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 CO 2 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 i...
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Online Access: | https://doi.org/10.1111/gcb.14467 http://www.ncbi.nlm.nih.gov/pubmed/30295390 http://ecite.utas.edu.au/129493 |
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ftunivtasecite:oai:ecite.utas.edu.au:129493 2023-05-15T17:49:33+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://doi.org/10.1111/gcb.14467 http://www.ncbi.nlm.nih.gov/pubmed/30295390 http://ecite.utas.edu.au/129493 en eng Blackwell Publishing Ltd http://dx.doi.org/10.1111/gcb.14467 Xu, D and Brennan, G and Xu, L and Zhang, XW and Fan, X and Han, WT and Mock, T and McMinn, A and Hutchins, DA and Ye, N, Ocean acidification increases iodine accumulation in kelp-based coastal food webs, Global Change Biology, 25, (2) pp. 629-639. ISSN 1354-1013 (2018) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/30295390 http://ecite.utas.edu.au/129493 Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Refereed Article PeerReviewed 2018 ftunivtasecite https://doi.org/10.1111/gcb.14467 2019-12-13T22:27:37Z Kelp are main iodine accumulators in the ocean, and their growth and photosynthesis are likely to benefit from elevated seawater CO 2 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 p CO 2 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 p CO 2 , 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 eCite UTAS (University of Tasmania) Global Change Biology 25 2 629 639 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) 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 |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
description |
Kelp are main iodine accumulators in the ocean, and their growth and photosynthesis are likely to benefit from elevated seawater CO 2 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 p CO 2 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 p CO 2 , 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://doi.org/10.1111/gcb.14467 http://www.ncbi.nlm.nih.gov/pubmed/30295390 http://ecite.utas.edu.au/129493 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://dx.doi.org/10.1111/gcb.14467 Xu, D and Brennan, G and Xu, L and Zhang, XW and Fan, X and Han, WT and Mock, T and McMinn, A and Hutchins, DA and Ye, N, Ocean acidification increases iodine accumulation in kelp-based coastal food webs, Global Change Biology, 25, (2) pp. 629-639. ISSN 1354-1013 (2018) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/30295390 http://ecite.utas.edu.au/129493 |
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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1766155923308412928 |