Studies about Heishui River as an alternative habitat for aquatic biodiversity protection basedon macroinvertebrate community similarity
Lü Ya-ning1,2, XIE Ying1, WANG Shao-ming3, QU Xiao-dong1, ZHANG Min1
1. Department of Water Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China;
2. Geography and Tourism, Qufu Normal University, Rizhao 276800, China;
3. Yinluan Project Management Bureau, Haihe River Water Conservancy Commission, Ministry of Water Resources, Tangshan 064309, China
As an importantregion of the Yangtze River Protection Strategy, downstream of Jinsha River plays a vital role as the reserve of fish germplasm resources. Therefore, protection of local aquatic ecosystem has been paid more attentions, particularly in the context of the operation of cascade hydropower stations. In this study, the similarity of macroinvertebrate community in three main tributaries of Jinsha River (i.e., Heishui River, Xixi River and Chishui River) and their relationships with the environmental factors were analyzed. The aim of this study was to explore the possibility of Heishui River as an alternative habitat of the Jinsha River. The results showed that Ephemeroptera, Trichoptera and Diptera were the dominant taxa, while Ephemeroptera was the most abundant taxa in all three rivers. The density, biomass, and diversity indices of macroinvertebrate community in Heishui River and Chishui River were all higher than those in Xixi River. A higher similarity of macroinvertebrate community was found between Heishui River and the upper reach of Chishui River, which dominated by the sensitive taxa of Baetidae. In contrast, its similarity with Xixi River, which is close to Heishui River, was relatively lower. Based on the canonical correspondence analysis, elevation and total nitrogen (TN) were identified as the most significant factors (P < 0.05)influencing the macroinvertebrate community structure, which represented as the regional and local habitat characteristics. Although the upstream of Chishui River was threatened by nitrogen enrichment, it still demonstrated a higher similarity with Heishui River than the rest region. The possible reason is that Chishui and Heishui rivers have similar physical habitats at the head stream reaches. Our findings highlighted the important roles of micro-habitats in structuring the macroinvertebrate community even at a relatively large spatial scale. Considering the higher similarities in terms of community structure, biomass as well as diversity pattern between the Heishui River and the Chishui River, they could be a potential alternative habitat for the ecological function protection in this area.
吕雅宁, 解莹, 王少明, 渠晓东, 张敏. 基于底栖动物群落相似性的黑水河替代生境的研究[J]. 中国环境科学, 2020, 40(6): 2647-2657.
Lü Ya-ning, XIE Ying, WANG Shao-ming, QU Xiao-dong, ZHANG Min. Studies about Heishui River as an alternative habitat for aquatic biodiversity protection basedon macroinvertebrate community similarity. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(6): 2647-2657.
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