Black spruce and fir are the dominant tree species in the boreal forest.

黑云杉和冷杉是北方森林的优势树种。

Humans, now the dominant species, will either lead the biosphere towards a flourishing future or to catastrophe.

人类——现在处于主导地位的物种，要么引领生物圈走向繁荣的未来，要么走向灾难。

120 million years ago, dinosaurs were the planet's dominant species, but when conditions changed, their size and power couldn't help them.

一亿两千万年前，恐龙是地球的主宰性物种，不过当条件改变时，它们的体型和力量也帮不了它们。

And, without proof of life anywhere else in the universe, we can probably consider ourselves the most dominant species in space too.

如果宇宙其他地方没有生命存在的证据，人类很可能会认为自己在宇宙中也占据主导地位。

The Anthropocene Age had begun - an epoch defined by one dominant species.

人类世时代已经开始— —一个由一个优势物种定义的时代。

Things are supposed to be food for other things, so they compete with our native animals and because they're a more dominant species they win that battle.

这些（小型哺乳动物）本应是其他动物的食物，它们与我们的本土动物竞争，因为它们是一个更具优势的物种，所以它们赢得了这场战斗。

Humans, the most dominant species to walk the Earth, have transformed environments around the world, subverting billions of years of meticulous evolution.

人类是行走地球的最主要物种，它改变了世界各地的环境，颠覆了数十亿年的精心进化。

Microbiomes and the services they provide could cope not just by evolving, but also by shifting around the dominant species of microbes.

微生物组及其提供的服务不仅可以通过进化来应对，还可以通过改变微生物的优势物种来应对。

But on the other hand, it would essentially establish a new dominant species in the ecological community — one that the local plants and animals had not evolved to live with.

但另一方面，它将在生态群落中建立一个新的优势物种——一个当地植物和动物没有进化到可以与之共存的物种。

There were some changes in the dominant species, but mountaintop microbes decomposed dead grass just as well as desert microbiomes in the hot, dry climate.

优势物种发生了一些变化，但山顶微生物在炎热干燥的气候中分解枯草以及沙漠微生物群落。

In fact, the rise of humanity, thousands of years ago, started the first geological epoch dictated not by the evolution of the natural world… but by a single, globally dominant species.

事实上，几千年前人类的兴起开启了第一个地质时代，它不是由自然界的进化决定的… … 而是由单一的、全球主导的物种决定的。

We have evidence of this, in the facts stated in the second chapter, showing that it is the common and diffused or dominant species which offer the greatest number of recorded varieties.

在第二章所述的事实中， 我们有这方面的证据，表明提供最多记录变种的是常见的和扩散的或优势的物种。

Dominant species belonging to the larger groups within each class tend to give birth to new and dominant forms; so that each large group tends to become still larger, and at the same time more divergent in character.

属于每个类别中较大群体的优势物种往往会产生新的优势形式；因此，每个大群体往往会变得更大， 同时在性格上也更加分歧。

Lastly, and this I am inclined to think is the most important element, a dominant species, which has already beaten many competitors in its own home, will tend to spread and supplant many others.

最后，我倾向于认为这是最重要的因素， 一个优势物种， 已经在自己的家乡击败了许多竞争对手， 将倾向于传播和取代许多其他竞争对手。