长山列岛邻近海域甲壳类群落种类组成及多样性

doi:10.16378/j.cnki.1003-1111.24027

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Abstract In order to ascertain the species composition and diversity of crustacean community in the adjacent waters of Changshan Islands, the seasonal and spatial changes in crustacean species composition, dominant species, community species diversity and their correlations with environmental factors were analyzed by ecological diversity index and index of relative importance (IRI) and generalized additive model based on the seasonal survey data of fishery resources and marine environment in the adjacent waters of Changshan Islands in autumn in 2016, and winter, spring and summer in 2017. There were 37 species captured, 2 orders, 16 families and 26 genera, with 18.92% of warm water species, 72.97% of warm temperate species and 8.11% of cold temperate species in the total number of crustacean species. The crustacean resources density was shown to be obvious spatial and seasonal changes in the adjacent waters of Changshan Islands, with species composition replacement rates ranging from 36% to 53%, higher replacement rates in autumn-winter (53%) and in winter-spring (48%), and lower replacement rate in spring-summer (37%) and summer-autumn (36%). Mantis shrimp Oratosquilla oratoria was found to be the dominant species in each season, and Crangon affinis and Alpheus japonicas to be the common dominant species in spring and winter. Higher species diversity index (D) of crustacean community was observed in spring and summer (2.22), and lower in winter (1.66), and higher Shannon-Wiener diversity index (H') and evenness index (J') in autumn (1.48) and low in summer (0.26). There were significant spatial changes in species diversity index in crustaceans, with the peak species richness index (D) in the northwest of the surveyed area in spring, with low value in the southeast sea and near the coast, two peaks in the central sea area in summer, and high value in the southwest and low value in the northeast in autumn. There were two peaks of Shannon-Wiener's Diversity Index (H') in the northwest and southeast seas in autumn, and a peak in the northeast in winter, with a lower value near the coast. The peak evenness index (J') was observed in the southeast coast in autumn. Generalized additive model (GAM) analysis revealed that water depth, bottom temperature and bottom salinity were the environmental factors affecting the spatial distribution of crustacean diversity in this sea area. The findings indicate that the species composition and diversity of crustaceans have obvious spatial and temporal heterogeneity in the adjacent waters of Changshan Islands.

Key words： Changshan Islands crustaceans species composition species diversity spatial heterogeneity

Received: 14 February 2024

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	Articles by authors
	CAO Jingxuan
	ZOU Jianyu
	XU Binduo
	SUN Lidong
	JI Yupeng

Cite this article:

CAO Jingxuan,ZOU Jianyu,XU Binduo, et al. Species Composition and Diversity of Crustacean Community in the Waters Adjacent to Changshan Islands[J]. Fisheries Science, 2025, 44(2): 181-190.

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https://www.shchkx.com/EN/10.16378/j.cnki.1003-1111.24027 OR https://www.shchkx.com/EN/Y2025/V44/I2/181

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