树冠层

在哥斯大黎加森林树冠层下方30公尺处

Here , 30 metres beneath the Costa Rican forest canopy ,

一些科学家认为单单是树冠层就容纳着世界上一半的物种！

Some scientists believe this canopy alone may contain half of the world 's species !

调查结果还表明，防霜效果与林带的走向、迎霜和背霜面、树冠层大小等有关。

The investigation further showed that frost prevention effect was related to forest belt direction , wind direction and tree crown size .

结果表明，在树冠层，随高度升高，太阳总辐射、净辐射增加，地面反射辐射减小。

The results showed that the solar total radiation and the net radiation increased with the height , but the reflecting radiation decreased .

动物界适应性的一个绝佳例子是飞行。猴子选择在树冠层上悬荡和跳跃，有的动物选择更简单的方法——飞行。

A classic example of an adaptation ? Flight . While monkeys choose to swing and jump across the vast canopies , some animals take a simpler approach - flight .

因此断定：树冠西南方位外围叶片最易遭受高温和强光胁迫。5.在不同季节，树体冠层特性、叶片的光合性能以及抗氧化特性有很大的差异。

Thus , it was refered that the exterior canopy on southwest exposure was where leaves most easily suffered from high temperature and intense light stresses . 5 . The tree canopy characteristics , photosynthetic rates and antioxidant properties varied with different seasons .

很多树高达150英尺，树冠层有80英尺厚。

Many of the trees are 150 feet tall , with canopies exceeding 80 feet .