Harmful algal blooms (HABs) in Daya Bay, China: An in situ study of primary production and environmental impacts |
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| Authors: | Xingyu Song Liangmin Huang Jianlin Zhang Honghui Huang Tao Li Qiang Su |
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| Institution: | aLMB and LED, South China Sea Institute of Oceanology, CAS, 164 West Xin’gang Road, Guangzhou 510301, China;bMarine Biology Research Station at Daya Bay, CAS, Shenzhen, China;cKey Laboratory of Fisheries Ecology Environment, Ministry of Agriculture, Guangzhou, China |
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| Abstract: | A month-long investigation of phytoplankton biomass and primary production (PP) was carried out during a harmful algal bloom (HAB) in Daya Bay, China, in 2003. During the bloom, the phytoplankton community was dominated by Scrippsiella trochoidea and Chattonella marina. The phytoplankton biomass (Chl a) and PP reached peak levels of 519.21 mg m−3 and 734.0 mgC m−3 h−1, respectively. Micro-phytoplankton was the key contributor to Chl a and PP in a cage-culture area and in the adjacent HAB-affected waters, with percentages of up to 82.91% and 84.94%, respectively. The HAB had complicated relationships with hydrological and meteorological factors in Daya Bay. However, the water around the cage-culture area always showed statistically greater phytoplankton biomass and nutrient loadings than in adjacent waters, suggesting that this was the “trigger area” of the bloom. The spatial and temporal distribution of diverse HABs in Daya Bay, their ecological characteristics, and their environmental impacts are also discussed in this paper. |
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| Keywords: | HAB Primary production Chlorophyll a Phytoplankton Anthropogenic impact Daya Bay |
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