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我的疑问
请问,你这数据(70%)是从哪里来的?
我大概查了一下: 1、The National Science Foundation’s “Tree of Life” project estimates that there could be anywhere from 5 million to 100 million species on the planet, but science has only identified about 2 million.
2、How many species are there in the sea? Some 230,000 recorded so far.
上面数据的可靠性有待证实。但假设正确的话,那么你的70%这一数据就不正确了。而且已发现的物种仅仅是少部分,绝大多数物种已经存在,但并没有被发现,因此很难说海洋的生物物种一定比陆地上少。只能说,海洋生物物种被发现的相对较少。 www.ddhw.com
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