Responsive mechanism of species extinction to the habitat destruction at different time scales;
物种灭绝对不同时间尺度人类活动的响应机制研究
However,the speed of species extinction is gradually accelerating as human being came to dominance.
地球出现生命以来,生物物种数量动态增长,但随着人类活动的出现,生物物种灭绝速度逐渐加快。
It is indicated that the species extinction is speeding, the endangered species are increasing.
本文探讨了生态系统和物种多样性所面临的威胁，指出目前物种灭绝的速度在加快，濒危物种在增多，生物多样性保护的重点应是濒危物种。
The species extinction is popular in nature,and extinctive factors are varions.
物种绝灭现象在自然界是普遍存在的 ,绝灭因素是多种多样的 ,绝灭和进化是生物发展史上的两个重要方面。
The rate of species extinction already appears to be accelerating.
而物种灭绝的速率，也已经开始上升。
As is often the case, humans are the primary cause of extinction.
通常情况下，人类是物种灭绝的主要原因。
This kind of animal is in danger of becoming extinct.
这种动物有灭绝的危险。
a species threatened by/with extinction
有灭绝之虞的物种.
A species can become endangered for different reasons.
一种生物濒于灭绝有多种原因。
an extinct fishlike vertebrate.
一种灭绝了的、像鱼一样脊椎动物。
an extinct ungulate.
一种已经灭绝的有蹄类动物。
They are clearly endangered species.
它们是明显的濒临灭绝的物种了。
Some species become extinct because of people's ignorance.
有些物种由于人们的无和而灭绝。
The giant panda has become an endangered species.
大熊猫已成了一种濒临灭绝的动物。
About a thousand species of animals are in danger of extinction,
大约有一千种动物濒临灭绝，
That species disappeared in the Ice Age.
那种生物在冰期就灭绝了。
one of the coiled chambered fossil shells of extinct mollusks.
一种已灭绝的头足类动物的化石脱壳。
Pleistocene glaciation caused the extinction of many species.
第四纪冰期，使许多物种绝灭。
Scientists say that seventy-four different kinds of living things go extinct every day!
科学家说每天有七十四种不同种类的生物灭绝！
The extinction of key species could have cascading effects throughout the food web.
关键物种的灭绝可能通过食物链产生级联效应。
On the indication system and Evaluation of Extinction Risk of species of plants;
植物物种绝灭风险指标体系及评价标准
Many species have disappeared or is going to disappear in future, which makes declines of biological persity.
不少物种已经绝迹或濒临灭绝，导致生物多样性的衰减。