新疆喀纳斯旅游区树种多样性垂直格局与自然火干扰  

Altitudinal pattern of species richness of tree and effect of natural fire disturbance in Kanas Tourism District,Xinjiang

作　　者：刘翠玲[1] 潘存德[1] 吴晓勇 寇福堂 谭卫平 

机构地区：[1]新疆农业大学林学院,新疆乌鲁木齐830052 [2]喀纳斯国家自然保护区,新疆布尔津836600

出　　处：《生态学报》2009年第8期4157-4162,共6页Acta Ecologica Sinica

基　　金：国家自然科学基金资助项目(30560124)

摘　　要：采用典型样带调查法,通过对新疆喀纳斯旅游区树种多样性垂直格局及其与自然火干扰分布关系的研究,揭示了树种多样性沿海拔梯度的分布格局及其对自然火干扰的响应特征。结果表明:①树种多样性随海拔的升高呈现明显的下降态势(P<0.01),但树种多样性与海拔高度之间的相关程度不高(R2=0.2165),并且表现出以1900m为界的区域性变化特征。②所调查范围内共发生了8次自然火干扰事件,平均间隔时间为14 a,干扰事件多集中在1900m以下的较低海拔区。③林分受自然火干扰作用后,树种多样性普遍表现出增加的特征。总体而言,海拔高度是影响喀纳斯森林群落树种多样性垂直分布格局形成的基本因素,但随机发生的自然火干扰是主导1900m以下较低海拔区树种多样性丰富的关键因素之一。Biodiversity is the basis of sustainable development of ecosystem. Exploring pattern dynamics and formation mechanism of biodiversity is important for recognizing the structure and function of ecosystem. Three representative transects were chosen in Kanas Tourism District in Xinjiang Province, and the data of fire disturbance affair, species richness of tree and altitudinal gradients were collected and analyzed. The work was aimed to study the characteristic of species richness of tree along altitudinal gradients and its response to the fire disturbance in research area. The results show that the species richness of tree along altitudinal gradients displayed a distinct downtrend（ P 〈 0.01 ） , but the altitudinal gradient was not the major factor for determining the species richness of tree （ R^2 = 0. 2165 ）. There were eight fire affairs from 1880a to 1980a, and the mean interval was 14a. The fire affairs mainly occurred at the area below 1900m a. s. 1. Species richness of tree at fire disturbance stand was higher than that at no-disturbance stand. The elevation was the fundamental factor to influence the altitudinal pattern of species richness of tree. Random of fire affair was the main factor which controlled species richness of tree at the area below 1900m a. s. 1.

关 键 词：喀纳斯旅游区 树种多样性 垂直格局 自然火干扰 

分 类 号：Q948[生物学—植物学]