日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

Global EditionASIA 中文雙語Fran?ais
China
Home / China / Environment

Fish species on brink of extinction as water quality declines

By Li Yang | China Daily | Updated: 2018-11-25 10:00
Share
Share - WeChat
The Wuhan section of the Yangtze River. [Xinhua]

Textbooks used in middle schools often call the Yangtze River one of the Mother Rivers of China as it has 49 tributaries, each with a drainage area of more than 10,000 square kilometers, and hundreds of attached lakes.

It is home to 424 types of fish, of which 183 are endemic, and the categories of freshwater fish in the river comprise 33 percent of the national total.

But President Xi Jinping has said that the country's longest river is almost a "fish desert".

In an April meeting in Wuhan, Hubei province, that focused on the Yangtze River Economic Belt, the president said the bio-integrity index of the Yangtze has reached the "no fish" level. This means that the river's water ecology has fallen to its lowest biodiversity level.

Six months later, the State Council, China's Cabinet, urged local governments to strengthen protection of aquatic species and accelerate restoration of the Yangtze's ecological environment.

The 6,380-kilometer waterway is the third-longest river in the world - after the Nile (6,670 km) and the Amazon (6,400 km). The Yangtze has a total drainage area of 1.8 million sq km, home to a population of some 400 million people.

Over the past 20 years, the urban area located in the river's drainage basin has increased by about 40 percent.

But a high population and economic burden has taken its toll.

The Yangtze River Dolphin was declared functionally extinct in 2006, there were only about 1,000 finless porpoise remaining in the Yangtze by the middle of this year and the Chinese paddlefish has not appeared in the river since 2003.

The Chinese sturgeon, Chinese sucker fish, Chinese rock carp and Dabry's sturgeon - all endemic to the Yangtze - are also on the brink of extinction.

Cao Wenxuan, an academician specializing in aquatic organisms in the middle and upper reaches of the Yangtze with the Chinese Academy of Sciences, said the waters in these reaches of the river are home to 43.3 percent of 124 types of endemic fish, so they deserve special attention and protection.

1 2 3 4 5 Next   >>|
Top
BACK TO THE TOP
English
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
主站蜘蛛池模板: 色婷婷久久久 | 久久精品国产99久久6动漫亮点 | 欧美午夜精品一区二区蜜桃 | 添人人躁日日躁夜夜躁夜夜揉 | 国产精品99久久久久久久女警 | 伊人久操 | 色网站综合 | 激情深爱 | 色婷婷视频 | 性高湖久久久久久久久aaaaa | 亚洲欧美国产精品久久 | 奇米影视 首页 | 午夜影院在线看 | 一区二区在线不卡 | 一本色道久久88加勒比—综合 | 日韩精品一区二区三区中文字幕 | 亚洲aaa视频| 一区二区三区在线观看视频 | 国产成人久久精品二区三区牛 | 国产精品99| 日韩精品a在线视频 | 二区三区四区 | 亚洲国产二区 | 久久精品欧美一区 | 成人网av | 成人激情综合网 | 国产精品片aa在线观看 | 日韩理论在线 | 久草在线首页 | 中文字幕视频在线观看 | 亚洲国产精品视频一区 | 国产精品美女久久久久久免费 | 久久夏同学国产免费观看 | 欧美在线另类 | 免费高清伧理片午夜伧理片 | 亚洲精品国偷拍自产在线观看蜜桃 | 久久草在线 | 久久精品久久精品久久 | 91视频视频 | 日韩精品中文字幕久久 | 精品无人乱码一区二区三区 |