影响长江鱼类资源及鱼类生境的研究

Study on Factors Affecting Fish Resources and Fish Habitat in the Yangtze River

鱼类资源急剧减少,鱼类生境遭到人类的肆意破坏,若人类还不有所行动,自然生态将会遭到严重破坏。本文通过水文水动力模拟和水动力模拟的方法,建立长江部分河段的鱼类生态模型。选择基于个体模型对鱼类进行研究。运用数值分析和建模的双重作用得出结论。通过建模分析现阶段长江河段鱼类自然生态环境,研究水温水质、流速对鱼类生存的影响,从而探究鱼类适宜的生存条件,使更多的鱼类能得以生存,人工繁殖的鱼苗流入长江后能尽快适应其环境。人与自然和谐共存的生态理念才得以真正的实现。

Fish resources have been drastically reduced and fish habitats have been vandalized by humans. If humans do not take action, the natural ecology will be severely damaged. In this paper, the hydrodynamic simulation method was used to establish the fish ecology model in some sections of the Yangtze River. The fish was studied based on individual models. The dual role of numerical analysis and modeling were used to draw conclusions. The current ecological environment of fishes in the Yangtze River reach is modeled and analyzed to study the effects of water temperature, water quality, and flow velocity on fish survival, so as to explore suitable living conditions for fish so that more fish can survive, and artificially propagated fry can adapt to its environment as soon as possible after entering the Yangtze River. The ecological concept of harmonious coexistence between man and nature can be truly realized.