Spatial distribution pattern of fish community in the passage from Huaihe River to sea and its adjacent river system
XU Tianzhen, XU Dongpo*, ZHOU Yanfeng, JING Li, GE You, ZHANG Yanjiang, ZHAO Lixiang, LIU Pengfei
1.Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Ministry of Agriculture and Rural Affaris, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
Abstract: The composition of fish community was surveyed in 30 sampling sites in the passage from Huaihe River to sea and its adjacent river system including Main Irrigation Canal in northern Jiangsu Province, Guanhe River, Abandoned Huanghe River, Sheyanghe River, and tributary in August and November 2018 by 3 layer gill nets with different meshes to grasp the important environmental factors affecting the structure of fish community, and to provide scientific basis for the protection and management of fish resources in Jiangsu Province. Statistical analysis was conducted on the catches using non-metric multidimensional scale sequencing (NMDS) and redundancy analysis (RDA) methods. A total of 9 322 samples were collected including 53 species, belonging to 7 orders and 14 families, with the most abundant species, the dominant fish in Cyprinidae, followed by Scorpidae and Goldfish. The analysis of spatial distribution characteristics of fish communities showed that the fishes in the surveyed area were divided into three groups, a group of s23, s25 and s29 sites, a group of s3, s4, s7 and s10 sites, and a group of s13, s14 and s16 sites. There were higher Shannon-Weaver diversity index (H′), evenness index (J), Margalef richness index (R) and Simpson dominance index (λ) in the area near the abandoned Yellow River and the relatively uniform spatial distribution pattern was observed in the main irrigation canal in northern Jiangsu. It was found that depth, turbidity, pH and temperature were the main environmental factors affecting the differences in fish community structure in the investigated area. Comparing with the previous data, there was no significant change in the composition and structure of the fish. The findings indicated that species in Cyprinidae were the main species of fish in the Huaihe River channel and its adjacent waterways.
徐田振, 徐东坡, 周彦锋, 景丽, 葛优, 张晏江, 赵立祥, 刘鹏飞. 淮河入海通道及其附近水系鱼类群落空间分布格局[J]. 大连海洋大学学报, 2020, 35(6): 914-921.
XU Tianzhen, XU Dongpo, ZHOU Yanfeng, JING Li, GE You, ZHANG Yanjiang, ZHAO Lixiang, LIU Pengfei. Spatial distribution pattern of fish community in the passage from Huaihe River to sea and its adjacent river system. Journal of Dalian Ocean University, 2020, 35(6): 914-921.