In contrast, when a single species is dominant, it can cause problems.

相反，当单一物种占优势时，就会造成问题。

One type only attracts male bees from a single species.

一种兰花只会吸引某个品种的雄蜂。

And imagine that the forest was made up of a single species.

整片雨林都是由一棵棵树组成。

Never before has a single species determined the future of the entire biosphere.

以前从来没有一个物种能够决定整个生物圈的未来。

The extinction of a single tree species could mean the loss of many others.

一个树种的灭绝可能意味着许多其他事物的消失。

Phytoplankton is one of the biggest resources for food for every single species in the ocean.

海洋生物主要以浮游植物为食。

We want to investigate, but we should count every single species along the shoreline.

我们想调查，我们应该统计海岸线上的每一个物种。

Which makes sense, trees of a single species all have the same approaches to getting light, nutrients, and water.

这是有道理的，单一物种的树木都有相同的方法来获得光线、养分和水。

And by studying these types of population changes, population ecologists can learn things that go beyond a single species.

通过研究这些类型的种群变化，种群生态学家可以了解到超越单一物种的东西。

MARSHALL: I was talking to people about, you know, these diving destinations that revolve around a single species.

我和人们谈论过，这些潜水胜地都围绕着一个物种。

To keep things consistent, he looked at the fate of a single tree species, the marula, in all three zones.

为了保持一致，他观察的是三个区域中同一种树木的命运—马鲁拉树。

Typically, a phage will only infect a single bacterial species.

通常， 噬菌体只会感染一种细菌。

Dinosaurs evolve from a single common ancestor species.

恐龙是从一个共同的祖先物种进化而来的。

How can a single species be so abundant across so many different habitats?

一个物种怎么能在这么多不同的栖息地中如此丰富？

It's a monoculture of one single tree species planted for rapid tree growth.

它是为树木快速生长而种植的单一树种的单一栽培。

Or are we seeing instead a single species that's changing across time as the environment changes and as the animals change.

还是我们看到的是一个物种在历史上的不同阶段随着环境的变化自身产生的变化。

The death of a single crop species might not seem so important.

单一作物物种的死亡似乎并不那么重要。

This essentially states that organisms which all look the same are considered a single species.

这基本上表明，看起来都一样的生物被认为是单一物种。

This means the Miocene graveyard couldn't have been caused by the behavior of a single species.

这意味着中新世墓地不可能是由单一物种的行为造成的。

And when they lined up all the fossils, they looked like a single species growing to maturity.

当他们将所有化石排成一排时，它们看起来像是一个正在成熟的单一物种。