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Multi-radionuclides for quantifying marine particle dynamic processes in coral reef ecosystem
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Zhu LUO1, Wu-hui LIN2, *, Yi-tong WANG1, Si-yu HUANG1, Ke-fu YU1
China Environmental Science | 2025, 45(3) : 1576 - 1586
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China Environmental Science | 2025, 45(3): 1576-1586
• Environmental Ecology •
Multi-radionuclides for quantifying marine particle dynamic processes in coral reef ecosystem
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Zhu LUO1, Wu-hui LIN2, *, Yi-tong WANG1, Si-yu HUANG1, Ke-fu YU1
Affiliations
  • 1.Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, School of Marine Sciences, Guangxi University, Nanning 530004, China
  • 2.College of Harbor and Coastal Engineering, Jimei University, Xiamen 361021, China
Published: 2025-03-20
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The naturally occurring radionuclides in the sinking particle, surface sediments, and sediment cores near the Weizhou Island in the Beibu Gulf were simultaneously analyzed by high purity germanium γ spectrometer in this study. The sinking particle at the west station of the Weizhou Island was mainly attributed to the strong sediment resuspension that was demonstrated by the combined evidences of 40K, 234Thex, 7Be, and 238U-232Th（228Ra）-40K/10 ternary diagram. Sediment accumulation rates（SAR）of two sediment cores（WZ16and WZ20）at the west stations of the Weizhou Island were calculated to be 1.46×10-3 and 2.25×10-3 cm/d using the constant flux and constant sedimentation rate model of excess 210Pb. These 210Pb derived-sediment accumulation rates were only 0.50% and 0.89% of the sediment sinking rates（295×10-3 and 252×10-3 cm/d）derived from sediment trap, quantitatively indicating strong sediment resuspension before the ultimate burial in sediment. Additionally, a high recruitment of coral larvae was observed at the west station with strong sediment resuspension. It was speculated that the strong biogenic sediment resuspension would provide sufficient heterotrophic energy for coral polyps.

coral reefs  /  radionuclide  /  source identification  /  sedimentation accumulation rate  /  resuspension
Zhu LUO, Wu-hui LIN, Yi-tong WANG, Si-yu HUANG, Ke-fu YU. Multi-radionuclides for quantifying marine particle dynamic processes in coral reef ecosystem[J]. China Environmental Science, 2025 , 45 (3) : 1576 -1586 .
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  • Receive Date：2024-08-15
  • Online Date：2026-03-18
  • Published：2025-03-20
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  • Received：2024-08-15
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Affiliations
    1.Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, School of Marine Sciences, Guangxi University, Nanning 530004, China
    2.College of Harbor and Coastal Engineering, Jimei University, Xiamen 361021, 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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