珠江水生态现状及保护对策

Aquatic Ecological Status of Pearl River and Protection Measures

珠江自然地理条件优越,适合水生生物生存。但是随着珠江流域经济的发展,人为活动对珠江的水生态状况产生严重威胁:入河排污量逐年增大;大型水电梯级工程的开发导致河流水位连续性下降,水体自净能力降低,富营养化现象逐年加剧;大坝阻挡了洄游性鱼类的迁移通道,鱼类种群多样性逐年递减,大量鱼类种群处于濒危状态,渔获量大幅下降;水生生物丰度增加,生物多样性却不断下降。为此,针对珠江水生态现状提出了相应的保护对策,以维护珠江的河流健康和可持续发展。

There is a perfect natural and geographical condition for the aquatic organisms in the Pearl River.However,the human activities influence the water environment with the development of the industry:More wasted water was poured into the Pearl River; The huge dams stopped the migration fishes and the abundance of fish decreased year by year;The abundance of phytoplankton and zooplankton increased but the diversity decreased.Some measures should be taken to protect the water environment so that the Pearl River can be developed sustainably.