www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

US EUROPE AFRICA ASIA 中文
Business / Green China

Fish ecosystem on Yangtze 'on verge of collapse'

By Yang Yao (China Daily) Updated: 2013-08-16 01:42

Fish ecosystem on Yangtze 'on verge of collapse'

Landscape changes since 2005 along the banks of the Chishui River, a tributary of the Yangtze River, suggest the grave effects of human activity on the ecosystem of China’s longest river. [PHOTO BY WANG LEI / FOR CHINA DAILY]

Human activity along the upper reaches of the Yangtze River - such as building hydropower stations and excessive fishing - has pushed its aquatic ecosystem to the verge of collapse, a report released on Thursday warns.

Researchers suggested starting a fishing ban along the entire river and enacting a national law to protect the "mother river" of China, as its fishery resources are experiencing a severe recession.

The number of fish in four major species has shrunk from more than 30 billion in the 1950s to less than 100 million, and the number of breeds has been reduced from 143 to 17, according to the report released by the Yangtze River Fishery Resources Committee under the Ministry of Agriculture and the World Wide Fund for Nature.

The report is based on a 12-day scientific expedition in five provincial-level regions in June, in which 32 researchers from government agencies and NGOs participated.

It was the first expedition of its kind to study the upper reaches of the Yangtze River regarding wetlands, aquatic diversity and water environment, according to the WWF.

Besides the sharp decrease in the number of fish, some species, such as the finless porpoise, have already become extinct, said Zhao Yimin, head of the Yangtze River Fishery Resources Committee.

The plight along the river is not catching much public attention "as people can buy fresh fish from a wet market every day. They don't realize how serious the situation is", Zhao said.

"The source species are reducing, leading to unsustainable development of aquaculture and an increasingly fragile ecosystem."

Zhao said China's fishery resources will be drained soon if no immediate action is taken.

The report cited over-exploitation of hydropower and lax law enforcement as major reasons behind the dire situation.

On the Jinsha River, 25 hydropower plants are being, or will be built 100 km apart along the 2,308 km tributary of the Yangtze, according to the country's energy development plan.

Once completed, the plants will have power-generating capacity equivalent to four Three Gorges Dam projects.

"It will cut the river into sections, and completely change the aquatic environment, bringing a devastating impact to species and water quality," Zhao said.

According to environmental laws, a power plant has to pass an environmental impact assessment before construction starts. However, a majority of the projects go ahead without any assessment, Zhao said.

Previous Page 1 2 Next Page

Hot Topics

Editor's Picks
...
主站蜘蛛池模板: 中文字幕 亚洲 一区二区三区 | 成人午夜兔费观看网站 | 久久精品国产大片免费观看 | 毛片手机在线 | 国产一区二区影视 | 中文字幕亚洲不卡在线亚瑟 | 精品国产一区二区三区2021 | 亚洲精品国产成人 | 男女扒开双腿猛进入免费网站 | 国产亚洲欧美日韩在线观看不卡 | 万全影院亚洲影院理论片 | 免费人成黄页网站在线观看国产 | 深夜福利视频在线看免费 | 久久久国产精品免费视频 | 两性色午夜视频免费国产 | 国产高清在线免费视频 | 美国免费高清一级毛片 | 高清不卡毛片 | 久草视频福利在线观看 | 91久久精品国产免费一区 | 国产日韩亚洲不卡高清在线观看 | 精品国产免费一区二区三区 | 韩国一级免费视频 | 国产乱码精品一区二区三区卡 | 美女插跳蛋视频叫爽 | 成人高清在线观看 | 国产女厕所 | www.亚洲免费| a级毛片毛片免费观看久潮喷 | 玖玖玖精品视频免费播放 | 97超频国产在线公开免费视频 | 日本一区毛片免费观看 | 日本国产欧美色综合 | 日韩欧美三级在线观看 | 色综合美国色农夫网 | 中文乱码一二三四有限公司 | 欧美经典成人在观看线视频 | 国产中文字幕视频 | 免费看成人频视在线视频 | 国产一区二区在线视频播放 | 久久精品观看 |