黄渤海不同水层中浮游植物对灰霾添加的响应

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Abstract The effects of haze on phytoplankton in different water layers were investigated through ship-based containment culture experiments in the South Yellow Sea and Bohai Sea. Surface seawater (Sur) and Deep Chlorophyll Maximum seawater (DCM) were collected and mixed 1:1 in mixed layer seawater (Mix). Ship-based isolation culture experiments were conducted with haze added to seawater in three water layers. The results showed that haze addition could alleviate N limitation in nutrient-poor seawater and promote the growth of phytoplankton. However, under multi-factor limiting conditions, the responses of phytoplankton to haze addition varied significantly. In the southern part of the South Yellow Sea, the response degree of phytoplankton to haze addition was DCM layer > Mix layer ≈ Sur layer due to the increase of N nutrients with depth. In the northern part of the South Yellow Sea, phytoplankton was affected by Si restriction, especially in the surface layer, and the response degree of phytoplankton to haze addition was DCM layer > Mix layer > Sur layer. In the southern Bohai Sea, phytoplankton was affected by light restriction, especially in the deep layer, and the response degree of phytoplankton to haze addition was Sur layer ≈ Mix layer > deep layer. In addition to promoting the growth of phytoplankton, haze addition can also shift the size structure of phytoplankton from small particle size to large particle size. Specifically, the proportion of microsized phytoplankton decreases, while the proportion of nanosized phytoplankton increases because the addition of haze can increase the N/P in seawater. The overall particle size structure of phytoplankton increased, resulting in the decrease of POC/Chl a value in seawater.

Key words： haze particle the Yellow Sea and Bohai sea phytoplankton community structure silicon limitation light limitation

Received: 09 February 2023

PACS:

X173

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	Articles by authors
	ZHANG Yan-song
	WANG Qin
	ZHANG Chao
	JIN Hao-yu
	GAO Hui-wang

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ZHANG Yan-song,WANG Qin,ZHANG Chao等. Response of phytoplankton to haze addition in various water layers in the Yellow Sea and the Bohai Sea[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(9): 4791-4800.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I9/4791

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