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Paleoproductivity and its environmental constraints in the Scotia Sea, Antarctica since 34 ka BP
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Chunli Yang1, 2, Zhihua Chen1, 2, *, Wenshen Xiao3, Xiangqin Wang1, Mengshan Ju1, Yingchun Cui1, Yuanhui Huang1, Zheng Tang1
Haiyang Xuebao | 2021, 43(3) : 116 - 125
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Haiyang Xuebao | 2021, 43(3): 116-125
• Article •
Paleoproductivity and its environmental constraints in the Scotia Sea, Antarctica since 34 ka BP
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Chunli Yang1, 2, Zhihua Chen1, 2, *, Wenshen Xiao3, Xiangqin Wang1, Mengshan Ju1, Yingchun Cui1, Yuanhui Huang1, Zheng Tang1
Affiliations
  • 1Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanology, Ministry of Natural Resources, Qingdao 266061, China
  • 2Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, China
  • 3State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
Published: 2021-03-25 doi: 10.12284/hyxb2021051
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Paleoproductivity and environmental evolution since 34 ka BP in the southeastern Scotia Sea, Antarctica were reconstructed by the chronological analyses of biogenic opal (BSiO2), organic nitrogen (Norg), TFe2O3 and organic nitrogen isotopes (δ15Norg) in Core DC-11. Changes in BSiO2 and Norg contents are basically consistent with the Antarctic temperature, being higher in warm times. δ15Norg is coincident with the Antarctic sea ice, being greater and reflecting enhanced nitrate utilization in surface water during cold periods. From Last Glacial, Last Deglaciation to Holocene, paleoproductivity and environment changed significantly, and the millennial variability such as the Antarctic Cold Reversal (ACR) is prominent in the study area. Sea ice plays an important role in correlations between the climate, nutrients and paleoproductivity. The increase of sea ice during the glacial or cold periods caused stronger stratification of surface waters, weaker upwelling of deep waters and their dissolved nutrients to the surface ocean, and then resulted in enhanced nitrate utilization and lower paleoproductivity in surface water. Iron supply in the study area is sufficient in present-day and Holocene while it is excessive during Last Glacial and Last Deglaciation due to more developed dust, which is obviously different from that in the Subantarctic Zone.

Antarctica  /  the Scotia Sea  /  paleoproductivity  /  nutrients  /  sea ice  /  stratification of surface waters
Chunli Yang, Zhihua Chen, Wenshen Xiao, Xiangqin Wang, Mengshan Ju, Yingchun Cui, Yuanhui Huang, Zheng Tang. Paleoproductivity and its environmental constraints in the Scotia Sea, Antarctica since 34 ka BP[J]. Haiyang Xuebao, 2021 , 43 (3) : 116 -125 . DOI: 10.12284/hyxb2021051
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Article Info
doi: 10.12284/hyxb2021051
  • Receive Date：2020-01-08
  • Online Date：2026-02-26
  • Published：2021-03-25
Article Data
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  • Received：2020-01-08
  • Revised：2020-04-13
Funding
Affiliations
    1Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanology, Ministry of Natural Resources, Qingdao 266061, China
    2Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, China
    3State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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