The list of endangered species includes nearly 600 fishes.
濒临灭绝物种的名单中列有将近600种鱼。
Many of these species have vanished or are facing extinction.
这些物种中的许多已经消亡或是正濒临灭绝。
Distinctions between exotic and native species are artificial.
外来物种和本地物种的区分是人为的。
The species showed no significant decline in fecundity.
该物种的繁殖力没有明显下降。
These species have distinctive visual centers and big eyes.
这些物种都有独特的视觉中心，眼睛很大。
This is closer to biology, especially with speciation, how two distinct species form from one.
它更接近生物，尤其是物种的形成，也就是一个物种如何形成两个截然不同的物种。
When sea stars are removed, species diversity falls sharply.
海星消失后，物种多样性急剧下降。
At this point the subpopulations have evolved into distinct species.
这时，亚种群已经进化成不同的物种。
This division set the stage for allopatric speciation among populations of fishes and other marine species.
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。
Competition among species is of considerable evolutionary importance.
物种间的竞争在进化上具有相当重要的意义。
Somewhat later, the migrants returned, bringing new species with them.
不久之后，移民回来了，还带来了新的物种。
That's what a keystone species does in an ecosystem.
那就是拱顶石物种在生态系统中的作用。
The author does imply this by talking about unknown species.
作者确实通过谈论未知物种暗示了这一点。
The faster-growing species are the preferred food of the CoT starfish.
刺冠海星更喜欢吃长得快的物种。
Surprisingly few extinctions of indigenous species can be attributed to competition from introduced species.
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。
Although diet varies from species to species, many primates are largely vegetarian.
虽然不同物种的饮食不同，但许多灵长类动物基本上都是素食者。
Although diet varies from species to species, many primates are largely vegetarian.
虽然不同物种的饮食不同，但许多灵长类动物基本上都是素食者。
A symbiotic relationship is an interaction between two or more species in which one species lives in or on another species.
共生关系是两个或多个物种之间的相互作用，其中一个物种生活在另一个物种体内，或依靠这一物种生活。
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.
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。
If it were dropped from the Endangered Species List, the bald eagle would still be a threatened 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。
The biggest was the Endangered Species Act of 1973, which protects imperiled animal species from extinction.
其中最著名的是1973年的《濒危物种法案》，该法案旨在保护濒临灭绝的动物物种。
Because complex species interactions may be involved, identifying a keystone species by removing the species and observing changes in the ecosystem is problematic.
由于其中可能涉及复杂的物种相互作用，通过移除一个关键物种并观察生态系统的变化来确定该物种是有问题的。
The evolutionary effect of competition on species has been referred to as "species selection"; however, this description is potentially misleading.
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。
As you know the evolution of any species is largely influenced by its interactions with other species.
正如你所知道的，任何物种的进化在很大程度上都受到它与其他物种相互作用的影响。
There are striking differences in life span between different species, but within one species the parameter is relatively constant.
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。
At the other extreme, we might successfully translocate the species, but within five or ten years that species could proliferate and become an invasive species.
在另一个极端，我们可能会地转移这个物种，但是在5至10年内，这个物种可能会激增并成为一个入侵物种。
Biologists can infer how species are related evolutionarily by comparing DNA sequences for the same genes in different species.
生物学家可以通过比较不同物种中相同基因的DNA序列来推断物种之间的进化关系。
Meteorite impacts can be advantageous for some species, which thrive, and disastrous for other species, which become extinct.
陨石的撞击对某些物种是有利的，它们会茁壮成长；而对其他物种则是灾难性的，它们会灭绝。
If more than one species is competing for a scarce resource, the competing species usually switch to different alternative resources.
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。
应用推荐