荒野协会游说国会批准《濒危物种法》。
The Wilderness Society lobbied Congress to authorize the Endangered Species Act.
濒临灭绝物种的名单中列有将近600种鱼。
这些物种中的许多已经消亡或是正濒临灭绝。
Many of these species have vanished or are facing extinction.
该物种的繁殖力没有明显下降。
海星消失后，物种多样性急剧下降。
When sea stars are removed, species diversity falls sharply.
这时，亚种群已经进化成不同的物种。
At this point the subpopulations have evolved into distinct species.
这些物种都有独特的视觉中心，眼睛很大。
这种划分为鱼类和其他海洋物种的分区物种形成奠定了基础。
This division set the stage for allopatric speciation among populations of fishes and other marine species.
这种雉鸡和这种珍珠鸡是亲缘物种。
美洲驼和骆驼是近亲物种。
自然环境保护主义者大多致力于保持物种的多样性。
Conservationists are mostly wedded to preserving diversity in nature.
葡萄酒制造商们说他们已被谷物种植者的利益所左右。
Wine growers say they've been held hostage to the interests of cereal farmers.
物竞天择确保只有最适应环境的物种才得以生存下来，把基因传递给下一代。
Natural selection ensures only the fittest survive to pass their genes on to the next generation.
全球变暖的后果之一是物种灭绝。
外来物种和本地物种的区分是人为的。
Distinctions between exotic and native species are artificial.
提升效率和增加食物种类。
多年生植物种植者呢？
他们说把外来物种描绘成天生的坏物种是一种不科学的做法。
They say that portraying introduced species as inherently bad is an unscientific approach.
令人惊讶的是，本土物种的灭绝很少归因于外来物种的竞争。
Surprisingly few extinctions of indigenous species can be attributed to competition from introduced species.
如果秃鹰从濒危物种名单上除名，它仍然是一个受到威胁的物种。
If it were dropped from the Endangered Species List, the bald eagle would still be a threatened species.
这些包括近100个狐猴物种，其中六种被认为属于严重濒危物种。
These include nearly 100 species of lemur, six of which are deemed critically endangered.
生态学家通常把外来物种定义为人们偶然或故意带到新地方的物种。
Ecologists generally define an alien species as one that people, accidentally or deliberately, carried to its new location.
竞争对物种的进化效应被称为“物种选择”；然而，这种描述可能具有误导性。
The evolutionary effect of competition on species has been referred to as "species selection"; however, this description is potentially misleading.
不同物种之间的寿命存在显著差异，但在同一物种内，这一参数是相对稳定的。
There are striking differences in life span between different species, but within one species the parameter is relatively constant.
如果一个以上的物种竞争稀缺的资源，竞争的物种通常会转向不同的替代资源。
If more than one species is competing for a scarce resource, the competing species usually switch to different alternative resources.
一个物种生存下来的标准是它能否成功地与其他物种竞争并适应缓慢变化的环境。
The standard criterion for the survival of a species is its success in competing with other species and adapting to slowly changing environments.
正如你记得的那样，（物种）适应是有助于一个物种生存或繁殖的生理或行为特征。
As you recall, an adaptation is a physical or behavioral feature of a species that helps it survive and reproduce.
对一个物种的福祉和生存的影响，只是对该物种所有个体的选择所造成影响的结果。
The effect on the well-being and existence of a species is just the result of the effects of selection on all the individuals of the species.
在美国总共15万的物种中，有7000种外来物种，当中只有10%是入侵物种。
Of the 7,000 alien species in the United States—out of a total of 150,000 species—only about 10% are invasive.
在美国总共15万的物种中，有7000种外来物种，当中只有10%是入侵物种。
Of the 7,000 alien species in the United States—out of a total of 150,000 species—only about 10 percent are invasive.
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