Adaptability as the key to success for the ubiquitous marine nitrite oxidizer Nitrococcus.
Adaptability as the key to success for the ubiquitous marine nitrite oxidizer Nitrococcus.
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DOI:
10.1126/sciadv.1700807
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发表时间:
2017-11
期刊:
影响因子:
13.6
通讯作者:
Lam P
中科院分区:
文献类型:
--
作者:
Füssel J;Lücker S;Yilmaz P;Nowka B;van Kessel MAHJ;Bourceau P;Hach PF;Littmann S;Berg J;Spieck E;Daims H;Kuypers MMM;Lam P
A globally distributed yet previously overlooked marine nitrite oxidizer can reduce nitrate, produce N2O, and oxidize sulfide. Nitrite-oxidizing bacteria (NOB) have conventionally been regarded as a highly specialized functional group responsible for the production of nitrate in the environment. However, recent culture-based studies suggest that they have the capacity to lead alternative lifestyles, but direct environmental evidence for the contribution of marine nitrite oxidizers to other processes has been lacking to date. We report on the alternative biogeochemical functions, worldwide distribution, and sometimes high abundance of the marine NOB Nitrococcus. These largely overlooked bacteria are capable of not only oxidizing nitrite but also reducing nitrate and producing nitrous oxide, an ozone-depleting agent and greenhouse gas. Furthermore, Nitrococcus can aerobically oxidize sulfide, thereby also engaging in the sulfur cycle. In the currently fast-changing global oceans, these findings highlight the potential functional switches these ubiquitous bacteria can perform in various biogeochemical cycles, each with distinct or even contrasting consequences.
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