Bacterial Activity and Their Physiological Characteristics in the Sediments of O DP Holes 1202A and 1202D, Okinawa Trough, Western Pacific

Jean, Jiin-Shuh; Chiang, Tzen‐Yuh; Wei, Kuo-Yen; Jiang, Wei; Liu, Chia Chuan; Tsai, Yen Ping N.

doi:10.3319/tao.2005.16.1.113(ot)

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…Sedimentary bacterial abundance in the ECMS was in the same range with that reported in the SYS ( Liu et al, 2015 ), and was slightly lower than that in bioturbated coastal sediments from the Catalina Island ( Bertics and Ziebis, 2009 ; Plotieau et al, 2013 ). By contrast, this abundance was higher than that in the Eastern Mediterranean Sea ( Polymenakou et al, 2006 ) and in ODP sites from the Okinawa Trough and Peru margin ( Mauclaire et al, 2004 ; Jean et al, 2005 ). Different environmental features may explain some of this variance in bacterial abundance across different areas.…”

Section: Discussionmentioning

confidence: 68%

Sediment Depth-Dependent Spatial Variations of Bacterial Communities in Mud Deposits of the Eastern China Marginal Seas

et al. 2018

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The mud sediments of the eastern China marginal seas (ECMS) are deposited under different hydrodynamic conditions with different organic matter sources. These events have been demonstrated to exert significant influences on microbial communities and biogeochemical processes in surface sediments. However, the extent to which such effects occur in subsurface microbial communities remains unclear. In this study, both horizontal and vertical (five sites, each for eight layers) distributions of bacterial abundance and community composition in mud deposits of the South Yellow Sea (SYS) and East China Sea (ECS) were investigated by quantitative PCR and Illumina sequencing of the 16S rRNA gene. Both bacterial abundance and diversity were higher in the ECS than in the SYS, and tended to be higher in up than in deep layers. Proteobacteria (JTB255 marine benthic group), Acidobacteria and Bacteroidetes were dominant in the upper layers, whereas Lactococcus, Pseudomonas, and Dehalococcoidia were enriched in the deep layers. The bacterial communities in surface and subsurface sediments showed different inter-taxa relationships, indicating contrasting co-occurrence patterns. The bacterial communities in the upper layer samples clustered in accordance with mud zones, whereas those in the deep layer samples of all sites tended to cluster together. TOC δ13C and TON δ15N significantly affected the bacterial community composition, suggesting that the abundance and composition of organic matter played critical roles in shaping of sedimentary bacterial communities. This study provides novel insights into the distribution of subsurface bacterial communities in mud deposits of the ECMS, and provides clues for understanding the biogeochemical cycles in this area.

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Section: Discussionmentioning

confidence: 68%

Sediment Depth-Dependent Spatial Variations of Bacterial Communities in Mud Deposits of the Eastern China Marginal Seas

et al. 2018

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“…Psychrophilic enzymes produced by deep-sea cold-adapted bacteria display a high catalytic efficiency, not only important for in situ biogeochemical processes, but also for their potentials in biotechnology and industry applications (Gerday et al 2000;Demirjian 2001; van den Burg 2003). However, very little effort has been made to understand the microbial ecophysiology in the unique Southern Okinawa Trough sedimentary environment (Jean et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Extracellular hydrolytic enzyme screening of culturable heterotrophic bacteria from deep-sea sediments of the Southern Okinawa Trough

Dang

Zhu

Wang

et al. 2008

World J Microbiol Biotechnol

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The Southern Okinawa Trough is an area of focused sedimentation due to particulate matter export from the shelf of the East China Sea and the island of Taiwan. In order to understand the geomicrobiological characteristics of this unique sedimentary environment, bacterial cultivations were carried out for an 8.61 m CASQ core sediment sample. A total of 98 heterotrophic bacterial isolates were characterized based on 16S rRNA gene phylogenetic analysis. These isolates can be grouped into four bacterial divisions, including 13 genera and more than 20 species. Bacteria of the c-Proteobacteria lineage, especially those from the Halomonas (27 isolates) and Psychrobacter (20 isolates) groups, dominate in the culturable bacteria assemblage. They also have the broadest distribution along the depth of the sediment. More than 72.4% of the isolates showed extracellular hydrolytic enzyme activities, such as amylases, proteases, lipases and Dnases, and nearly 59.2% were cold-adapted exoenzymeproducers. Several Halomonas strains show almost all the tested hydrolases activities. The wide distribution of exoenzyme activities in the isolates may indicate their important ecological role of element biogeochemical cycling in the studied deep-sea sedimentary environment.

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Bacterial Activity and Their Physiological Characteristics in the Sediments of O DP Holes 1202A and 1202D, Okinawa Trough, Western Pacific

Abstract: ABSTRACT

Cited by 3 publications

References 28 publications

Sediment Depth-Dependent Spatial Variations of Bacterial Communities in Mud Deposits of the Eastern China Marginal Seas

Sediment Depth-Dependent Spatial Variations of Bacterial Communities in Mud Deposits of the Eastern China Marginal Seas

Extracellular hydrolytic enzyme screening of culturable heterotrophic bacteria from deep-sea sediments of the Southern Okinawa Trough

Preface to the Special Section on Okinawa Trough: Sedimentary Processes and Paleoenvironment

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