Figshare最新文献

筛选

英文中文

Anaerobic Ammonium Oxidation Linked to Microbial Reductionnof Natural Organic Matter in Marine Sediments 海洋沉积物中微生物还原非天然有机物的厌氧氨氧化

Figshare Pub Date : 2018-08-16 DOI: 10.1021/acs.estlett.8b00330.s001

E. Emilia Rios-Del Toro (5638913), Edgardo I. Valenzuela (5638916), J. Ernesto Ramírez (5638919), Nguyen E. López-Lozano (5638922), Francisco J. Cervantes (1839250)

{"title":"Anaerobic Ammonium Oxidation Linked to Microbial Reductionnof Natural Organic Matter in Marine Sediments","authors":"E. Emilia Rios-Del Toro (5638913), Edgardo I. Valenzuela (5638916), J. Ernesto Ramírez (5638919), Nguyen E. López-Lozano (5638922), Francisco J. Cervantes (1839250)","doi":"10.1021/acs.estlett.8b00330.s001","DOIUrl":"https://doi.org/10.1021/acs.estlett.8b00330.s001","url":null,"abstract":"Identificationnof microbial processes driving the loss of nitrogennfrom the oceans is of paramount relevance as these processes affectnprimary productivity in these ecosystems, which ultimately affectsnglobal biogeochemical cycles. Denitrification and anammox (anaerobicnammonium oxidation coupled to nitrite reduction) are the only identifiednprocesses so far that lead to nitrogen loss in marine environments.nHere we provide stoichiometric and spectroscopic evidence, as wellnas tracer analysis with [15N]ammonium, revealing that anaerobicnammonium oxidation linked to the microbial reduction of natural organicnmatter (NOM) fuels nitrogen loss in marine sediments from the easternntropical North Pacific coast. Tracer analysis revealed that the NOM-dependentnanammox process was responsible for producing ∼1.5 μgnof 15N2 (g of sediment)−1 day–1 after incubation for 27 days in sediment incubationsnamended with Pahokee peat, while intrinsic NOM present in the sedimentnpromoted the production of ∼0.4 μg of 15N2 (g of sediment)−1 day–1. Taxonomic characterization, based on 16S rRNA gene sequencing,nof the biota present in marine sediments performing the NOM-dependentnanammox process revealed several microbial members are potentiallyninvolved. The most predominant bacterial phylotypes detected werenassociated with Phycisphaeraceae, Actinomarinales, Acidiferrobacteraceae,nand Rhodobacteraceae, while Nitrosopumilaceae was the only archaealnfamily whose level clearly increased during the course of NOM-dependentnanammox. This is a novel pathway interconnecting the oceanic biogeochemicalncycles of N and C, which may significantly propel nitrogen fluxesnin organic-rich, coastal marine sediments.","PeriodicalId":522582,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147899695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1