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机构地区:[1]中南林业科技大学昆虫系统进化实验室 [2]中南林业科技大学植物园,长沙410004
出 处:《林业科学》2007年第6期20-26,共7页Scientia Silvae Sinicae
基 金:国家"948"项目(200209);湖南省自然科学基金资助项目(99JJY20025)
摘 要:采用样地和样株调查相结合的研究方法,对湖南壶瓶山藤本植物的多样性进行研究。结果表明:1)藤本植物种类丰富,共有44科、111属、330种,且相对集中在某些藤本植物大科和大属中;2)全部藤本植物Simpson多样性指数为0.9823,Shannon-Wiener多样性指数为1.9060,Pielou均匀度指数为0.9016;海拔500-1200m范围内的藤本植物种类最多,多样性最高,而且分布最均匀;3)藤本植物多样性指数以常绿落叶阔叶林最高,常绿阔叶林次之,落叶阔叶林最低;4)群落演替初级阶段的藤本植物多样性明显高于演替的高级阶段;轻度的人为干扰会增加群落的藤本植物的多样性,而稳定性和均匀性降低;5)攀援机制主要分为缠绕(48.5%)、卷曲(22.7%)、搭靠(13.3%)、吸固(9.1%)、混合(6.4%)5大类;6)散布方式主要有鸟传播(35.2%)、哺乳动物散布(32.1%)、风力散布(19.7%)、自体散布(13.0%)4类。复杂的地理环境、优越的地史因素和良好的保护可能是造成本地藤本植物多样性高的主要原因。A study on vine diversity in Huping Mountain area using selected sample plots and sample trees demonstrated that: 1 ) There were 330 vine species, belonging to 111 genera and 44 families, and the vine diversity was comparably concentrated in some large vine families and large vine genera; 2) The values of Simpson index, Shannon-Wiener index and Pielou evenness index of all seed vine diversity were 0.982 3, 1.906 0 and 0.901 6, respectively. Vines exhibited highest species number, diversity, and the value of evenness index of vines between 500 - 1 200 m altitude; 3) The evergreen and deciduous broad-leaved forest showed the highest vine diversity, followed by evergreen broad-leaved forest, while deciduous broad-leaved forest had the lowest; 4) The vine diversity was higher and the vine compositive stability and evenness were lower in the early stage of conmmunity succession than that in the adult stage. Moderate human interference caused the vine diversity to increase and its composite stability to decrease; 5) Vine climbing mechanics were divided into twining (48.5%), curling (22.7%), hooking ( 13.3% ), adhering (9.1%) and mixed (6.4%) types; 6) The major dispersal modes of vine were ornithochory (35.2%), mammaliochory (32.1%), anemochory (19.7%) and autochory. (13.0%). Based on the results of this study it can be concluded that the high diversity of vines in this area can be attributed to a number of key reasons: the complicated terrain, some ancient geographical factor, and the well-conserved conditions.
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