Diatoms Dominate and Alter Marine Food-Webs When CO2 Rises
Diatoms are so important in ocean food-webs that any human induced changes in their abundance could have major effects on the ecology of our seas. The large chain-forming diatom Biddulphia biddulphiana greatly increases in abundance as pCO2 increases along natural seawater CO2 gradients in the north...
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ftmdpi:oai:mdpi.com:/1424-2818/11/12/242/ 2023-08-20T04:08:56+02:00 Diatoms Dominate and Alter Marine Food-Webs When CO2 Rises Ben P. Harvey Sylvain Agostini Koetsu Kon Shigeki Wada Jason M. Hall-Spencer agris 2019-12-16 application/pdf https://doi.org/10.3390/d11120242 EN eng Multidisciplinary Digital Publishing Institute Marine Diversity https://dx.doi.org/10.3390/d11120242 https://creativecommons.org/licenses/by/4.0/ Diversity; Volume 11; Issue 12; Pages: 242 ocean acidification benthic diatoms ecological shift CO 2 fertilisation turf algae habitat-forming algal blooms marine food-webs Text 2019 ftmdpi https://doi.org/10.3390/d11120242 2023-07-31T22:54:13Z Diatoms are so important in ocean food-webs that any human induced changes in their abundance could have major effects on the ecology of our seas. The large chain-forming diatom Biddulphia biddulphiana greatly increases in abundance as pCO2 increases along natural seawater CO2 gradients in the north Pacific Ocean. In areas with reference levels of pCO2, it was hard to find, but as seawater carbon dioxide levels rose, it replaced seaweeds and became the main habitat-forming species on the seabed. This diatom algal turf supported a marine invertebrate community that was much less diverse and completely differed from the benthic communities found at present-day levels of pCO2. Seawater CO2 enrichment stimulated the growth and photosynthetic efficiency of benthic diatoms, but reduced the abundance of calcified grazers such as gastropods and sea urchins. These observations suggest that ocean acidification will shift photic zone community composition so that coastal food-web structure and ecosystem function are homogenised, simplified, and more strongly affected by seasonal algal blooms. Text Ocean acidification MDPI Open Access Publishing Pacific Diversity 11 12 242 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
ocean acidification benthic diatoms ecological shift CO 2 fertilisation turf algae habitat-forming algal blooms marine food-webs |
spellingShingle |
ocean acidification benthic diatoms ecological shift CO 2 fertilisation turf algae habitat-forming algal blooms marine food-webs Ben P. Harvey Sylvain Agostini Koetsu Kon Shigeki Wada Jason M. Hall-Spencer Diatoms Dominate and Alter Marine Food-Webs When CO2 Rises |
topic_facet |
ocean acidification benthic diatoms ecological shift CO 2 fertilisation turf algae habitat-forming algal blooms marine food-webs |
description |
Diatoms are so important in ocean food-webs that any human induced changes in their abundance could have major effects on the ecology of our seas. The large chain-forming diatom Biddulphia biddulphiana greatly increases in abundance as pCO2 increases along natural seawater CO2 gradients in the north Pacific Ocean. In areas with reference levels of pCO2, it was hard to find, but as seawater carbon dioxide levels rose, it replaced seaweeds and became the main habitat-forming species on the seabed. This diatom algal turf supported a marine invertebrate community that was much less diverse and completely differed from the benthic communities found at present-day levels of pCO2. Seawater CO2 enrichment stimulated the growth and photosynthetic efficiency of benthic diatoms, but reduced the abundance of calcified grazers such as gastropods and sea urchins. These observations suggest that ocean acidification will shift photic zone community composition so that coastal food-web structure and ecosystem function are homogenised, simplified, and more strongly affected by seasonal algal blooms. |
format |
Text |
author |
Ben P. Harvey Sylvain Agostini Koetsu Kon Shigeki Wada Jason M. Hall-Spencer |
author_facet |
Ben P. Harvey Sylvain Agostini Koetsu Kon Shigeki Wada Jason M. Hall-Spencer |
author_sort |
Ben P. Harvey |
title |
Diatoms Dominate and Alter Marine Food-Webs When CO2 Rises |
title_short |
Diatoms Dominate and Alter Marine Food-Webs When CO2 Rises |
title_full |
Diatoms Dominate and Alter Marine Food-Webs When CO2 Rises |
title_fullStr |
Diatoms Dominate and Alter Marine Food-Webs When CO2 Rises |
title_full_unstemmed |
Diatoms Dominate and Alter Marine Food-Webs When CO2 Rises |
title_sort |
diatoms dominate and alter marine food-webs when co2 rises |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/d11120242 |
op_coverage |
agris |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Diversity; Volume 11; Issue 12; Pages: 242 |
op_relation |
Marine Diversity https://dx.doi.org/10.3390/d11120242 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/d11120242 |
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Diversity |
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11 |
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242 |
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