired by variations in pCO(2) and temperature reflecting anticipated climate change scenarios. Larvae produced from experimentally exposed adults were successfully settled from all treatments and raised for 5 mo inside the mesocosm. The final size of these juveniles exhibited no significant difference among treatments. Overall, we demonstrated that the mesocosm system provided a near natural environment for this urchin species. Climate change and ocean acidification did not affect the benthic life stages investigated here. Importantly, in previous short-term (weeks to months) experiments, this species exhibited reductions in growth and gonad development, highlighting the potential for short-term experiments with non-acclimated animals to yield contrasting, possibly erroneous results. |
format |
Article in Journal/Newspaper |
author |
Uthicke, S. Patel, F. Karelitz, S. Luter, H. M. Webster, N. S. Lamare, M. |
author_facet |
Uthicke, S. Patel, F. Karelitz, S. Luter, H. M. Webster, N. S. Lamare, M. |
author_sort |
Uthicke, S. |
title |
Key biological responses over two generations of the sea urchin Echinometra sp. A under future ocean conditions |
title_short |
Key biological responses over two generations of the sea urchin Echinometra sp. A under future ocean conditions |
title_full |
Key biological responses over two generations of the sea urchin Echinometra sp. A under future ocean conditions |
title_fullStr |
Key biological responses over two generations of the sea urchin Echinometra sp. A under future ocean conditions |
title_full_unstemmed |
Key biological responses over two generations of the sea urchin Echinometra sp. A under future ocean conditions |
title_sort |
key biological responses over two generations of the sea urchin echinometra sp. a under future ocean conditions |
publisher |
Inter-Research |
publishDate |
2020 |
url |
https://espace.library.uq.edu.au/view/UQ:757e417 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
doi:10.3354/meps13236 issn:0171-8630 issn:1616-1599 orcid:0000-0002-4753-5278 |
op_doi |
https://doi.org/10.3354/meps13236 |
container_title |
Marine Ecology Progress Series |
container_volume |
637 |
container_start_page |
87 |
op_container_end_page |
101 |
_version_ |
1766157695391367168 |