Toucans are found in South and Central America in the canopy layer of the rainforest.

巨嘴鸟在雨林的天篷层的南方和中美洲被发现。

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Using observational data of the turbulent gradient, exchange characteristics of the momentum in the plant canopy layer (CL) are studied in detail.

使用湍流梯度测试资料，对植物冠层动量交换特征进行了详细研究，结果表明；

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And when individual trees die due to lightning, insects, fungal attack or other causes, there is generally a second canopy layer waiting in the shade to take over and maintain productivity.

当个别树木死亡由于雷击，昆虫，真菌攻击或其他原因，但一般是第二冠层等候在阴凉处接管和维持生产力。

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Odzala is characterized by a rich variety of habitats, including primary rain forest with a closed canopy (e.g. with Entandrophragma utile, E. candollei and E. cylindricum) and open understorey layer, forests dominated by dense formations of Marantaceae, forest clearings and savannas on the hilltops (e.g. with Hymenocardia acida, Annona arenaria or Hyparrhenia diplandra).

UNESCO: Biosphere Reserve Information