Fine-scale Microbial Communities Associated with Manganese Nodules in Deep-sea Sediment of the Korea Deep Ocean Study Area in the Northeast Equatorial Pacific SCIE SCOPUS KCI

Cited 8 time in WEB OF SCIENCE Cited 8 time in Scopus
Title
Fine-scale Microbial Communities Associated with Manganese Nodules in Deep-sea Sediment of the Korea Deep Ocean Study Area in the Northeast Equatorial Pacific
Author(s)
Cho, Hyeyoun; Kim, Kyeong-Hong; Son, Seung Kyu; Hyun, Jung-Ho
KIOST Author(s)
Kim, Kyeong Hong(김경홍)Son, Seung Kyu(손승규)
Publication Year
2018-06
Abstract
Despite its potential significance for industrial utilization, any activities associated with the mining of manganese (Mn) nodules might have substantial impacts on benthic ecosystems. Because microorganisms respond quickly to changing environmental conditions, a study of microbial communities provides a relevant proxy to assess possible changes in benthic ecosystems associated with mining activities. We investigated fine-scale microbial community composition and diversity inside and on the surface of Mn nodules and in nearby deep-sea sediments in the Korea Deep Ocean Study (KODOS) area located in the Clarion-Clipperton Fracture Zone (CCFZ) of the northeast equatorial Pacific. Although microbial cell density was lower within nodules (3.21 x 10(6) cells g(-1)) than in sediment (2.14 x 10(8) cells g(-1)), nodules provided a unique habitat for microorganisms. Manganese-oxidizing bacteria including Hyphomicrobium and Aurantimonas in Alphaproteobacteria and Marinobacter in Gammaproteobacteria were abundant in nodules, which implied that these bacteria play a significant role in nodule formation. In contrast, Idiomarina in Gammaproteobacteria and Erythrobacter and Sulfitobacter in Alphaproteobacteria were abundant in sediments. Meanwhile, Thaumarchaeota, a phylum that consists of ammonia-oxidizing chemolithoautotrophs, were the predominant archaeal group both in nodules and sediment. Overall, microbial communities in Mn nodules were unique compared to those observed in sediments. Furthermore, the phylogenetic composition of microorganisms in the KODOS area was distinguishable from that in the nodule provinces claimed by China and Germany in the CCFZ and nodule fields in the central South Pacific Gyre, respectively.
ISSN
1738-5261
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/884
DOI
10.1007/s12601-018-0032-0
Bibliographic Citation
OCEAN SCIENCE JOURNAL, v.53, no.2, pp.337 - 353, 2018
Publisher
KOREA OCEAN RESEARCH DEVELOPMENT INST
Subject
POTENTIAL ENVIRONMENTAL-IMPACT; CLIPPERTON FRACTURE-ZONE; FERROMANGANESE NODULES; SURROUNDING SEDIMENTS; POLYMETALLIC NODULES; BACTERIAL DIVERSITY; OXIDIZING BACTERIA; MARINE-SEDIMENTS; SP NOV.; OXIDATION
Keywords
Clarion-Clipperton Fracture Zone (CCFZ); deep-sea sediment; microbial community; microbial diversity; 16S rRNA gene; Mn nodule
Type
Article
Language
English
Document Type
Article
Publisher
KOREA OCEAN RESEARCH DEVELOPMENT INST
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