Animal experts in Vietnam are using the eDNA to find the last, wild Yangtze giant softshell turtles.

越南动物专家使用eDNA来寻找最后的野生斑鳖。

In Yosemite, researchers used eDNA to track and remove invasive bullfrogs.

在优胜美地国家公园，研究者用环境 DNA 来追踪和清除入侵的牛蛙物种。

Using eDNA, scientists are able to investigate complex ecosystem interactions.

通过使用环境 DNA，科学家们能够调查复杂的生态系统之间的相互作用。

For the study, researchers examined environmental DNA, also known as eDNA, from soil samples.

在这项研究中，研究人员检查了土壤样本中的环境DNA，也被称为eDNA。

But until recently, eDNA wasn't very useful to us.

但是环境 DNA 直到最近方为我们所用。

Without seeing the cat, scientists had proof it was there because of environmental DNA or eDNA.

在没有肉眼观测到其出现的情况下，科学家们仍能断定它的存在，归功于环境 DNA，也就是 eDNA。

Scientists have also used eDNA sampling as a tool to study sea life like whales and sharks.

科学家还将eDNA水样作为研究鲸鱼和鲨鱼等海洋生物的工具。

Laura Epp, who was not involved in the study, is an eDNA expert at Germany's University of Konstanz.

劳拉·埃普没有参与这项研究，她是德国康斯坦茨大学的环境DNA专家。

So in many contexts, eDNA is useful for telling us about the recent past.

因此，在多数情况下，环境 DNA 对我们了解近期活动起到十分重要的作用。

Well, this edna has got to be stopped.

我们要阻止这个爱德娜。

Fortunately, eDNA and metabarcoding give us the tools to document rapid change in real time.

幸运的是，eDNA 和元条形码为我们提供了实时记录快速变化的工具。

What about them? -no way. they're all friends of edna's.

她们呢 -不行 她们都是爱德娜的朋友。

But here on Earth, science fiction is becoming reality through a new sampling technology called environmental DNA, or eDNA for short.

但在地球上，通过名为环境DNA(或eDNA)的新样本技术，科幻小说正在成为现实。

Caren Goldberg sees eDNA as a way to get answers more efficiently, safely and with less destruction compared to traditional survey techniques.

卡伦·戈德堡认为与传统调查技术相比，eDNA是更有效、安全和破坏性更小的寻找方法。

But given that eDNA is literally blowing around ecosystems, the researchers wondered if it might be collecting on leaves.

但考虑到 eDNA 确实在生态系统中传播，研究人员想知道它是否可能聚集在叶子上。

With eDNA, they also found that less nutritious grasses colonized the Arctic steppe during the last ice age, potentially contributing to the mammoth decline.

通过环境 DNA，研究者还发现那些缺乏营养价值的草在最后一个冰河时期内于北极草原上肆意生长，极可能加速了长毛象种群数量的减少。

But in the case of one species, the Greenland shark, the eDNA method may actually have done a better job than trawling.

但就格陵兰鲨鱼这一物种而言，eDNA 方法实际上可能比拖网捕鱼做得更好。

In recent years gene-sequencing technology has become quick and sensitive enough to pick out genetic sequences from particular animals—including humans—from this ubiquitous eDNA.

近年来，基因测序技术已经变得足够快速和灵敏，足以从这种无处不在的 eDNA 中挑选出特定动物（包括人类）的基因序列。

If studying eDNA in turtles—or any other organism—necessarily involves gathering human genetic information too, ecologists will have to be more careful with their data.

如果研究海龟或任何其他生物体的 eDNA 也必然涉及收集人类遗传信息，那么生态学家将不得不更加谨慎地处理他们的数据。

Mostly, because eDNA sequencing is much less invasive than trawling, these scientists think it’s a promising option for future fish studies, even though it still needs some refining.

大多数情况下， 由于 eDNA 测序比拖网捕鱼的侵入性小得多，这些科学家认为它是未来鱼类研究的一个有前途的选择， 尽管它仍然需要一些改进。