辽东湾大型底栖动物群落结构及生物多样性研究

doi:10.16378/j.cnki.1003-1111.25043

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Abstract Macrobenthos constitute a crucial component of marine ecosystems and act as ecological indicators reflecting changes in the marine benthic environment. To investigate the community structure and biodiversity characteristics of macrobenthos in Liaodong Bay, in this study multiple bottom trawl survey datasets from Liaodong Bay were analyzed. By employing taxonomic diversity indices, species diversity indices, non-metric multidimensional scaling, one-way analysis of similarity, and similarity percentage analysis, we investigated the composition of dominant species, biodiversity, seasonal variations in community structure, and the taxonomic diversity level of macrobenthos in this sea area. The results are summarized as follows: a total of 141 macrobenthic species were recorded. A total of 68 macrobenthic species were collcoted in the seasonal survey, among which Mollusca constituted the most diverse group (24 species). The dominant species differed between spring and autumn, with Crustacea being predominant in autumn. The average similarity of macrobenthic communities was 24.43% in spring and 24.45% in autumn. Significant differences were observed between spring and autumn communities (P<0.001), and the average variation of macrobenthic communities between two seasons was 87.84%. The theoretical mean values of the Average Taxonomic Distinctness Index (Δ⁺) and Variation in Taxonomic Distinctness Index(Λ⁺) for Liaodong Bay trawl macrobenthos were 92.30 and 257.0, respectively. Both Shannon-Wiener and Simpson diversity indices were significantly lower in spring than those in autumn (P<0.05). Abundance-biomass curves indicated disturbed macrobenthic communities, with more pronounced disturbance in autumn. Furthermore, different sampling methods demonstrate distinct selectivity toward biological species. We recommend integrating multiple sampling approaches with long-term monitoring to provide a robust scientific basis for the sustainable management and conservation of macrobenthic communities.

Key words： Liaodong Bay macrobenthos community structure biodiversity

Received: 24 February 2025

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S932.2

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	Articles by authors
	LI Jiandu
	KONG Yefu
	YAN Long
	GUO Dong

Cite this article:

LI Jiandu,KONG Yefu,YAN Long, et al. Community Structure and Biodiversity of Macrobenthos in Liaodong Bay[J]. Fisheries Science, 2025, 44(6): 919-928.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.25043 OR https://www.shchkx.com/EN/Y2025/V44/I6/919

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