中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 沙埋对西鄂尔多斯高原灌木群落格局的影响 北京林业大学学报 2010,32 (4) 26-33
Position: Home > Articles > Impact of sand burial on spatial patterns of shrub communities on the western Ordos Plateau,northwestern China Journal of Beijing Forestry University 2010,32 (4) 26-33

沙埋对西鄂尔多斯高原灌木群落格局的影响

作  者：
王彦阁;杨晓晖;慈龙骏
单  位：
国家林业局林木培育重点实验室;中国林业科学研究院林业研究所
关键词：
灌木群落;沙埋;空间格局分析;最近距离;干旱半干旱区
摘  要：
西鄂尔多斯高原集中分布了很多珍稀濒危灌木物种,近年来遭遇了不同程度的沙埋,为了揭示沙埋对该区灌木群落的影响,采用2006年西鄂尔多斯高原干旱荒漠灌木群落的空间点格局调查数据,运用基于最近邻体距离的空间格局指数F函数、G函数和J函数,研究了不同沙埋程度干扰下灌木群落的结构和空间格局。结果表明:沙埋是该区不耐沙灌木消亡的重要影响因素,随地表覆沙厚度的增加,群落内不耐沙灌木的数量逐渐减少;对于耐沙灌木,浅层的覆沙有利于其更新生长,而当覆沙厚度超过一定值时,这种正向作用转为负向作用,导致耐沙灌木由数量上的增加转为减少;不耐沙灌木和耐沙灌木在不同沙埋强度的影响下,在小尺度上都表现为显著的随机分布,而二者之间在浅层的沙埋干扰下,在小尺度上有较显著的负相关关系,当覆沙厚度达12cm时,群落内灌木分布极稀疏,也没有显著的相关关系。沙埋导致群落内物种单一且有老龄化现象,更新困难,是群落退化的重要驱动力。
译  名：
Impact of sand burial on spatial patterns of shrub communities on the western Ordos Plateau,northwestern China
作  者：
WANG Yan-ge;YANG Xiao-hui;CI Long-jun Research Institute of Forestry,Chinese Academy of Forestry,Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration,Beijing,100091,P.R.China.
关键词：
shrub community;sand burial;spatial pattern analysis;nearest neighbor distance;arid and semi-arid areas
摘  要：
The western Ordos Plateau is a distribution center of many endangered shrub species,which have suffered sand burial to various degrees during the last few years.According to the survey data of spatial point pattern of shrub communities in the arid desert of western Ordos Plateau in 2006,we investigated the structure and spatial pattern of shrub communities under different levels of sand burial to reveal its effects on shrub communities in this area.Three indices of spatial pattern based on the nearest neighbor distance,i.e.the F(t),G(t) and J(t) functions,were selected.The results indicate that sand burial is an important factor causing the extinction of sand intolerant shrubs.The number of sand intolerant shrubs gradually reduced with an increase in the depth of sand burial.For sand tolerant shrubs,shallow sand burial promoted their germination and growth,but this positive role changed to a negative effect when the depth of sand burial exceeded a specific value,showing at first an increase in the number of sand tolerant shrubs and then a decrease.Both sand tolerant and intolerant shrubs showed a random distribution pattern on a small scale under various levels of sand burial,with a significantly negative correlation under shallow sand burial.When the depth of sand burial exceeded 12 cm,the shrubs appeared to be sparsely distributed and without any significant correlation.Sand burial is an important driving force in community degradation,which tends to cause the singleness and aging of shrub species in the community and difficulty to regenerate.

相似文章

导出引用
计量
文章访问数: 10
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46