species concept

At the same time, with the large sapling forest ecosystem is for the research object, bring up the concept of key species that with related the degree of harm sapling, and the calculation formula of key species index and distinguish the standard.

同时，以幼林生态系统为研究对象，提出了与林木危害程度相关的群落关键种的概念以及关键种指数的计算公式和判别标准。

Species is the basic unit of the taxonomy, but also the basis and evolutionary biology core concept.

物种是分类学的基本单位，而且也是进化生物学的基础和核心概念。

More for the foreign species on the concept of TV entertainment critique of mass culture.

国外较多为对电视娱乐节目的种概念大众文化的批判。

By the the history of Wildlife Tourism, the concept of modern Wildlife Tourism, and the situation of wildlife park development in China, from the point of the wildlife species conversation and the existence appearance, try to advanced the criterion of Safari Park ranking system.

通过对野生动物观赏的历史沿革，现代野生动物旅游业理念，我国野生动物园的发展现状的论述，从野生动物物种保护和生存状态角度，尝试提出野生动物园等级划分的标准。

I mean that cross-species breeding is a ridiculous concept.

我是说不同种类之间交往是个荒谬的概念.

This is a striking example of the biological concept of symbiosis, in which two or more unrelated species have co-evolved and now depend on each other for survival.

这是生物概念共生现象的惊人例子，在这个例子中两种或更多无关品种植物共同进化并且为了生存互相依赖。

The concept of invasive alien plants ( IAP ) that belongs to invasive alien species.

外来植物入侵属于生物入侵的范畴,对生态、环境和生物多样性具有破坏性影响.