多甲藻和微囊藻竞争利用不同形态磷增殖研究

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Abstract To investigate the competitive utilization of different phosphorus species by different algal species and their influences on phytoplankton community structure, mono-culture experiments were performed firstly with Peridinium umbonatum var.inaequale and Microcystis aeruginosa in the PM4A plate at different phosphorus resources. Secondly, one species were added to natural seawater samples, separately, and performed mixed-culture experiments under 5'-AMP and K₂HPO₄ conditions. It was found that both species can make use of amino acids and nucleotides efficiently, and P. umbonatum var. inaequale and M. aeruginosa can, respectively, utilize 35 and 25 kinds of dissolved organic phosphates (DOP). These results suggest that dinoflagellate and cyanobacteria can take up DOP resources selectively. When P. umbonatum var.inaequale was used to regulate phytoplankton community composition, and chlorophyta:dinoflagellate:diatom:cyanobacteria were set to 38%:26%:20%:7%, dinoflagellate possessed competitive advantages regardless of the phosphorus resources and their percentages were 37.11%~50.19%. Once M. aeruginosa was added to natural seawater samples, and chlorophyta:dinoflagellate:diatom:cyanobacteria were set to 38%:29%:20%:4%, cyanobacteria had competitive advantages and their percentages were 52.25%~53.44%. Our data indicate that at the same temperature and light intensity, both phosphorus species and the proportion of initial phytoplankton biomass play important roles on regulating succession of the phytoplankton community.

Key words： Peridinium umbonatum var. inaequale Microcystis aeruginosa adenosine-5'-monophosphate community structure

Received: 26 April 2019

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	Articles by authors
	XIAO Yu-mei
	CHEN Yang-feng
	SU Yu-ping
	ZHANG Li-xiang
	SHE Chen-xing
	LIAO Fu-ping

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XIAO Yu-mei,CHEN Yang-feng,SU Yu-ping等. Proliferation of different forms of phosphorus in the competition of Peridinium umbonatum var.inaequale and Microcystis aeruginosa[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4796-4803.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I11/4796

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