鄱阳湖-长江水道鱼类群落多样性及其与水位波动的关系

IF 2.1 3区 环境科学与生态学 Q2 ECOLOGY
Ecohydrology Pub Date : 2025-08-11 DOI:10.1002/eco.70096
Wang Luyao, Hua Qi, Zhang Yuhai, Yin Hong, Hu Maolin, Wang Sheng
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引用次数: 0

摘要

鄱阳湖与长江只有一条重要水路相连,水位波动明显。为了了解水位变化对该水道鱼类群落多样性的影响,我们计算了物种多样性、分类多样性和功能多样性三个维度的12个指数。同时,采用冗余分析(RDA)和广义加性模型(GAM)评价了鱼类群落多样性对水位波动的响应。共收集鱼类63种,隶属于7目13科39属,鲤形目为优势目。根据RDA,由水位波动驱动的栖息地变化是鱼类群落多样性变化的主要因素。GAM模型进一步揭示,水位变化直接影响了鱼类群落的多样性,导致分类独特性指数下降,但物种多样性、分类多样性和功能多样性增加。特别是物种数量、分类独特性指数和功能丰富度指数的变化与水位呈极显著相关(p < 0.001)。因此,高水位是维持鄱阳湖-长江水道鱼类群落多样性的首要和关键因素。研究结果可为该水体渔业资源的养护与管理提供科学依据,为加强湖泊生态系统的保护与管理提供重要指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fish Community Diversity and Its Relationships With Water-Level Fluctuations in the Waterway Connecting Poyang Lake and the Yangtze River

Poyang Lake, with an obviously fluctuating water level, is connected to the Yangtze River by only one important waterway. To understand how water level fluctuation drives fish community diversity in this waterway, 12 indices across three dimensions (species diversity, taxonomic diversity and functional diversity) were calculated. Meanwhile, redundancy analysis (RDA) and generalized additive models (GAM) were used to evaluate the response of fish community diversity to water level fluctuations. We collected 63 fish species belonging to 7 orders, 13 families and 39 genera, with Cypriniformes being the dominant order. According to RDA, habitat changes driven by water level fluctuations were the primary factors underlying the shifts in fish community diversity. The GAM model further revealed that water level changes directly impacted the diversity of the fish community, leading to a decrease in the taxonomic distinctness index but an increase in species diversity, taxonomic diversity and functional diversity. Particularly, the number of species, the variation in the taxonomic distinctness index and the functional richness index exhibited highly significant correlations with water levels (p < 0.001). Therefore, high water levels were the primary and crucial factor in maintaining the fish community diversity in the waterway connecting Poyang Lake and the Yangtze River. These results could provide a scientific basis for the conservation and management of the fishery resources in the water body and provide important guidance to strengthen the protection and management of the lake ecosystem.

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来源期刊
Ecohydrology
Ecohydrology 环境科学-生态学
CiteScore
5.10
自引率
7.70%
发文量
116
审稿时长
24 months
期刊介绍: Ecohydrology is an international journal publishing original scientific and review papers that aim to improve understanding of processes at the interface between ecology and hydrology and associated applications related to environmental management. Ecohydrology seeks to increase interdisciplinary insights by placing particular emphasis on interactions and associated feedbacks in both space and time between ecological systems and the hydrological cycle. Research contributions are solicited from disciplines focusing on the physical, ecological, biological, biogeochemical, geomorphological, drainage basin, mathematical and methodological aspects of ecohydrology. Research in both terrestrial and aquatic systems is of interest provided it explicitly links ecological systems and the hydrologic cycle; research such as aquatic ecological, channel engineering, or ecological or hydrological modelling is less appropriate for the journal unless it specifically addresses the criteria above. Manuscripts describing individual case studies are of interest in cases where broader insights are discussed beyond site- and species-specific results.
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