Abundant iron and sulfur oxidizers in the stratified sediment of a eutrophic freshwater reservoir with annual cyanobacterial blooms SCIE SCOPUS

Cited 14 time in WEB OF SCIENCE Cited 16 time in Scopus
Title
Abundant iron and sulfur oxidizers in the stratified sediment of a eutrophic freshwater reservoir with annual cyanobacterial blooms
Author(s)
Jin, Long; Lee, Chang Soo; Ahn, Chi-Yong; Lee, Hyung-Gwan; Lee, Sanghyup; Shin, Hyeon Ho; Lim, Dhongil; Oh, Hee-Mock
KIOST Author(s)
Shin, Hyeon Ho(신현호)Lim, Dhong Il(임동일)
Publication Year
2017-03-07
Abstract
The microbial community in eutrophic freshwater sediment was investigated from a 67-cm-deep sediment core collected from the Daechung Reservoir in South Korea, where cyanobacterial blooms have occurred annually for the past 30 years. 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, Proteobacteria (66.6%) was the most prevalent phylum, followed by Chloroflexi (8.9%), Bacteroidetes (5.1%), and Spirochaetes (2.6%). Archaea were also abundant, representing approximately half of the total prokaryotes in the sediments. Notably, three Bacteria (Sulfuricurvum, Sideroxydans, and Gallionella) and one Archaea (Thermoplasmata) 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.
ISSN
2045-2322
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1267
DOI
10.1038/srep43814
Bibliographic Citation
SCIENTIFIC REPORTS, v.7, 2017
Publisher
NATURE PUBLISHING GROUP
Subject
ORGANIC-MATTER; LAKE-SEDIMENTS; NEUTRAL PH; BACTERIA; PHOSPHORUS; MICROORGANISMS; PRIMERS; ECOLOGY; CARBON; ENVIRONMENTS
Type
Article
Language
English
Document Type
Article
Publisher
NATURE PUBLISHING GROUP
Related Researcher
Research Interests

Marine bioresource,Marine phytoplankton diversity / ecology,Marine micropaleontology,해양생물자원,해양식물플랑크톤 다양성/생태학,해양미고생물학

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