Effects of suspended particles on the growth of two dominant phytoplankton species of Bohai Bay,China |
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| Authors: | Chunguang Liu Junli Wang Jianfeng Feng Shitao Peng |
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| Institution: | 1. Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Nankai University, Tianjin 300071, China;2. Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Tianjin 300071, China;3. Tianjin Research Institute of Water Transport Engineering, Tianjin 300456, China |
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| Abstract: | Suspended particles (SP) are increasing dramatically in Bohai Bay, China and may affect the growth and composition of phytoplankton assembly. To determine the effects of SP on the growth of two dominant phytoplankton species, Phaeodactylum tricornutum Bohlin and Gymnodinium sp., we cultured and tested their growth characteristics under SP concentrations ranging from 0 g L−1 to 0.8 g L−1. Our results show that the increase in the SP concentrations results in significant decrease in the maximum cell densities and the maximum specific growth rates of these two species. The half maximal inhibitory concentration (IC50) of SP to P. tricornutum and Gymnodinium sp. were 1.07 g L−1 and 0.68 g L−1 respectively, indicating the inhibitory effect of SP on Gymnodinium sp. was greater than on P. tricornutum. These results suggest that SP inhibits the growth of the two algal species and P. tricornutum is more tolerant to SP than Gymnodinium sp. |
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| Keywords: | Suspended particles Marine phytoplankton Algal species Growth inhibitory rate Bohai Bay |
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