The destruction of the biological chain, first of all, is due to its natural causes. For example, if a toxic substance is absorbed by the grass, although the concentration of the toxic substance is very low and does not affect the growth of the grass, it is difficult for the rabbit to excrete the toxic substance after eating the grass. When it often eats the grass, the toxic substance will gradually accumulate in its body, while when the eagle eats a large number of rabbits, the toxic substance will further accumulate in its body. Therefore, the food chain has the effect of accumulation and amplification.
美国国鸟白头鹰之所以面临灭绝,并不是被人捕杀,而是因为有害化学物质DDT逐步在其体内积累,导致生下的蛋皆是软壳,无法孵化。
The extinction of the American national bird, the bald eagle, is not caused by human killing, but because the harmful chemical DDT is gradually accumulated in its body, resulting in the laying of eggs are soft shells, unable to hatch.
由此可见,一个物种灭绝,就会破坏生态系统的平衡,导致其物种数量的变化,因此食物链对环境有非常重要的影响。
It can be seen that the extinction of a species will destroy the balance of the ecosystem and lead to the change of the number of species, so the food chain has a very important impact on the environment.
生物链的毁坏,还因为人类的参与。也许,在许多人心中,我们所做的种种行为都是在保护那一些动物,但是,一些不恰当的行为却起了“越帮越忙”的反效果,1907年美国人在开巴高原所做的事情就是一个很好的例子。大家可能也看过,《狼图腾》的作者姜戎先生几乎是用他自己亲身的经历,以人与狼、狼与食草动物、动物与草原的故事,诉说着古老的蒙古草原生物链怎样被人的贪婪和欲望,人的愚昧和武断一节一节地破坏掉。而这,也是不可否定的现实。人类为了自己的私心,不断猎杀动物,不断毁坏生物,严重导致了生物链的毁坏。
【生物链的重要性】相关文章:
★ 高一英语作文: If I Had a Million Dollars
★ 成长的烦恼
★ 高二英语作文:brought rain in April Mayflower
★ 特别的一天