Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 645, Issue -, Pages 257-266Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2018.07.067
Keywords
Upwelling; Hydro-biogeochemical processes; Eutrophication; Green tides; Northern Jiangsu coast; Yellow Sea
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Funding
- Scientific and Technological Innovation Project of the Qingdao National Laboratory for Marine Science and Technology [2016ASKJ02]
- Open Fund of Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology [LMEES201808]
- National Key Research and Development Program of China [2016YFC1402101]
- National Natural Science Foundation of China [41606040]
- National Natural Science Foundation - Shandong Joint Fund for Marine Science Research Center [U1406403]
- Basic Scientific Fund of the National Public Research Institutes of China [2016Q08]
- National Project of Comprehensive Investigation and Research of Coastal Seas in China [908-01-ST03]
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The hydro-biogeochemical processes in the world's largest area of green tide occurrence, off the Jiangsu coast in the Yellow Sea, are investigated in the summer, and their implications for Ulva prolifera blooms are discussed. The results show that the offshore transport of coastal water and the inshore upwelling of offshore bottom water both occur off the Jiangsu coast, and the upwelling position is consistent with the 20- to 30-m isobath off the Subei Shoal. The upwelling results in nutrient supplementation off the shoal, where a rapid decrease in the suspended particulate matter content contributes to good light conditions. As a result, a high-value area of phytoplankton is formed within the 20- to 30-m isobath. Eutrophication in the shoal has provided nutrients for the frequent occurrence of Ulva prolifera in recent years, whereas the upwelling area off the shoal has served as a service station or courier station for floating Ulva prolifera and promoted the species' propagation. The propagation of Ulva prolifera in the upwelling area and its blooms within the Subei Shoal can have a spatially synergistic effect, leading to its large-scale development. Our findings reveal the mechanisms that trigger the world's largest green tides from the perspective of physical-biogeochemical interactions. (C) 2018 Elsevier B.V. All rights reserved.
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