The impacts of water level fluctuations between wet and dry seasons on taxonomic and functional diversity of fish communities in the ecotone floodplain of Lake Caizi

被引：0
|
作者：
Wang C. [1 ]
Zhou L. [1 ]
Dai B. [1 ]
Gu C. [1 ]
Jiang Z. [1 ]
机构：
[1] School of Resources and Environmental Engineering, Anhui University, Hefei
来源：
Hupo Kexue/Journal of Lake Sciences | 2019年 / 31卷 / 05期
关键词：
Ecotone floodplain; Fish; Functional diversity; Functional traits; Taxonomic diversity; Wet and dry seasons;
D O I：
10.18307/2019.0501
中图分类号：
学科分类号：
摘要：
Water level fluctuations between wet and dry seasons, assisting by lateral connectivity, play a fundamental role in underpinning the composition and distribution of fish fauna in floodplain lakes. The ecotone floodplains between the floodplain rivers and lakes are generally considered as the key areas where witness the exchange of fish species and the variations of biodiversity. However, the study of changes in taxonomic and functional diversity of fish communities in the ecotone floodplain in response to water level fluctuations is limited. Here we address this issue by measuring temporal (dry and wet seasons) and spatial (lotic and lentic habitat patches) changes in taxonomic and functional diversity of fish communities in the ecotone floodplain between the Yangtze River and Lake Caizi. A total of 52 species belonging to 37 genera, 12 families and 6 orders were collected in our study. Among them, there were significant differences in species number between wet and dry seasons, with 50 species and 42 species collected respectively. On the other hand, there was no significant difference in the number of species between lentic and lotic habitat patches, with 47 species and 48 species collected respectively. In comparison with wet season, the species richness, weight, abundance and importance value percentage of riverine species decreased by 7.3%, 6.3%, 14.4% and 12.0% in dry season. In comparison with lentic habitat patches, the species richness, weight, abundance and importance value percentage of riverine species increased by 5.3%, 14.6%, 18.0% and 22.3%. The fish fauna differences between seasons (dry and wet) and habitat patches (lentic and lotic) were determined by the abundance of Pseudorasbora parva, Saurogobio dabryi, Hemiculter leucisculus, Cyprinus carpio, Carassius auratus, Coilia brachygnathus, Pseudobrama simony, Culter ilishaeformis, Culter dabryi, Saurogobio gymnocheilus and Acheilognathus gracilis. Important value analysis showed that the dominant species of fish in lentic habitat patches and dry season were similar, and the dominant species of fish in lotic habitat patches and wet season were similar as well. The dominant species in wet season and lotic habitat patches were P. parva, S. dabryi, S. gymnocheilus and C. brachygnathus, while the dominant species in dry season and lentic habitat patches were C. carpio, C. auratus, H. leucisculus and P. simoni. Two-way ANOVA analysis indicated that one taxonomic diversity indices (Richness) and three functional diversity indices (FRic, FDiv and FDis) significantly differed between wet and dry seasons. Taxonomic richness, functional richness, functional divergence and functional dispersion were significantly higher in wet season than in dry season. Meanwhile, the functional richness was significantly higher in lentic than in lotic habitat patches. Functional diversity exhibited higher sensitivity than the traditional taxonomic diversity, since three functional diversity indices showed significant variations between wet and dry seasons. Meanwhile, our study highlight important functional recruitments of fish assemblages triggered by seasonal flood pulses. © 2019 by Journal of Lake Sciences.
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页码：1403 / 1414
页数：11
相关论文
共 62 条
  • [11] Balcombe S.R., Bunn S.E., Arthington A.H., Et al., Fish larvae, growth and biomass relationships in an Australian arid zone river: links between floodplains and waterholes, Freshwater Biology, 52, 12, pp. 2385-2398, (2007)
  • [12] Espinola L.A., Rabuffetti A.P., Abrial E., Et al., Response of fish assemblage structure to changing flood and flow pulses in a large subtropical river, Marine and Freshwater Research, 68, 2, pp. 319-330, (2017)
  • [13] Nunn A.D., Harvey J.P., Cowx I.G., Benefits to 0+ fishes of connecting man-made waterbodies to the lower River Trent, England, River Research and Applications, 23, 4, pp. 361-376, (2007)
  • [14] Arrington D.A., Winemiller K.O., Organization and maintenance of fish diversity in shallow waters of tropical floodplain rivers, Proceedings of the Second International Symposium on the Management of Large Rivers for Fisheries, 2, pp. 25-36, (2004)
  • [15] Pielou E.C., An Introduction to Mathematical Ecology, (1969)
  • [16] Shannon C.E., Weaver W., The Mathematical Theory of Communication, (1949)
  • [17] Sun R.Y., Li B., Zhuge Y., Et al., General Ecology, (1993)
  • [18] Von Euler F., Svensson S., Taxonomic distinctness and species richness as measures of functional structure in bird assemblages, Oecologia, 129, 2, pp. 304-311, (2001)
  • [19] Brosse S., Grenouillet G., Gevrey M., Et al., Small-scale gold mining erodes fish assemblage structure in small neotropical streams, Biodiversity and Conservation, 20, 5, pp. 1013-1026, (2011)
  • [20] Hooper D.U., Vitousek P.M., Effects of plant composition and diversity on nutrient cycling, Ecological Monographs, 68, 1, pp. 121-149, (1998)
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