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The majority of core sediments were characterized by dark-grayish, fine-grained mud with abundant gas-escaped and thinly laminated layers. Intervals of summer and winter seasons were represented by periodic peaks of geochemical profiles of parameters such as grain size and relative carbon mass ratios to various nutrients such as nitrogen, sulfur, and phosphorus. In bacteria, <jats:italic>Proteobacteria<\/jats:italic> (66.6%) was the most prevalent phylum, followed by <jats:italic>Chloroflexi<\/jats:italic> (8.9%), <jats:italic>Bacteroidetes<\/jats:italic> (5.1%), and <jats:italic>Spirochaetes<\/jats:italic> (2.6%). Archaea were also abundant, representing approximately half of the total prokaryotes in the sediments. Notably, three <jats:italic>Bacteria (Sulfuricurvum, Sideroxydans<\/jats:italic>, and <jats:italic>Gallionella<\/jats:italic>) and one <jats:italic>Archaea (Thermoplasmata<\/jats:italic>) accounted for 43.4% and 38.4% of the total bacteria and archaea, respectively, implying that iron and sulfur oxidizing microorganisms dominate in this eutrophic freshwater sediment. These results indicate that 1) eutrophic freshwater lakes in monsoon climates undergo a stratified sedimentary process with seasonal and annual variations in geochemical and microbial profiles, and 2) the microbial oxidative metabolism of iron and sulfur is notably active in sediments from a eutrophic lake.<\/jats:p>","DOI":"10.1038\/srep43814","type":"journal-article","created":{"date-parts":[[2017,3,7]],"date-time":"2017-03-07T10:57:28Z","timestamp":1488884248000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":27,"title":["Abundant iron and sulfur oxidizers in the stratified sediment of a eutrophic freshwater reservoir with annual cyanobacterial blooms"],"prefix":"10.1038","volume":"7","author":[{"given":"Long","family":"Jin","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chang Soo","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chi-Yong","family":"Ahn","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyung-Gwan","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sanghyup","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hyeon Ho","family":"Shin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dhongil","family":"Lim","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hee-Mock","family":"Oh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2017,3,7]]},"reference":[{"key":"BFsrep43814_CR1","doi-asserted-by":"crossref","first-page":"3250","DOI":"10.1890\/0012-9658(2000)081[3250:AOCAPB]2.0.CO;2","volume":"81","author":"M Jansson","year":"2000","unstructured":"Jansson, M., Bergstr\u00f6m, A. 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