In the reconstruction of "Pandora" as the theme of the course last week, the teacher and the children together to discuss the topic of "alien species invasion", don't think it's a fable that the alien species oh, teachers in a common water hyacinth plants, scientific name "crassipes" opened for you caused by invasive species and the ecosystem system disorder, may before the children think this is just the scientific research workers work, but since we are all a part of ecological environment, when you know there will be "alien species" invasion of your home, what would you think? What would you do?

Water hyacinth at the 1844 American exposition was described as "beautifying the world of lilac corolla." Since then, water hyacinth as ornamental plant cultivation has been around the world, in the early 19th century as a flower into China, the '30 s as livestock and poultry feed was introduced into China mainland provinces, and as ornamental and purify plants cultivated, due to its extremely fast asexual reproduction, are widely distributed in 19 provinces in our country, especially in Yunnan, Jiangsu, Zhejiang, Fujian, Sichuan, Hunan, Hubei, Henan and other places of invasion. Due to the rapid reproduction and few competitors and natural enemies, it quickly spread into disaster, resulting in the imbalance of water system ecosystem, and even caused disasters to many waters.

Children observe the ecological characteristics of plants