Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1619844114 |
Cryptic oxygen cycling in anoxic marine zones | |
Garcia-Robledo, Emilio1,7; Padilla, Cory C.2; Aldunate, Montserrat3,4; Stewart, Frank J.2; Ulloa, Osvaldo4; Paulmier, Aurelien5; Gregori, Gerald6; Revsbech, Niels Peter1 | |
2017-08-01 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:31页码:8319-8324 |
文章类型 | Article |
语种 | 英语 |
国家 | Denmark; USA; Chile; France; Spain |
英文摘要 | Oxygen availability drives changes in microbial diversity and biogeochemical cycling between the aerobic surface layer and the anaerobic core in nitrite-rich anoxic marine zones (AMZs), which constitute huge oxygen-depleted regions in the tropical oceans. The current paradigm is that primary production and nitrification within the oxic surface layer fuel anaerobic processes in the anoxic core of AMZs, where 30-50% of global marine nitrogen loss takes place. Here we demonstrate that oxygenic photosynthesis in the secondary chlorophyll maximum (SCM) releases significant amounts of O-2 to the otherwise anoxic environment. The SCM, commonly found within AMZs, was dominated by the picocyanobacteria Prochlorococcus spp. Free O-2 levels in this layer were, however, undetectable by conventional techniques, reflecting a tight coupling between O-2 production and consumption by aerobic processes under apparent anoxic conditions. Transcriptomic analysis of the microbial community in the seemingly anoxic SCM revealed the enhanced expression of genes for aerobic processes, such as nitrite oxidation. The rates of gross O-2 production and carbon fixation in the SCM were found to be similar to those reported for nitrite oxidation, as well as for anaerobic dissimilatory nitrate reduction and sulfate reduction, suggesting a significant effect of local oxygenic photosynthesis on Pacific AMZ biogeochemical cycling. |
英文关键词 | Prochlorococcus oxygen minimum zone secondary chlorophyll maximum metatranscriptomics aerobic metabolism |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406653300061 |
WOS关键词 | EASTERN TROPICAL PACIFIC ; MINIMUM-ZONE ; SOUTH-PACIFIC ; NITROGEN LOSS ; ARABIAN SEA ; PROCHLOROCOCCUS ; BACTERIA ; OCEAN ; PHOTOSYNTHESIS ; SEQUENCES |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204760 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Aarhus Univ, Microbiol Sect, Dept Biosci, DK-8000 Aarhus, Denmark; 2.Georgia Inst Technol, Sch Biol Sci, Atlanta, GA 30332 USA; 3.Univ Concepcion, Dept Oceanog, Grad Program Oceanog, Concepcion 4070386, Chile; 4.Univ Concepcion, Inst Milenio Oceanog, Dept Oceanog, Concepcion 4070386, Chile; 5.Univ Toulouse, Lab Etud Geophys & Oceanog Spatiales, Inst Rech Dev, CNRS,Ctr Natl Etud Spatiales, F-31400 Toulouse, France; 6.Univ Toulon & Var, Aix Marseille Univ, Mediterranean Inst Oceanog, CNRS,Inst Rech & Dev,UM 110, F-13288 Marseille, France; 7.Univ Cadiz, Dept Biol, Ecol Sect, Cadiz 11510, Spain |
推荐引用方式 GB/T 7714 | Garcia-Robledo, Emilio,Padilla, Cory C.,Aldunate, Montserrat,et al. Cryptic oxygen cycling in anoxic marine zones[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(31):8319-8324. |
APA | Garcia-Robledo, Emilio.,Padilla, Cory C..,Aldunate, Montserrat.,Stewart, Frank J..,Ulloa, Osvaldo.,...&Revsbech, Niels Peter.(2017).Cryptic oxygen cycling in anoxic marine zones.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(31),8319-8324. |
MLA | Garcia-Robledo, Emilio,et al."Cryptic oxygen cycling in anoxic marine zones".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.31(2017):8319-8324. |
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