Temporal and Spatial Distribution of Particulate Organic Carbon and Microbial Community Respiration of Atacama Trench Surface Water, Chile 阿塔卡马海沟表层水颗粒有机碳与微生物群落呼吸作用的时空变化研究

Zhao，Xin1; Chen，Hong Wei1; Li，Wen Peng1; Li，Xin Xin1,2,3

2021-05-01

10.11693/hyhz20200600163

海洋与湖沼   影响因子和分区

0029-814X

Trench system is an important part of the global ocean. Studying the biogeochemical cycle in this extreme environment will help us understand the material recycling in the ocean. Previous studies have suggested that surface net primary production (NPP) contributed to the properties of organic carbon buried in trench sediments. However, the microbial community respiration (MCR) and the degradation of deposited particulate organic carbon (POC) through the extremely distant water column is unclear yet. To understand the temporal and spatial variations of MCR, POC, and their interactions, POC content, C/N, δC and δN of POC, along with the size fractionated MCR (0.2-0.8 μm, 0.8-3.0 μm, and > 3.0 μm) of surface water (5 m) samples during cruise SO261, 2018 in the Atacama Trench, Chile, were analyzed. The results indicate that the 0.8-3.0 μm size fraction dominated the total MCR rates and potentially organic carbon degradation in this area. In addition, the MCR presented an M-shaped curve showing significantly greater numbers at night than daytime, which was consistent with the variation trends of C/N, δC, δN, suggesting that the MCR was mainly controlled by temperature over a day, and affected the elemental characteristics of POC. Spatially, the MCR in the trench stations were significantly greater than those in the non-trench stations and affected by NPP, with more complexed variation patterns. In the end, the respiratory degradation rate of NPP by microorganisms based on MCR was estimated 0.5%-4.6% in surface water of the Atacama Trench.

Atacama trench Particulate organic carbon Respiration Surface water Temporal and spatial distribution

中文

第一

2-s2.0-85106592616

Scopus

1.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Shenzhen Key Laboratory of Marine Archaea Geo-Omics,Southern University of Science and Technology,Shenzhen,518055,China
3.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Guangzhou,511458,China

Zhao，Xin,Chen，Hong Wei,Li，Wen Peng,等. Temporal and Spatial Distribution of Particulate Organic Carbon and Microbial Community Respiration of Atacama Trench Surface Water, Chile 阿塔卡马海沟表层水颗粒有机碳与微生物群落呼吸作用的时空变化研究[J]. 海洋与湖沼,2021,52(3):648-656.

Zhao，Xin,Chen，Hong Wei,Li，Wen Peng,&Li，Xin Xin.(2021).Temporal and Spatial Distribution of Particulate Organic Carbon and Microbial Community Respiration of Atacama Trench Surface Water, Chile 阿塔卡马海沟表层水颗粒有机碳与微生物群落呼吸作用的时空变化研究.海洋与湖沼,52(3),648-656.

Zhao，Xin,et al."Temporal and Spatial Distribution of Particulate Organic Carbon and Microbial Community Respiration of Atacama Trench Surface Water, Chile 阿塔卡马海沟表层水颗粒有机碳与微生物群落呼吸作用的时空变化研究".海洋与湖沼 52.3(2021):648-656.