Construction and application of health assessment index system for Lhasa River

Xin, 陈歆 Chen; Tiantian, 靳甜甜 Jin; Huidong, 苏辉东 Su; Junqiang, 林俊强 Lin; Dongbo, 王东波 Wang; Guohua, 刘国华 Liu; Junjie, 张俊洁 Zhang

doi:10.5846/stxb201809071919

Cited by 2 publications

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“…As an invasive species, it competes for resources with native fish from common species such as T. stenura and S. waltoni, to dominant species, S. younghusbandi. Based on the sampling information and previous studies [47], alien species are mainly distributed in the downstream area. So, protecting these native fish, especially in the downstream area, and reducing the invasion of alien species, may directly or indirectly increase the amount of resources and catch production.…”

Section: Implications Of Niche Analysis On Fishery Resource Conservationmentioning

confidence: 99%

Niche Analysis of the Main Fish in the Lhasa River Basin

Gao

Wang

et al. 2023

Water

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The Lhasa River is one of the five tributaries of the Yarlung Zangbo River. It is the main industrial, agricultural and animal husbandry area in Tibet. It plays an important ecological security barrier role in regulating regional climate and maintaining biodiversity. In order to understand the resource utilization ability and relationship of fish in Lhasa River, and provide basic data for the protection and sustainable utilization of fish diversity in Lhasa River, the fishery resources in September 2019 (autumn), June 2020 (summer), November 2020 (winter) and March 2021 (spring) were investigated for the first time. The main fish in the catch were determined by the Index of Relative Importance (IRI). Shannon index and Pianka’s index were used to analyze the niche breadth and overlap values of the main fish caught in Lhasa River Basin from three dimensions of time, space and space–time. The results show that a total of 1399 fish of 3 orders and 4 families were collected. Among them, there is one dominant species, Schizopygopsis younghusbandi, and five common species, Schizothorax waltoni, Schizothorax oconnori, Ptychobarbus dipogon, Triplophysa stenura and Carassius auratus. The spatial–temporal niche breadth ranges from 1.395 to 3.628. They are Schizopygopsis younghusbandi, Carassius auratus, Ptychobarbus dipogon, Schizothorax oconnori, Triplophysa stenura and Schizothorax waltoni in a declining order. The temporal niche breadth is generally small, indicating that the survival activities of the main fish are greatly affected by seasonal changes. The fluctuation range of spatial–temporal overlap value is 0–0.535, and only 20% of the total logarithm is meaningful. The species pairs with temporal niche overlap values exceeding 0.300 reached 80%, while the spatial niche overlap value is generally low. The results show that the spatial and temporal distributions of the main fish in Lhasa River were quite different, and the spatial and temporal niche overlap value of the relationship between species is obviously affected by the change in spatial distribution. This demonstrates that the competition relationship and intensity of the main fish are quite different in different spatial positions.

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Section: Implications Of Niche Analysis On Fishery Resource Conservationmentioning

confidence: 99%

Niche Analysis of the Main Fish in the Lhasa River Basin

Gao

Wang

et al. 2023

Water

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Study on Integrated Planning and Management in Lhasa River Basin

Yin

et al. 2020

E3S Web Conf.

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As a political, economic and cultural center of the Tibet Autonomous Region, the Lhasa River needs to take planning and management of the basin. In the past 60 years, the temperature of Lhasa River Basin has been increasing gradually at an annual rate of 0.047 ° C, which leads to the water cycle variation of the river basin and its associated aquatic ecology and environment continue to change and evolve, and ecological environmental protection is affected by more uncertain factors. Based on the assessment of the ecological environment of the Lhasa River Basin, the comprehensive planning suggestions for the Lhasa River Basin were proposed from the aspects of water environment, land use, ecological pattern, and economic and social development. These suggestions are drawn on the examples of integrated planning and management of catchment in foreign countries and are referred to as the comprehensive planning of the seven major river basins in China.

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Construction and application of health assessment index system for Lhasa River

Cited by 2 publications

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Niche Analysis of the Main Fish in the Lhasa River Basin

Niche Analysis of the Main Fish in the Lhasa River Basin

Study on Integrated Planning and Management in Lhasa River Basin

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