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。

Learning to identify these sentence patterns is much like learning to identify different tree species.

学习识别这些句型很像学习识别不同的树木种类。

For thousands of years, it was the most abundant tree species across the eastern deciduous forest.

千百年来，它曾是东部落叶林中数量最多的树种。

That interdependence of the forest and its constituent tree species, ground flora, and fauna is taken for granted.

森林、树种、地面植物、动物这些组成森林的因素之间相互依赖，是理所当然。

And in fact...if another tree species were to grow here, it too would enjoy the same advantages.

事实上，如果另一种树也长在这里，同样可以享受到这个优势带来的好处。

More than half of the tree species and 92 percent of the amphibians live nowhere else on earth.

超过一半的树种和百分之的两栖动物在地球上再无别处可居。

We know that each of these tree species has a highly specialised set of herbivores which attack it.

我们知道，每一种树都有自己特殊的机制防止植食动物的侵害。

Partly we know which fungi are where because we have been using tree species as proxies.

我们知道某些真菌在哪里，是因为我们一直把树种当做替代物。

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。

The research team estimated that South America has about 27,000 known tree species and 4,000 yet to be identified.

该研究小组估计，南美洲大约有2。7万个已知树种，以及4000种尚未确认的树种。

It noted that island tree species are more at risk than other trees.

该报告指出，岛上的树种比其他树种面临的风险更大。

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。

At least 180 tree species are directly threatened by rising seas and severe weather, the report added.

该报告补充说，至少有180个树种受到海平面上升和恶劣天气的直接威胁。

The Blue Ridge Mountains are home to at least 150 native tree species.

蓝岭山脉拥有至少 150 种本土树种。

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。

One possible solution would be to cut down less important tree species because other plants compete with the sequoias for water.

其中一个可能的解决方法是砍伐不那么重要的树种，因为其他树木与红杉树竞争水资源。

This then allows the forester to decide which tree species are regenerated.

然后，林务员就可以决定再生哪些树种。

Maybe you've never heard of the gutta percha, a tropical tree species that provided the sap used to make gutty balls.

也许你从未听说过 gutta percha ，这是一种热带树种，它的汁液可以用来制作 gutty 球。

[Joe] A changing climate could even lead to a very different mix of tree species in these forests.

- [Joe] 气候变化甚至可能导致这些森林中树种的混合非常不同。

The interdependence of the forest and its constituent tree species, ground flora, and fauna is taken for granted.

森林及其组成树种、地面植物群和动物群的相互依存关系被认为是理所当然的。