干旱区生态环境知识资源中心(Arid): 敦煌绿洲不同生境胡杨种群结构与空间格局研究

Arid

	敦煌绿洲不同生境胡杨种群结构与空间格局研究
其他题名	Structure and spatial distribution patterns of Populus euphratica populations from different habitats in the Dunhuang Oasis
	刘普幸; 鹿晨昱; 姚晓军; 曹立国
来源期刊	北京林业大学学报
ISSN	1000-1522
出版年	2011
卷号	33 期号:2 页码:48-52
中文摘要	在敦煌绿洲天然胡杨林内设置5个样地(共计6.25 hm~2), 应用相邻格子法, 进行每木调查, 结合7种聚集度指标, 研究了不同生境胡杨种群的年龄结构与空间分布格局. 结果表明:研究区幼苗缺失, 幼树极少, 年龄结构大体呈倒金字塔型, 为衰退种群;林分偏老, 十分稀疏矮小. 不同生境胡杨种群年龄结构差异显著, 其中后坑胡杨种群的年龄结构最不完整, 衰退演替速度最快. 除大马迷兔外, 研究区胡杨表现为聚集分布, 这与其自身的生理生态学特性及地形、水资源、气候、土壤等异质性生境密不可分
英文摘要	In order to investigate the age structure and spatial distribution patterns of Populus euphratica populations in different habitats, five plots, totally 6.25 hm2, were established in the Dunhuang Oasis, western China.Seven aggregation indices were measured using a contiguous quadrat method and tally inventory.The results indicated that the study area was short of saplings, and juveniles were scarce, resulting in an inverse pyramidal age structure of P.euphratica populations and showing a trend of declining populations.The P.euphratica stands were aged, sparse and dwarfish.The age structure of P. euphratica populations varied remarkably among different habitats, among which, that of HK population was the most incomplete with the rapidest declining succession.In general, the spatial distribution of P. euphratica populations conformed to a clumped distribution pattern except for the DMMT population.The age structure and the spatial distribution pattern of P.euphratica populations were closely related to biological and ecological characteristics of the species and the heterogeneous environmental factors such as landform, water resources, climate and soil
中文关键词	敦煌绿洲 ; 胡杨 ; 种群结构 ; 空间分布格局 ; 聚集强度
英文关键词	Dunhuang Oasis Populus euphratica population structure spatial distribution pattern aggregation intensity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:4172355
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226161
作者单位	西北师范大学地理与环境科学学院
推荐引用方式 GB/T 7714	刘普幸,鹿晨昱,姚晓军,等. 敦煌绿洲不同生境胡杨种群结构与空间格局研究[J]. 西北师范大学,2011,33(2):48-52.
APA	刘普幸,鹿晨昱,姚晓军,&曹立国.(2011).敦煌绿洲不同生境胡杨种群结构与空间格局研究.北京林业大学学报,33(2),48-52.
MLA	刘普幸,et al."敦煌绿洲不同生境胡杨种群结构与空间格局研究".北京林业大学学报 33.2(2011):48-52.