%0 Journal Article
%T Variation of competition intensity across a chronosequence in surface firemediated Mongolian pine forest<br>地表火干扰时间序列上樟子松林竞争强度的变化
%A YU Hong
%A YANG Xiaohui Research Institute of Forestry
%A Chinese Academy of Forestry
%A Key Laboratory of Tree Breeding
%A Cultivation
%A State Forestry Administration
%A Beijing
%A China
%A <br>喻泓
%A 杨晓晖
%J 生态学报
%D 2010
%I 
%X Fire is a crucial disturbance factor in Mongolian pine forest. Under the approach of space for time substitution, competition intensities of trees were explored using the long tradition of distance-dependent competition index in two 1-hm2 fully mapped plots of Mongolian pine forest across a chronosequence of different intervals of time-since-fire, in Hulun Buir sand region, Inner Mongolia, China. Recruits were also estimated using the geostatistics method of kriging in a-1994-burned stand (B94). Our results show that (1) competition intensities of survival components were all significantly lower than those of pre-mortality agents; (2) competition intensities of survival components in B94 were significantly lower than those of corresponding components in B06 (a 2006-burned stand); (3) most recruits inhabited in the gaps triggered by surface fire in B94. Thus, competition intensity would decrease continuously and significantly across the chronosequence. The survival components may have more resources and space to live on due to the diminishments of competition intensities of stems, which are driven by surface fire, a dynamic driving force in the developing process of Mongolian pine forest.
%K chronosequence
%K competition index
%K geostatistics
%K Mongolian pine
%K stand component
%K surface fire<br>时间序列
%K 单木竞争指数
%K 地统计
%K 樟子松
%K 林分组分
%K 地表火
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=9E0DDB306FEDBC22EF039E3F4AC33D88&yid=140ECF96957D60B2&vid=340AC2BF8E7AB4FD&iid=CA4FD0336C81A37A&sid=9C65ADEB5990B252&eid=CD775AE9DDBD7B53&journal_id=1000-0933&journal_name=生态学报&referenced_num=0&reference_num=35