六盘山辽东栎林种群结构和空间分布格局  

Population structure and spatial distribution pattern of Quercus wutaishanica in Liupan Mountains

作　　者：张中惠 郭建斌[1] 王彦辉[2] 王晓 ZHANG Zhonghui;GUO Jianbin;WANG Yanhui;WANG Xiao(School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China;Key Laboratory of Forestry Ecology and Environment of National Forestry and Grassland Administration,Research Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,Beijing 100091,China)

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]中国林业科学研究院森林生态环境与保护研究所国家林业和草原局森林生态环境重点实验室,北京100091

出　　处：《浙江农林大学学报》2021年第6期1091-1099,共9页Journal of Zhejiang A&F University

基　　金：国家自然科学基金委员会区域创新发展联合基金项目(U20A2085);宁夏“一二三产业”融合发展科技创新示范项目(YES-16-12)。

摘　　要：【目的】辽东栎Quercus wutaishanica是组成六盘山森林植被的主要树种,分析六盘山辽东栎种群的空间分布格局和关联性,有助于掌握六盘山辽东栎的生长发育现状及种群发展过程。【方法】基于六盘山12个辽东栎纯林样地,通过静态生命表、种群径级结构、存活系数、死亡率、消失率以及生存分析,对辽东栎种群结构和动态进行了分析;采用点格局分析了六盘山辽东栎林种群空间格局分布规律以及空间关联性。【结果】(1)样地内辽东栎种群径级结构分布近似于倒J型,更新状况良好,结构稳定。(2)辽东栎种群的存活曲线接近于Deevey-Ⅱ型曲线。(3)辽东栎种群整体呈前期和中期稳定、后期衰退的动态特征。(4)辽东栎幼龄、中龄级个体在小尺度范围内呈聚集分布,随着尺度增大,由聚集分布变为随机分布;近熟龄个体在小尺度上趋向于均匀分布,在大尺度上呈随机分布。【结论】六盘山辽东栎种群处于相对稳定状态,更新状况良好。辽东栎幼龄、中龄级个体在小尺度呈聚集分布,中龄与近熟龄个体在大尺度上关联性不明显,呈相互独立状态。为保持辽东栎林结构稳定,应加强人为调控,确保辽东栎林种群更新的稳定环境条件。图8表2参24。[Objective] Quercus wutaishanica is the main tree species in Liupan Mountains. This study aims to analyze the spatial distribution pattern and correlation of Q. wutaishanica population in Liupan Mountains, so as to understand the growth and development status and population development process of Q. wutaishanica community in this area. [Method] Based on 12 pure forest plots of Q. wutaishanica in Liupan Mountains, the population structure and dynamics of Q. wutaishanica were studied by static life table, diameter class structure,survival coefficient, mortality rate, disappearance rate and survival analysis. Point pattern was used to analyze the spatial pattern and spatial correlation of Q. wutaishanica population in Liupan Mountain area. [Result](1) The distribution of diameter class structure of Q. wutaishanica in the sample plots was close to the inverted J type,with good renewal status and stable structure.(2) The survival curve of Q. wutaishanica population was close to the deevey-Ⅱcurve.(3) The population of Q. wutaishanica was stable in the early and middle stages and declined in the late stage.(4) The young and middle age individuals of Q. wutaishanica showed aggregation distribution in small scale, which changed from aggregation distribution to random distribution with the increase of scale. Individuals of near maturity tended to distribute evenly on small scale and randomly on large scale.[Conclusion] The tree population of Q. wutaishanica in Liupan Mountains is relatively stable and in good regeneration condition. The young and middle age individuals of Q. wutaishanica show aggregation distribution in small scale, and the correlation between middle age and near mature individuals is not obvious in large scale,independent of each other. In order to keep the structure of Q. wutaishanica forest stable, human regulation should be strengthened to ensure the stable environmental conditions for population regeneration of Q.wutaishanica forest. [Ch, 8 fig. 2 tab. 24 ref.]

关 键 词：辽东栎 种群结构 生存分析 点格局分析 六盘山 

分 类 号：S718.5[农业科学—林学]