key to species的意思|示意

Such species may be key to the survival of their small ecosystem and their loss, even among many related species, can alter an entire ecosystem.

这些物种在其所处的小型生态系统中可能发挥着关键性的作用，一旦消失，即使还有许多相关的物种，也会导致整个生态系统发生改变。

Water is usually considered to be the key limiting factor for growth of desert plants, yet there is little information available of the water use efficiency of species within a desert community.

水分通常是影响荒漠植物生长的主要限制因子，然而当前很少有关于荒漠群落中植物水分利用效率的报道。

A tabular key is provided to facilitate species identification in the group of lack of a distinctly offset, rounded oesophageal bulb in this genus.

提供了一个表格式检索表，以助鉴定和比较该属缺乏明显界定食道后球的一个种组。

Perhaps we should give special attention to the conservation of such plant species since they lack key factors in their defenses against the environmental disruption caused by pesticide use.

也许我们应该特别注意保护这类植物，因为它们缺乏关键的因素来抵御由使用杀虫剂而造成的环境破坏。

Two new records of ciidae associated with stored products were morphologically described in the paper and a key to the species found in China was presented.

本文对木蕈甲科仓虫两新纪录种的形态进行了报道，并提出了已知木蕈甲科仓虫检索表。

The division of site type and selection of resistant species are key techniques to afforestation of matching trees with site conditions in semiarid sand area.

立地类型划分与抗逆树种选择是半干旱风沙区适地适树造林的技术关键。