金沙江产卵地生态成功恢复的数值模拟

IF 1.8 4区环境科学与生态学 Q2 FISHERIES

Marine and Freshwater Research Pub Date : 2023-10-09 DOI:10.1071/mf23100

Yuqian Xi, Pengcheng Li, Xiaolan Pang, Yu Han, Junqiang Lin, Qianqian Wang, Yike Li, Weiwei Yao

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引用次数: 1

摘要

在金沙江上修建水坝会影响鱼类产卵地，导致鱼类数量减少。目的建立了一个模型，以评价在产卵地生活的鱼类恢复策略的生态状况。方法该模型由水形态动力学和生境两个模块组成。将模型方法应用于两种修复策略(边河道增加和河岸重建)及其相应的修复后效果。主要结果利用3个指标评价了产卵地的生态状况。模拟结果显示，当前水文条件下生态状况较差，加权可用面积和综合适宜性指数分别为1.07 × 106 m2和0.41。如果不实施恢复策略，生态状况将继续破碎和恶化。结论在边渠和建岸方案下，加权可利用面积可恢复到2.86 × 106 m2和1.67 × 106 m2。综合适宜性指数分别为0.67和0.63。生态恢复策略(增加侧道)可以显著改善淡水里维斯鱼的生境状况。此外，恢复策略也说明了边信道附加恢复策略的可行性。

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Numerical modelling for ecologically successful spawning-site restoration in Chin-sha River, China

Context The construction of dams on the Chin-sha River will affect fish spawning sites, leading to a decline in fish species. Aims This paper presents a model to evaluate the ecological status of restoration strategies aimed at fish species living at a spawning site. Methods The model comprises hydro-morphodynamic and habitat modules. The modelling approach was applied with two restoration strategies (side-channel addition and riverbank reconstruction) and their corresponding post-restoration effects. Key results Three indicators were utilised to assess the ecological status of the spawning site. Modelling results showed poor ecological status under current hydrological conditions, with weighted usable area and overall suitability index values of 1.07 × 106 m2 and 0.41. Without implementing a restoration strategy, the ecological status would continue to fragment and deteriorate. Conclusions The weighted usable area can be recovered to 2.86 × 106 and 1.67 × 106 m2 in scenarios of side-channel and bank construction respectively. The overall suitability index values increase to 0.67 and 0.63 respectively. Implications It is also noted that the ecological restoration strategy (side-channel addition) can considerably enhance the freshwater Reeves shad’s habitat status. Additionally, the restoration strategy illustrated the feasibility of the side-channel addition restoration strategy.

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来源期刊

Marine and Freshwater Research 环境科学-海洋学

CiteScore

4.60

自引率

5.60%

发文量

审稿时长

3.8 months

期刊介绍： Marine and Freshwater Research is an international and interdisciplinary journal publishing contributions on all aquatic environments. The journal’s content addresses broad conceptual questions and investigations about the ecology and management of aquatic environments. Environments range from groundwaters, wetlands and streams to estuaries, rocky shores, reefs and the open ocean. Subject areas include, but are not limited to: aquatic ecosystem processes, such as nutrient cycling; biology; ecology; biogeochemistry; biogeography and phylogeography; hydrology; limnology; oceanography; toxicology; conservation and management; and ecosystem services. Contributions that are interdisciplinary and of wide interest and consider the social-ecological and institutional issues associated with managing marine and freshwater ecosystems are welcomed. Marine and Freshwater Research is a valuable resource for researchers in industry and academia, resource managers, environmental consultants, students and amateurs who are interested in any aspect of the aquatic sciences. Marine and Freshwater Research is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.