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1·There is usually a good deal of turnover in species composition, even in a mature community.

即使在一个成熟的群落中，物种组成通常也有很大的变化。

2·Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly.

实验表明，如果美洲稀树大草原没有发生火灾，物种组成将发生显著变化。

3·Shifts in forest species composition ramify through the ecosystem in many ways because tree species have different, often unique properties.

由于树种具有不同的、往往是独特的特性，森林物种组成的变化以多种方式影响着生态系统。

4·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。

5·The species composition of ticks varied with different months.

不同月份的蜱种组成有所不同。

6·Water colors have a close connection with phytoplankton species composition.

水色与浮游植物种类组成密切相关。

7·Species richness and evenness were unrelated to similarity in species composition.

物种丰富度和均匀度均与物种构成上的相似性没有显著相关关系。

8·As a result, the species composition of crow flocks wintering in Shenyang City is c.

发现冬季集群于沈阳市郊的乌鸦主要由小嘴乌鸦C。

9·The species composition, variation in biomass and their succession were investigated.

分析了水库水生生物种类组成、数量变化和群落演替。

10·Similarity of forest community species composition of herb layer did not change evidently.

草本层物种组成的相似性随海拔上升无明显变化趋势。