The emphasis of this new "community ecology" was on the composition and structure of communities consisting of different species.

这种新的“群落生态学”强调的是由不同物种组成的群落的组成和结构。

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The complex interplay of species in symbiotic relationships highlights an important point about communities: Their structure depends on a web of diverse connections among organisms.

物种在共生关系中复杂的相互作用突出了群落的一个重要特点：它们的结构取决于生物之间多样的联系网络。

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Long-term effects are primarily mediated by changes in tree species composition and the consequent alterations of forest structure, productivity, and nutrient uptake.

长期影响主要是由树种组成的变化以及随之而来的森林结构、生产力和养分吸收的变化所导致的。

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Several different species of coral can be present in the different colonies that form the reef structure.

VOA: special.2010.08.10

His team used a method called transient gene silencing to change the genetic structure of the three mosquito species responsible for spreading malaria.

VOA: special.2010.04.20

They will record plant species, forest structure, ash cover, soil properties, river sediment and the overall topography of the burned area.

ECONOMIST: A 30-year plan to study America��s ecology is about to begin

The principle would work, he says, for any species with a genetic structure to its population.

ECONOMIST: DNA tracking

As a result, scientists know almost nothing about the species' habits or social structure.

MSN: Found: Whale thought extinct for 2 million years