Fish Community Structure and Ecological Health Assessment of the Shuaishui River Basin, China

Fang, Y.; Liu, G. J.; Liu, R. J.

doi:10.46488/nept.2021.v20i01.016

Cited by 3 publications

(4 citation statements)

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“…temperature, salinity and dissolved oxygen) often have significant effects on fish community diversity and its spatial and temporal distribution (Dong et al, 2017). RDA showed that the main factors affecting fish distribution were pH, WD and WT; changes in altitude cause environmental factors such as WT, water velocity and DO to change accordingly (Fang et al, 2021). Water temperature affects the reaction rate of fish metabolism in regulating their basal metabolism, growth and development, enzyme activity levels and disease resistance, which might affect the modification of local species compositions(Rui et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Section: Environmental Factors That Affected the Distribution Of Fish...mentioning

confidence: 99%

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Fish community structure and its relationships with environmental variables in subtropical headwater rivers

Yang

wen

et al. 2022

Ecology of Freshwater Fish

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Fish community structure could be directly and indirectly affected by biotic, abiotic and anthropogenic factors. Although fish community suffered less disturbance than big rivers, moderate disturbance could also change fish community structure in mountain rivers due to environmental variables such as current velocity, water depth, water temperature, dissolved oxygen and acidity. However, there are limited information about changes in fish composition in mountain river where less human disturbance. So the objective of this study was to elucidate fish diversity and community assembly patterns and identify relationships between environmental parameters and fish community structures. This survey was conducted seasonally at 16 locations in five rivers in Pingxiang city from June 2019 to May 2020. A total of 56 species were collected, and 16 fish species were endemic to China. The index of relative importance showed that Rhodeus ocellatus was the most dominant species in these rivers. The fish species showed low abundance and diversity in Pingxiang city. Cluster and non-metric multidimensional sequencing analyses showed clear spatial segregation, which divided the 16 sample sites into four significantly different groups. Permutational analysis of variance showed a significant difference in fish composition among the sites (p = .002). Furthermore, similarity percentages analysis showed that 15 fish species contributed to the greatest extent, and 13 fish species were divergent among the groups. The redundancy analysis revealed that water depth, pH and water temperature were the predominant factors contributing to the variation in fish composition. Thus, these results could guide the restoration and spatial management of fish resources as well as provide theories for the formulation of relevant conservation policies.

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Section: Discussionmentioning

confidence: 99%

Section: Environmental Factors That Affected the Distribution Of Fish...mentioning

confidence: 99%

Fish community structure and its relationships with environmental variables in subtropical headwater rivers

Yang

wen

et al. 2022

Ecology of Freshwater Fish

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“…It has a total length of 436.5 km with a natural fall of 1473.9 m and a watershed area of 21,010 km 2 [35]. The river can be divided into three sections: the upstream reaches 224.7 km long with 1274.8 m natural fall and ranges from the source to Maotai Town; the midstream reaches 157.8 km long with 182.9 m natural fall and extends from Maotai Town to Chishui City; and the downstream reaches 54 km long with 16.2 m natural fall and stretches from Chishui City to the confluence with the Yangtze River in Hejiang County [38].…”

Section: Study Areamentioning

confidence: 99%

“…This region is located in the border area of Yungui Altiplano and Sichuan Basin in southwestern China, and the topography is dominated by typical Danxia landforms, which are characterized by a red-bedded geomorphology of steep cliff slopes [35]. The study area is characterized by a subtropical monsoon climate with water temperatures from 8.8 • C in January to 26 • C in August, and an average annual rainfall of about 1200 mm [38]. The reaches flow in channels with a softer slope and the substrates of the riverbed are a mix of laterite and boulders [34].…”

Section: Study Areamentioning

confidence: 99%

Food Web Structure and Trophic Interactions Revealed by Stable Isotope Analysis in the Midstream of the Chishui River, a Tributary of the Yangtze River, China

Qin

Zhang

Liu

et al. 2021

Water

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Understanding energy flow and nutrient pathways is crucial to reveal the dynamics and functions of riverine ecosystems and develop appropriate conservation strategies. In this study, we utilized stable isotopes of δ13C and δ15N to examine the fundamental characteristics of trophic position, trophic niche, and carbon source for the food web in the midstream of the Chishui River, a tributary to the Yangtze River. Our results showed that stable isotope signatures among different sorts of basal resources and consumers were significantly distinguishable and that the food chain consisted of four trophic levels, indicating the multiple trophic pathways and long food chain length here. The trophic guilds of fish were classified into four categories, in which herbivorous and carnivorous fish showed greater trophic diversity and omnivorous fish had higher trophic redundancy, which meant that there was a stable trophic niche structure in the study area. Phytoplankton and periphyton presented the largest contributions to consumers, indicating that autochthonous productivity was the dominant carbon source in the midstream of the Chishui River. Since the Chishui River is still in a natural condition without any dam constructions, the autochthonous productivity, stable trophic niche structure, multiple trophic pathways and long food chain length found here demonstrate its high conservation value. Therefore, the strategy to refrain from damming on this river should persist into the future.

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How do ecosystem service functions affect ecological health? Evidence from the Yangtze River Economic Belt in China

Wang,

Yang,

Yang

et al. 2024

Environ. Sci.: Processes Impacts

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Fish Community Structure and Ecological Health Assessment of the Shuaishui River Basin, China

Cited by 3 publications

References 0 publications

Fish community structure and its relationships with environmental variables in subtropical headwater rivers

Fish community structure and its relationships with environmental variables in subtropical headwater rivers

Food Web Structure and Trophic Interactions Revealed by Stable Isotope Analysis in the Midstream of the Chishui River, a Tributary of the Yangtze River, China

How do ecosystem service functions affect ecological health? Evidence from the Yangtze River Economic Belt in China

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