作 者：
刘兴良;刘向东;何飞;周世强;杨启东;黄光忠;薛樵
单 位：
茂县林业局;中国大熊猫研究中心;阿坝州林业局;四川省林业科学研究院;理县林业局
关键词：
海拔梯度;群落;水平结构;川滇高山栎;卧龙自然保护区
摘 要：
采用标准地法对卧龙自然保护区4个海拔梯度川滇高山栎群落水平结构进行了研究,结果表明:(1)在各个海拔梯度上物种以川滇高山栎为主,其相对密度分别为61.40、65.67、77.21和62.27;随海拔升高伴生木本植物种类逐渐减少,从11种减少到3种。(2)有随海拔升高,川滇高山栎群落物种相对频度大于2.0以上的物种数量具有先升高后降低的趋势,川滇高山栎是各个梯度出现频度最大的物种。(3)川滇高山栎群落物种重要值大于5.0以上的物种数量具有随海拔升高先升高后降低的趋势,川滇高山栎在从低到高的4个海拔梯度上重要值分别为68.47、80.37、119.93和84.01。(4)林分平均树高和林分平均地径具有随海拔升高而降低的趋势,海拔每升高100 m树高和基径分别平均降低0.18 m和0.22 cm。(5)按株频度计算,在巴朗山阳坡各个海拔梯度的川滇高山栎种群多为聚集分布;而丛频度计算,在高海拔和低海拔地带川滇高山栎种群格局呈聚集分布,在中等海拔区域川滇高山栎种群格局呈随机分布或均匀分布。
译 名：
The Altitudinal Gradient Characteristics of Level Structure in the Quercus aquifolioides Community in the Balang Mountain in Wolong Nature Reserve,China
作 者：
LIU Xing-liang1 LIU Xiang-dong2 HE Fei1 ZHOU Shi-qiang6 YANG Qi-dong5 HUANG Guang-zhong3 XUE Qiao4 (1.Sichuan Academy of Forestry,Chengdu 610081,China;2.Forestry Bureau of Aba Prefecture,Maerkang 624000,China;3.Maoxian Bureau of Forestry,Maoxian County 623200,China;4.Lixian Bureau of Forestry,Lixian County 624000,China;5.Sichuanc Forest Inventory and Plan Institute,Chengdu 610081,China;6.China Protection and Research Centre of Giant Panda,Wenchuan County 623006,China)
关键词：
Altitude gradient,Q.aquifolioides,Community,Level structure,Wolong Nature Reserve
摘 要：
Using the methods of field plot investigation,researches were directed towards the characteristics of level structure in Quercus aquifolioides communities,which were distributed along altitudes from 2 400 m to 3 600 m,and in the sunny slopes of the Balang Mountain in Wolong Nature Reserve.The results are summarized as follows:(1)The main species is Quercus aquifolioides in Quercus aquifolioides communities along altitudes from 2 400 m to 3 600 m,and the relative density of woody layer of Q.aquifolioides community is 61.40,65.67,77.21 and 62.27 respectively;the companion species of woody plants gradually decline with altitudinal increase,from 11 species to 3 species.(2)There is a trend of the species number of the relative frequency(>2.0) of woody layer of Q.aquifolioides community decline with altitudinal increase in the sunny slopes of the Balang Mountain,and the species of the maximum relative frequency is a species of Q.aquifolioides at different altitudinal gradients.(3)There is a trend of the species number of important values(>5.0) of woody layer of Q.aquifolioides community decline with altitudinal increase in the sunny slopes of the Balang Mountain,and its important values are 68.47,80.37,119.93 and 84.01 respectively.(4)There is a trend of tree height decline with altitudinal increase in the sunny slopes of the Balang Mountain.The average height of tree height of Q.aquifolioides decreases almost linearly from 3.81 m at 2 200 m elevation to 1.45 m at 3 600 m elevation,with an average decrease of 0.18 m per 100 m of elevation.The average basal diameter also decrease linearly with the altitudinal increase.It decreases from 5.03 cm at 2 200 m to 1.93 cm at 3 600 m,with an average decrease of 0.22 cm per 100 m of elevation.(5)There are most types in clumped distribution according to the tree frequency figuring out the distribution pattern of Q.aquifolioides population along altitudes;This is a clumped distribution according to the clump frequency figuring out the distribution pattern of Q.aquifolioides population in high altitudes or low altitudes,and a random distribution or a regular distribution in the mid-altitudinal zone.
