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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
Address:College of Life Sciences, Sichuan University, No.29, Wangjiang Road, Chengdu, Sichuan Province, 610064, China
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Your Position :Home->Past Journals Catalog->2022 Vol.41 No.4

Fish Diversity and Spatial Pattern in the Liqiu River, a Tributary of the Middle Yalong River
Author of the article:DENG Jiajun1, WANG Xiaodong1, TONG Lintian1, XU Liangliang1, XIANG Peng1, SUN Guang2, XIAO Nengwen2, SONG Zhaobin1,3*
Author's Workplace:1.Key Laboratory of Bio‑Resources and Eco‑Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China
2.State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
3.Observation and Research Station of Sichuan Province of Fish Resources and Environment in Upper Reaches of the Yangtze River, College of Life Sciences, Sichuan University, Chengdu 610065, China
Key Words:Liqiu River;fish diversity;spatial pattern;habitat;tributary conservation
Abstract:The diversity and community structure of fish assemblages in the Liqiu River, a tributary of middle reaches of the Yalong River, were investigated. The habitat value for conservation of fish species in the mainstream of the middle Yalong River was analyzed as well. A total of 2 557 fish individuals belonging to 13 species, 9 genera, 4 families and 2 orders were collected from 11 sites along the Liqiu River in September 2019, and June and November 2020. Specifically, there were more Triplophysa xiqiensis Schizopygopsis malacanthusSchizothorax wangchiachii, and Schizothorax prenanti in the surveyed areas, whereas the individual numbers of other species were fewer than 10. The abundance/biomass curve showed that fish in the Liqiu River were under harsh ecological conditions. There was a significant negative correlation between fish diversity and altitude according to the Spearman’s rank correlation coefficient. Non‑metric multidimensional scaling analysis suggested that elevation shaped the spatial patterns of fish assemblages. The fish from the mainstream of Yalong River might inhabit the lower reaches of Liqiu River (from the estuary to Luorang of Pusharong Township), but they could not migrate further up to the middle and upper reaches of Liqiu River due to elevation limitation. This led to a significantly different species composition of fish from that in the middle Liqiu River. In the upper reaches of Liqiu River, Tala and Sewurong tributaries, there were only two species, T. xiqiensis and S. malacanthus. Therefore, the low fish diversity in the Liqiu River, the harsh ecological conditions, and the elevational barrier that constraints on fish distribution may influence the value for protecting fish assemblages in the middle Yalong River after the hydropower was developed, and the mainstream itself should be considered for further habitat conservation.
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