Global declines in oceanic nitrification rates as a consequence of ocean acidification
Ocean acidification produced by dissolution of anthropogenic carbon dioxide (CO2) emissions in seawater has profound consequences for marine ecology and biogeochemistry. The oceans have absorbed one-third of CO2 emissions over the past two centuries, altering ocean chemistry, reducing seawater pH, a...
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ftpubmed:oai:pubmedcentral.nih.gov:3017153 2023-05-15T17:49:47+02:00 Global declines in oceanic nitrification rates as a consequence of ocean acidification Beman, J. Michael Chow, Cheryl-Emiliane King, Andrew L. Feng, Yuanyuan Fuhrman, Jed A. Andersson, Andreas Bates, Nicholas R. Popp, Brian N. Hutchins, David A. 2011-01-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3017153 http://www.ncbi.nlm.nih.gov/pubmed/21173255 https://doi.org/10.1073/pnas.1011053108 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3017153 http://www.ncbi.nlm.nih.gov/pubmed/21173255 http://dx.doi.org/10.1073/pnas.1011053108 Biological Sciences Text 2011 ftpubmed https://doi.org/10.1073/pnas.1011053108 2013-09-03T09:43:01Z Ocean acidification produced by dissolution of anthropogenic carbon dioxide (CO2) emissions in seawater has profound consequences for marine ecology and biogeochemistry. The oceans have absorbed one-third of CO2 emissions over the past two centuries, altering ocean chemistry, reducing seawater pH, and affecting marine animals and phytoplankton in multiple ways. Microbially mediated ocean biogeochemical processes will be pivotal in determining how the earth system responds to global environmental change; however, how they may be altered by ocean acidification is largely unknown. We show here that microbial nitrification rates decreased in every instance when pH was experimentally reduced (by 0.05–0.14) at multiple locations in the Atlantic and Pacific Oceans. Nitrification is a central process in the nitrogen cycle that produces both the greenhouse gas nitrous oxide and oxidized forms of nitrogen used by phytoplankton and other microorganisms in the sea; at the Bermuda Atlantic Time Series and Hawaii Ocean Time-series sites, experimental acidification decreased ammonia oxidation rates by 38% and 36%. Ammonia oxidation rates were also strongly and inversely correlated with pH along a gradient produced in the oligotrophic Sargasso Sea (r2 = 0.87, P < 0.05). Across all experiments, rates declined by 8–38% in low pH treatments, and the greatest absolute decrease occurred where rates were highest off the California coast. Collectively our results suggest that ocean acidification could reduce nitrification rates by 3–44% within the next few decades, affecting oceanic nitrous oxide production, reducing supplies of oxidized nitrogen in the upper layers of the ocean, and fundamentally altering nitrogen cycling in the sea. Text Ocean acidification PubMed Central (PMC) Pacific Proceedings of the National Academy of Sciences 108 1 208 213 |
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Biological Sciences Beman, J. Michael Chow, Cheryl-Emiliane King, Andrew L. Feng, Yuanyuan Fuhrman, Jed A. Andersson, Andreas Bates, Nicholas R. Popp, Brian N. Hutchins, David A. Global declines in oceanic nitrification rates as a consequence of ocean acidification |
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Biological Sciences |
description |
Ocean acidification produced by dissolution of anthropogenic carbon dioxide (CO2) emissions in seawater has profound consequences for marine ecology and biogeochemistry. The oceans have absorbed one-third of CO2 emissions over the past two centuries, altering ocean chemistry, reducing seawater pH, and affecting marine animals and phytoplankton in multiple ways. Microbially mediated ocean biogeochemical processes will be pivotal in determining how the earth system responds to global environmental change; however, how they may be altered by ocean acidification is largely unknown. We show here that microbial nitrification rates decreased in every instance when pH was experimentally reduced (by 0.05–0.14) at multiple locations in the Atlantic and Pacific Oceans. Nitrification is a central process in the nitrogen cycle that produces both the greenhouse gas nitrous oxide and oxidized forms of nitrogen used by phytoplankton and other microorganisms in the sea; at the Bermuda Atlantic Time Series and Hawaii Ocean Time-series sites, experimental acidification decreased ammonia oxidation rates by 38% and 36%. Ammonia oxidation rates were also strongly and inversely correlated with pH along a gradient produced in the oligotrophic Sargasso Sea (r2 = 0.87, P < 0.05). Across all experiments, rates declined by 8–38% in low pH treatments, and the greatest absolute decrease occurred where rates were highest off the California coast. Collectively our results suggest that ocean acidification could reduce nitrification rates by 3–44% within the next few decades, affecting oceanic nitrous oxide production, reducing supplies of oxidized nitrogen in the upper layers of the ocean, and fundamentally altering nitrogen cycling in the sea. |
format |
Text |
author |
Beman, J. Michael Chow, Cheryl-Emiliane King, Andrew L. Feng, Yuanyuan Fuhrman, Jed A. Andersson, Andreas Bates, Nicholas R. Popp, Brian N. Hutchins, David A. |
author_facet |
Beman, J. Michael Chow, Cheryl-Emiliane King, Andrew L. Feng, Yuanyuan Fuhrman, Jed A. Andersson, Andreas Bates, Nicholas R. Popp, Brian N. Hutchins, David A. |
author_sort |
Beman, J. Michael |
title |
Global declines in oceanic nitrification rates as a consequence of ocean acidification |
title_short |
Global declines in oceanic nitrification rates as a consequence of ocean acidification |
title_full |
Global declines in oceanic nitrification rates as a consequence of ocean acidification |
title_fullStr |
Global declines in oceanic nitrification rates as a consequence of ocean acidification |
title_full_unstemmed |
Global declines in oceanic nitrification rates as a consequence of ocean acidification |
title_sort |
global declines in oceanic nitrification rates as a consequence of ocean acidification |
publisher |
National Academy of Sciences |
publishDate |
2011 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3017153 http://www.ncbi.nlm.nih.gov/pubmed/21173255 https://doi.org/10.1073/pnas.1011053108 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3017153 http://www.ncbi.nlm.nih.gov/pubmed/21173255 http://dx.doi.org/10.1073/pnas.1011053108 |
op_doi |
https://doi.org/10.1073/pnas.1011053108 |
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Proceedings of the National Academy of Sciences |
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108 |
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1 |
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208 |
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213 |
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1766156256204029952 |