Ocean acidification increases iodine accumulation in kelp‐based coastal food webs
Kelp are main iodine accumulators in the ocean, and their growth and photosynthesis are likely to benefit from elevated seawater CO2 levels due to ocean acidification. However, there are currently no data on the effects of ocean acidification on iodine metabolism in kelp. As key primary producers in...
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Blackwell Publishing Ltd
2018
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ftunivtasmania:oai:eprints.utas.edu.au:29010 2023-05-15T17:49:15+02:00 Ocean acidification increases iodine accumulation in kelp‐based coastal food webs Xu, D Brennan, G Xu, L Zhang, XW Fan, X Han, WT Mock, T McMinn, A Hutchins, DA Ye, N 2018 https://eprints.utas.edu.au/29010/ unknown Blackwell Publishing Ltd Xu, D, Brennan, G, Xu, L, Zhang, XW, Fan, X, Han, WT, Mock, T, McMinn, A orcid:0000-0002-2133-3854 , Hutchins, DA and Ye, N 2018 , 'Ocean acidification increases iodine accumulation in kelp‐based coastal food webs' , Global Change Biology , pp. 1-11 , doi:10.1111/gcb.14467 <http://dx.doi.org/10.1111/gcb.14467>. iodine kelp iodine metabolism ocean acidification Saccharina japonica thyroid hormone vanadium-dependent haloperoxidase Article PeerReviewed 2018 ftunivtasmania https://doi.org/10.1111/gcb.14467 2021-09-13T22:19:04Z Kelp are main iodine accumulators in the ocean, and their growth and photosynthesis are likely to benefit from elevated seawater CO2 levels due to ocean acidification. However, there are currently no data on the effects of ocean acidification on iodine metabolism in kelp. As key primary producers in coastal ecosystems worldwide, any change in their iodine metabolism caused by climate change will potentially have important consequences for global geochemical cycles of iodine, including iodine levels of coastal food webs that underpin the nutrition of billions of humans around the world. Here, we found that elevated pCO2 enhanced growth and increased iodine accumulation not only in the model kelp Saccharina japonica using both short‐term laboratory experiment and long‐term in situ mesocosms, but also in several other edible and ecologically significant seaweeds using long‐term in situ mesocosms. Transcriptomic and proteomic analysis of S. japonica revealed that most vanadium‐dependent haloperoxidase genes involved in iodine efflux during oxidative stress are down‐regulated under increasing pCO2, suggesting that ocean acidification alleviates oxidative stress in kelp, which might contribute to their enhanced growth. When consumed by abalone (Haliotis discus), elevated iodine concentrations in S. japonica caused increased iodine accumulation in abalone, accompanied by reduced synthesis of thyroid hormones. Thus, our results suggest that kelp will benefit from ocean acidification by a reduction in environmental stress however; iodine levels, in kelp‐based coastal food webs will increase, with potential impacts on biogeochemical cycles of iodine in coastal ecosystems. Article in Journal/Newspaper Ocean acidification University of Tasmania: UTas ePrints Global Change Biology 25 2 629 639 |
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Open Polar |
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University of Tasmania: UTas ePrints |
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ftunivtasmania |
language |
unknown |
topic |
iodine kelp iodine metabolism ocean acidification Saccharina japonica thyroid hormone vanadium-dependent haloperoxidase |
spellingShingle |
iodine kelp iodine metabolism ocean acidification Saccharina japonica thyroid hormone vanadium-dependent haloperoxidase Xu, D Brennan, G Xu, L Zhang, XW Fan, X Han, WT Mock, T McMinn, A Hutchins, DA Ye, N Ocean acidification increases iodine accumulation in kelp‐based coastal food webs |
topic_facet |
iodine kelp iodine metabolism ocean acidification Saccharina japonica thyroid hormone vanadium-dependent haloperoxidase |
description |
Kelp are main iodine accumulators in the ocean, and their growth and photosynthesis are likely to benefit from elevated seawater CO2 levels due to ocean acidification. However, there are currently no data on the effects of ocean acidification on iodine metabolism in kelp. As key primary producers in coastal ecosystems worldwide, any change in their iodine metabolism caused by climate change will potentially have important consequences for global geochemical cycles of iodine, including iodine levels of coastal food webs that underpin the nutrition of billions of humans around the world. Here, we found that elevated pCO2 enhanced growth and increased iodine accumulation not only in the model kelp Saccharina japonica using both short‐term laboratory experiment and long‐term in situ mesocosms, but also in several other edible and ecologically significant seaweeds using long‐term in situ mesocosms. Transcriptomic and proteomic analysis of S. japonica revealed that most vanadium‐dependent haloperoxidase genes involved in iodine efflux during oxidative stress are down‐regulated under increasing pCO2, suggesting that ocean acidification alleviates oxidative stress in kelp, which might contribute to their enhanced growth. When consumed by abalone (Haliotis discus), elevated iodine concentrations in S. japonica caused increased iodine accumulation in abalone, accompanied by reduced synthesis of thyroid hormones. Thus, our results suggest that kelp will benefit from ocean acidification by a reduction in environmental stress however; iodine levels, in kelp‐based coastal food webs will increase, with potential impacts on biogeochemical cycles of iodine in coastal ecosystems. |
format |
Article in Journal/Newspaper |
author |
Xu, D Brennan, G Xu, L Zhang, XW Fan, X Han, WT Mock, T McMinn, A Hutchins, DA Ye, N |
author_facet |
Xu, D Brennan, G Xu, L Zhang, XW Fan, X Han, WT Mock, T McMinn, A Hutchins, DA Ye, N |
author_sort |
Xu, D |
title |
Ocean acidification increases iodine accumulation in kelp‐based coastal food webs |
title_short |
Ocean acidification increases iodine accumulation in kelp‐based coastal food webs |
title_full |
Ocean acidification increases iodine accumulation in kelp‐based coastal food webs |
title_fullStr |
Ocean acidification increases iodine accumulation in kelp‐based coastal food webs |
title_full_unstemmed |
Ocean acidification increases iodine accumulation in kelp‐based coastal food webs |
title_sort |
ocean acidification increases iodine accumulation in kelp‐based coastal food webs |
publisher |
Blackwell Publishing Ltd |
publishDate |
2018 |
url |
https://eprints.utas.edu.au/29010/ |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Xu, D, Brennan, G, Xu, L, Zhang, XW, Fan, X, Han, WT, Mock, T, McMinn, A orcid:0000-0002-2133-3854 , Hutchins, DA and Ye, N 2018 , 'Ocean acidification increases iodine accumulation in kelp‐based coastal food webs' , Global Change Biology , pp. 1-11 , doi:10.1111/gcb.14467 <http://dx.doi.org/10.1111/gcb.14467>. |
op_doi |
https://doi.org/10.1111/gcb.14467 |
container_title |
Global Change Biology |
container_volume |
25 |
container_issue |
2 |
container_start_page |
629 |
op_container_end_page |
639 |
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1766155517596532736 |