Sung-Uk An , Ju-Wook Baek , Sung-Han Kim , Hyun-Min Baek , Jae Seong Lee , Kyung-Tae Kim , Kyeong Hong Kim , Kiseong Hyeong , Sang-Bum Chi , Chan Hong Park
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引用次数: 0
Abstract
The potential impact of manganese mining on benthic remineralization in the Pacific Ocean was assessed in this study. We estimated total sediment oxygen uptake rates (TOU) using in situ autonomous benthic chambers at the polymetallic nodule and Co-rich polymetallic crust mining sites of Korea: at the Clarion-Clipperton Fracture Zone (PILOT site) in the eastern Pacific and the open-sea seamounts (OSM) 9-1 and OSM17 in the western Pacific, respectively. The TOU rates in the shallow seamount areas (0.58 ± 0.01–2.22 ± 0.04 mmol O2 m−2 d−1) were significantly higher than in the PILOT station (0.21 ± 0.05 mmol O2 m−2 d−1), indicating that relatively labile organic matter could be deposited according to the regional oceanographic features and water depth. The highest TOU found among the seamount areas was in the wide summit area at OSM9-1, which may be due to environmental conditions such as seasonal wind-driven mixing, upwelling around the seamount slope, and topography, which can increase productivity seasonally. Our findings suggest that organic carbon quality and hydrodynamics can be closely linked to benthic carbon mineralization in the targeted polymetallic mining areas of the Pacific.
期刊介绍:
Deep-Sea Research Part I: Oceanographic Research Papers is devoted to the publication of the results of original scientific research, including theoretical work of evident oceanographic applicability; and the solution of instrumental or methodological problems with evidence of successful use. The journal is distinguished by its interdisciplinary nature and its breadth, covering the geological, physical, chemical and biological aspects of the ocean and its boundaries with the sea floor and the atmosphere. In addition to regular "Research Papers" and "Instruments and Methods" papers, briefer communications may be published as "Notes". Supplemental matter, such as extensive data tables or graphs and multimedia content, may be published as electronic appendices.