In the last several decades, due to destruction of habitat and hunting pressure, the distribution range and population size of this muntjac have been continued declining.
近几十年来，由于栖息地受到严重破坏，以及滥捕猎杀等原因，黑麂野生种群的分布范围和数量逐渐缩小。
The size structure and distribution pattern of Picea mongolica population on sand dune and their rerlationship to eco-environment are studied by size structure in place of age structure.
本文用种群大小结构代替年龄结构研究了沙地云杉种群的大小结构、分布格局和动态规律。
Accordingly some scholars suggested revising the functional positioning of the core of downtown areas and readjusting the speed and size of population re-distribution.
针对这种状况，学者们提出了一些建议，如修正中心城区核心部分功能定位，调整人口再分布速度规模等。
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