"Four everybody fish" and other species resources decline, decline continued in Yangtze River water...... For the correlations between the root of these questions and each other. Yesterday, from the Yangtze River Fishery Resource Management Committee Office ("long fishing ban") and the World Wide Fund for nature ("WWF") Co sponsored "the beautiful Yangtze River upper reaches of the Yangtze River, Chinese life" joint research in Shanghai yesterday to start, and call on the whole society to pay attention to and participate in.
Three angles comprehensive physical examination
This is the first time from the wetland ecosystem, aquatic biodiversity and environmental flow angle, a comprehensive scientific survey of the source and upper reaches of the Yangtze river. In 12 days is expected to study time, the delegation travel along the Yangtze River nearly 4000 kilometers, starting from the source of the Yangtze River in Yushu, visited the Tiger Leaping Gorge along the Jinsha River Valley, Yibin, from the survey of natural river gradually to the planning and construction of cascade hydropower in upper reaches of the Yangtze River to the Yangtze River, and finally a dam as a study endpoint tributary of Chishui river.
"Before, we focus on the middle and lower reaches of Yangtze river. The expedition will be truly wetlands along the Yangtze River to the field of network." Dr. Yong Yi WWF expresses to the reporter, in recent years, with the rapid development of the Yangtze River economic belt, the ecological environment in the Yangtze Basin by the superposition effect of human activities and global change, watershed ecosystem health and biodiversity protection is facing a great threat. Specialist will be on-site inspection main threats facing the three fields.
"Four people fish fry volume drop
"The Yangtze River is the third longest river in the world, but its importance is not inferior to the first and second." Fudan University professor Chen Jiakuan said that the Yangtze River Basin issues are very complicated, each region is different, so very concerned about the change of the Yangtze River Basin in the last ten years.
"Such as daily on the public table" four everybody fish ', Germplasm Resources in decline." Long Yu office responsible person told the reporter, the Yangtze River in the prestigious "four everybody fish" (black carp, grass carp, silver carp, bighead carp) occurred by the sharp decline in the volume of fry, the last century 50's about 30000000000 tail drop to less than the current 100000000 tail, "although the public feeling to eat is not reduced, but most of them are artificial breeding."
WWF said that the Yangtze River water 2007-2009 consecutive years less than the normal year 6.9%, 11.7% and 11.5%. At the same time, due to hydropower engineering, reclamation, pollution and other human activities lead to aquatic biota migration channels and spawning grounds and other important natural habitats occupied, wetland ecosystem degradation, biodiversity loss. The Yangtze River Basin of each species resource status are in decline trend. ( |
