其群落的植物种类组成和种群特性，随着土壤水、盐状况的改变而有较明显的差异。
In saline meadows. the floristic composition and the population character of A. sparsifolia varies with the changes in soil water and salt conditions.
地理上的隔离是隔离种群所必需的条件，且地理隔离的性质完全取决于生物体的生物学特性及其分散的可能性。
The nature of the geographic separation necessary to isolate populations depends entirely on the biology of the organism and its potential for dispersal.
如果是有利的，这种灵活性可以被传递给后代，这样就可以导致种群中新特性的进化。
If beneficial, this flexibility could be passed on to offspring and so can lead to the evolution of new features in a species.
这种植物种群数量的“大爆炸”是在古代植物染色体组加倍时发生的。染色体组加倍给植物提供了大量具有新功能的基因，这些新基因又形成了新特性。
These "big bangs" in plant evolution occurred when the genomes of ancient plants duplicated, providing vast Numbers of new genes that could take on new functions and lead to new traits.
研究表明不同地理种群的褐飞虱的致害性与其为害特性并不完全一致。
These results indicate that difference in virulence and damage characteristics could be found in different geographical populations of BPH.
远缘杂交是许多天然植物种群的一个显著特性，其结果往往是通过多倍体化或者在二倍体水平上形成新物种。
Hybridization is a prominent feature of natural plant populations, and one that often leads to speciation, either through polyploidization or at the diploid level.
本研究对蠡湖鲢鳙鱼的种群结构及其生长特性进行了调查，旨在为保护和科学利用其渔业资源提供依据。
This study was mainly about the growth characteristics and community structure which will provide evidence for protection and utilization of fishery resources in Lihu lake.
介绍了鸢尾科植物的种群分布，各个品种的生长特征，观赏特性以及它们在园林绿化、水土保持中的应用。
It introduces the distribution of iridaceous plants, the growing feature of every variety, and the seeing and enjoying specific.
在适宜情况下周期短，这些特性使他们的种群数量在相当短的时间内能达到较大的密度。
In appropriate circumstances cycle is short, these properties that make their populations in a relatively short time to the density of the larger internal energy.
他发现，就在一个生长季节里，这种草在历经了几次考验之后，它的种群又扩大了，只是物理特性发生一些改变，以适应人们的这种新措施。
He found in a series of trials that populations of the familiar weed evolve changing physically to take advantage of this sort of resource enhancement within the space of one growing season.
应用优化算法高度并行、种群个体收敛高度一致的特性，较好的解决了高维统计计算中样本数量与计算时间、样本数量与样本质量之间难以协调的问题。
The problems of harmony between sample number and calculation time, as well as between sample number and sample quality in higher order statistics calculation were achieved.
在构建模型之前， 需要充分了解入侵物种的生物学特性、种群平衡状态、本土地理分布范围及物种的生物历史地理等方面的知识。
We conclude that the knowledge of the biology, population equilibrium state, geographic distribution, and biogeographic history of the invasive species is crucial prior to niche modeling.
在构建模型之前， 需要充分了解入侵物种的生物学特性、种群平衡状态、本土地理分布范围及物种的生物历史地理等方面的知识。
We conclude that the knowledge of the biology, population equilibrium state, geographic distribution, and biogeographic history of the invasive species is crucial prior to niche modeling.
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