Abundant iron and sulfur oxidizers in the stratified sediment of aeutrophic freshwater reservoir with annual cyanobacterial blooms

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/474174.do
DOI
10.1038/srep43814
Title
Abundant iron and sulfur oxidizers in the stratified sediment of aeutrophic freshwater reservoir with annual cyanobacterial blooms
Description
Grants from the Advanced Biomass R&D Center, a Global Frontier Program,funded by the Korean Ministry of Science, ICT and Future Planning, KISTInstitutional Program (Project No. 2E24280), the Basic Core TechnologyDevelopment Program for the Oceans and the Polar Regions, NationalResearch Foundation (NRF, 2016MIA5A1027453), a Project (PE99334) fundedby the Korea Institute of Ocean Science & Technology (KIOST), and thePriority Academic Program Development of Jiangsu Higher EducationInstitutions (PAPD) supported this research. The authors dedicate thisarticle to Dr. H.J. La, who was a warm and creative scientist butunfortunately passed away on February 13, 2016. We are grateful toreviewers for their valuable comments on this study.
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.
provenance
Made available in Cube on 2018-09-28T10:39:08Z (GMT). No. of bitstreams: 0
language
English
author
Jin, Long
Lee, Chang Soo
Ahn, Chi-Yong
Lee, Hyung-Gwan
Lee, Sanghyup
Shin, Hyeon Ho
Lim, Dhongil
Oh, Hee-Mock
orcid
Jin, Long/0000-0003-3808-5217
accessioned
2018-09-28T10:39:08Z
available
2018-09-28T10:39:08Z
issued
2017
citation
SCIENTIFIC REPORTS(7)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/474174.do
Funder
해양수산부
Funding Program
한국해양과학기술원연구운영비지원
Project ID
1525007372
Jurisdiction
Rep.of Korea
Project Name
섬진강 하구 관리를 위한 환경변화 연구
rights
openAccess
type
article


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