Deciduous trees are shedding their leaves.

落叶乔木的树叶开始掉落。

The deciduous trees pre-empted the winter by shedding their leaves.

落叶乔木通过脱落树叶率先应对冬天。

So each fall, deciduous trees recycle their leaves before dropping them.

所以每年秋天，落叶树会在叶子落下前进行营养回收。

Here at the very south of the Taiga, deciduous trees take over from evergreens.

这里是泰加林的最南端，落叶树木取代了常绿树木。

They eat leaves, twigs, and the inner bark of deciduous trees, as well as shrubs, aquatic plants, and grasses.

它们吃叶子，嫩枝和落叶性树木的内层树皮，还有灌木、水生植物、草等。

So after a severe fire, the environment is better suited for deciduous tree species like birch and aspen to get a foothold.

因此在严重火灾后，森林环境更适合桦树和山杨等阔叶树立足。

Deciduous trees are trees like, maple, or oak, or poplar.

落叶树是像枫树、橡树或杨树这样的树。

Deciduous trees are set to dominate the Interior Alaskan forests by the end of this century.

到本世纪末，落叶树将主宰阿拉斯加内陆森林。

So there's really two kinds of trees that you'll find in the forest. There's deciduous trees.

所以你会在森林里找到两种树。有落叶树。

Most carbon would be in the trees themselves, since deciduous trees gobble up soil nutrients as they grow rapidly.

大多数碳都存在于树木本身中，因为落叶树在快速生长时会吞噬土壤养分。

They knew that deciduous trees—such as birch and aspen— tended to sprout up in the embers of burned-out coniferous spruces.

他们知道落叶树——如白桦和白杨——往往会在烧毁的针叶云杉的余烬中发芽。

So after a severe fire, the environment is better suited for deciduous tree species like birch and aspen to get a foothold. These trees grow much faster.

所以在一场严重的火灾之后，环境更适合像桦树和白杨这样的落叶树种找到立足点。 这些树长得更快。

The first are called deciduous trees which are any tree that seasonally shed all their leaves, usually in the fall as the weather starts to get colder.

第一种被称为落叶树，是指季节性脱落所有树叶的树木，通常是在秋天天气开始变冷的时候。

Collectively, there's less sunlight for plants to harvest using the chlorophyll in their leaves, so deciduous trees begin to pull back their investment in keeping them alive.

总的来说，植物通过叶绿素从阳光中获取能量的机会减少了，因此落叶树木开始减少生产叶绿素，以保持其生命力。

Since deciduous trees have big leafs that take lots of energy to maintain, they simply close up the holes where the leaves attach to the tree to conserve moisture.

由于落叶树的叶子很大，需要大量的能量来维持，所以它们会把叶子和树连接的孔封闭起来以保存水分。

Deciduous trees like birch and aspen live for about 100 years, so the team couldn't simply wait for one or two centuries to find out what happens in the forest.

像桦树和白杨这样的阔叶树的寿命约为100年，所以研究小组不能只是等上一两个世纪来发现森林里发生了什么。

The benefits of temperature regulation can also be found in deciduous trees, which offer passive solar shading in summer, while allowing the sun's rays penetrate deep into a building's floor plan during winter months.

温度调节的好处也可以在落叶乔木找到，它们在夏天提供被动遮阳，在冬季让阳光穿透到建筑的平面。

That's actually part of a process known as abscission, where most deciduous trees shed their leaves after their colors change from a loss of chlorophyll, the chemical that's involved in photosynthesis.

这实际上是称为脱落的过程的一部分，大多数落叶树在颜色因叶绿素损失而改变后脱落，叶绿素是参与光合作用的化学物质。

In the end, these exquisite gold and russet displays help deciduous trees recover as much as 50% of the nitrogen and phosphorus from their old leaves to help grow fresh new green ones in the spring.

最终，这些美丽的金色和黄褐色树叶帮助落叶乔木回收了老叶中多达 50% 的氮和磷，令大树可以在新春中焕发新绿。