久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

New hope for lake rooted in aquatic plants

By LIU KUN in Wuhan and ZHANG YU | China Daily | Updated: 2023-04-29 11:08
Share
Share - WeChat
The National Field Station of Liangzi Lake Ecosystem, located on Niushazui island in the center of Liangzi Lake in Ezhou, Hubei province, focuses on the study of aquatic plants. [PHOTO by KE HAO/FOR CHINA DAILY]

Scientist pioneers use of weeds to improve water quality in ecological test

It's hard to imagine when seeing Yu Dan — dressed like a common worker, usually in crumpled, untidy clothing, splashed with mud or soaked with water — that he is a professor at a famous university.

Yet Yu is a professor at the College of Life Sciences of Wuhan University in Hubei province.

His life has revolved around aquatic weeds since the 1990s.

For more than three decades, the 66-year-old has devoted himself to planting weeds in a large lake in Hubei in order to reduce its contamination and improve its ecosystem, and his efforts have been paying off. The lake's water quality and ecosystem have greatly improved.

Liangzi Lake, Hubei's second-largest freshwater lake, is the object of his attention and his workplace.

The lake, situated in the cities of Wuhan, Huangshi, Ezhou and Xianning in Hubei, has a total water surface of 328.2 square kilometers, according to Ezhou's bureau of water resources.

Working and living on the lake's Niushazui island, Yu and his students have planted more than 13,000 hectares of aquatic weeds, which, along with natural weeds, form an underwater forest sprouting beneath the lake's surface.

Because of that work, Liangzi Lake has the best water quality of any lake in the middle and lower reaches of the Yangtze River.

As leader of the National Field Station of Liangzi Lake Ecosystem, Yu spends more than 300 days a year on Niushazui island, where it is housed.

He developed an interest in aquatic weeds while in college in Northeast China.

"At that time, there was almost zero study of aquatic plants in our country," he said. But he was determined to explore the mysterious world.

Back in 1990s, Yu went to Wuhan for postdoctoral research on the aquatic vegetation of lakes in the middle and lower reaches of Yangtze.

"At the first sight of Liangzi Lake, which presented its clear water, swaying grass, and living shrimp and crabs, I fell in love with it," he recalled.

In 1992, Yu founded an observation station on Niushazui island to conduct a follow-up survey of aquatic plants.

There were only a few trees and several stone houses of local fishermen on the island, making the work lonely and hard.

Yu and his students lived in fishermen's houses and borrowed fishing boats to collect aquatic plant seeds in their first few years on the island.

"In order to research aquatic weeds, abundant and different weed samples are necessary," said Xu Xinwei, one of Yu's students.

"We went to places almost all over the country, as long as it had an aquatic area, bringing specimen containers with us," Xu said.

In their travels, they collected more than 400,000 specimens from countless bodies of water and studied more than 30,000 aquatic plant communities.

Their research yielded accurate data and scientific analysis on aquatic plants, and that provided basic theoretical and practical information for the ecological reconstruction of plant communities and restoration of degraded lakes in the country, Hubei Daily reported in an article on April 3.

In 1998, Liangzi Lake was struck by extreme flooding that killed almost all of its water plants and fish. It was a severe blow to the lake's ecology, and its water quality deteriorated from Grade II to Grade IV, the second-worst level in China's five-tier categorization system of surface water quality.

Yu put forward a bold idea — planting aquatic weeds at the lake's bottom and letting the weeds help purify the water.

At the time, there was no successful precedent in China or elsewhere for large-scale planting of underwater plants. "Even so, we needed to try," Yu said.

1 2 3 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: 国产高清精品一区 | 成人av手机在线观看 | 久久成人小视频 | 免费国产视频在线观看 | 久久国产乱子伦精品免费不卡 | 最新理论三级中文在线观看 | 福利视频美女国产精品 | 国产草草影院ccyycom软件 | 欧美日韩精品免费一区二区三区 | 日本三级日产三级国产三级 | 亚洲国产高清在线精品一区 | 欧美成人一级片 | 日本尹人综合香蕉在线观看 | 玖玖精品视频在线 | 免费一区二区三区四区五区 | 日韩欧美成末人一区二区三区 | 国内自拍2020 | 天天躁天天碰天天看 | 2019在线亚洲成年视频网站 | 国产91精品露脸国语对白 | 久久精品亚洲精品国产欧美 | 国产亚洲精品午夜高清影院 | 免费国产不卡午夜福在线 | 欧美亚洲另类久久综合 | 欧美成人午夜免费完成 | 中文字幕一区二区三区有限公司 | 亚洲国产一区在线二区三区 | 久久国产精品99久久久久久牛牛 | 韩国精品一区视频在线播放 | 久久国产午夜精品理论片34页 | 欧美 亚洲 中文字幕 | 国产亚洲人成a在线v网站 | 成人夜色视频网站在线观看 | 欧美成人爽毛片在线视频 | 国产成人午夜福在线观看 | 国产亚洲一欧美一区二区三区 | 免费观看a毛片一区二区不卡 | 国产欧美精品三区 | 国产性videostv另类极品 | 成人毛片1024你懂的 | 精品国产90后在线观看 |