Natural ecosystems usually have more complicated food chains, however.

大自然生物圈中有很多更复杂的食物链。

Human activity can also damage the balance of of natural ecosystems.

人类的活动也能够对自然的生态系统的平衡做出影响。

" A world without herbivores would be a disaster for any natural ecosystem" .

" 一个没有食草动物的世界对于任何自然生态系统来说都是一场灾难。"

But even smaller asteroids could have a significant impact on both natural and human ecosystems too.

但即使再小的行星也会对自然和人类生态系统产生巨大的影响。

It mimics natural ecosystems in order to help feed the world's population with fewer environmental impacts.

通过模仿自然界的生态系统，该耕种方式有望喂饱世界人口，但却又不会对大自然造成很大的影响。

We don't need to destroy any more natural ecosystems.

我们不需要再破坏任何自然生态系统。

Incredibly, the O'Neill Cylinder was designed to support a thriving natural ecosystem.

令人难以置信的是，O'Neill Cylinder 的设计旨在支持繁荣的自然生态系统。

What would be the impact on natural ecosystems that are important to this country.

对这个国家很重要的自然生态系统会产生什么影响。

Plants in many natural ecosystems need help to have sex.

在很多自然生态系统中，植物都需要帮助才能繁殖。

She said in a statement that life in space would require a " natural ecosystem" to support humans and their necessary equipment.

她在一份声明中说，太空生活需要一个“自然生态系统”来支持人类及其必要的设备。

But rarely do we couple that with the other ecosystem services that these natural ecosystems are providing.

但我们很少将其与这些自然生态系统提供的其他生态系统服务结合起来。

But a number of scientists question the assumption that the presence of alien species can never be acceptable in a natural ecosystem.

这一观点却受到了很多科学家的质疑，他们对这些外来物种永远也不会融入当地自然生态系统这一看法持怀疑态度。

Just like the interdependent species that make up natural ecosystems, we humans are deeply dependent on one another.

就像构成自然生态系统的相互依存的物种一样，我们人类也深深地相互依赖。

As conservationists remove red-eared sliders from natural ecosystems, researchers like Pauly can study them as proxies for native species.

随着自然保护主义者从自然生态系统中移除红耳滑块，Pauly 等研究人员可以将它们作为本地物种的代理进行研究。

Still, the less plastic we use, and the more we understand the consequences, the better we can protect ourselves and our planet's natural ecosystems.

所以如果我们减少使用塑料，更了解白色污染的后果，那么就能更好地保护我们自己，也保护了自然生态系统。

At its core, the debate is about how to manage the world's remaining natural ecosystems and about how, and how much, to restore other habitats.

这场辩论的核心是如何管理世界上现存的自然生态系统，如何以及多大程度上恢复其它栖息地。

Large herbivores are highly important, especially in places like forests, Galetti said. " A world without herbivores would be a disaster for any natural ecosystem" .

加莱蒂称，大型食草动物非常重要，尤其是在森林中。" 对于任何自然生态系统来说没有食草动物都是一场灾难。"

That people will be a little bit more thoughtful about the way we live our lives and about the way we interact with these natural ecosystems.

人们会更加关注我们的生活方式以及我们与这些自然生态系统的互动方式。

60% gets incinerated or goes into the landfills, and 30% leaks out into the environment where it will pollute natural ecosystems for centuries.

60% 被焚烧或进入垃圾填埋场，30% 泄漏到环境中，将污染自然生态系统几个世纪。

Of course, like every other environmental issue today, this is playing out against the background of global warming and human interference with natural ecosystems.

当然，就像今天的所有其他环境问题一样，这是在全球变暖和人类对自然生态系统的干扰的背景下发生的。