The harm of water hyacinth!

There are many water hyacinths on Baidu, especially the harm of water hyacinth: Although water hyacinth itself has a strong ability to purify sewage, a large number of water hyacinths cover the river, which is easy to cause water quality deterioration and affect the growth of underwater creatures. Water hyacinth breeds very fast and consumes a lot of dissolved oxygen when it grows, which is almost synonymous with "pollution". Well-known water bodies such as Dianchi Lake, Taihu Lake, Huangpu River and Wuhan East Lake have all been submerged by water hyacinths, which cannot be cured at great cost. The case of water hyacinth causing losses to Dianchi Lake is one of the classic cases of invasive species. In 1980s, Kunming built an ideal water tourist route from Daguan River to Dianchi Lake and Xishan Mountain, where tourists can visit Dianchi Lake and Xishan Mountain by boat from downtown. However, in the early 1990s, Daguan River and Dianchi Lake water hyacinth flooded, covering the whole river surface and part of the water surface of Dianchi Lake, forcing this tourist route to be cancelled, and the supporting tourist facilities built on both sides of Daguan River had to be abandoned or used for other purposes, and Daguan River was also transformed into an underground river. These are only direct economic losses, but the ecological losses caused by water hyacinth are difficult to estimate. Fujian media reported the first outbreak of water hyacinth in China in 2007. The water hyacinth in the upper reaches of Minjiang River covers the whole reservoir area of Shuikou Dam, covering an area of nearly 2,400 mu. Subsequently, the name water hyacinth appeared in newspapers all over the country, becoming the most exposed plant since the first half of this year: in mid-April, water hyacinth appeared around the Three Gorges reservoir area, and the water hyacinth of Huangbai River in Yichang had blocked the river; In mid-May, the gourd of Huatan River in Nanchong City, Sichuan Province blocked the river for 3 kilometers; At the beginning of June, Chongqing Huaxi Hulu was blocked for 4 kilometers; At the same time, Sichuan Huaneng Qingju Hydropower Station located on Jialing River was invaded by a large number of water hyacinths. At the beginning of July, water hyacinth broke out in the upper reaches of Qiantang River in Zhejiang Province, and Fuchunjiang Reservoir was not spared. In the same period, water hyacinth broke out on a large scale in Jinshan and Songjiang, Shanghai, and only Jinshan District salvaged at least 550 tons every day; In mid-August, the water hyacinth of Lianhu Lake in Anqing City, Anhui Province invaded nearly 1,000 mu of water surface; At the beginning of September, water hyacinth broke out in Laodao River, Hunan Province, with a thickness of 3 meters, and fishermen could walk on it. Previously, the water hyacinth of Liuyang River had blocked the river for several kilometers. Water hyacinth also flooded the Xujiang River ... 20 12 65438+ 10 3 1 Wankou Village, Shuikou Town, Fujian Province [2] On September 6, 2007, Haitang Property Management Company directly under the Qiantang River Administration of Zhejiang Province discovered water hyacinth on the Qiantang River. In order to clean up the water surface in time, the company has sent six salvage boats and more than 80 cleaners to salvage day and night. As of the 9th, 350 tons have been salvaged. It is reported that water hyacinth grows very fast and can cover the whole water surface in a short time, consuming a lot of dissolved oxygen, forcing aquatic organisms to survive, especially in autumn, its roots and leaves will rot rapidly, which not only blocks water traffic, but also pollutes water sources. 201265438+1October 3 1, in Wankou Village, Shuikou Town, Gutian County, Ningde City, Fujian Province, the mighty water hyacinth stretches for nearly 10 km of Minjiang River, like a grassland. Surrounded by water hyacinth, fry can't be stocked.