摘要
根据4个样地40个样方资料,应用二元属性数据和数量数据对宁夏盐池人工封育区植物群落的β多样性进行了测度。结果表明:(1)Cody指数(βC),以及由群落相似性指数Jaccard指数(Cj)和Sorenson指数(Cs)得到的多样性指数(βCJ和βCS),在反映群落随时间梯度变化方面趋于一致,较好地反映了不同生境梯度上群落的差异。(2)数量数据测度方法中,以相对盖度和重要值为指标的测度结果更为合理。(3)根据数量数据Morisita—Horn指数测度的结果,长期的封育不利于植物群落的演替,使群落更易受到环境的影响。
Based on the data collected from 40 plots in 4 sampling areas, the β diversities of plant community in artificial fencing area in Yanchi County were measured by applying binary and numerical data. Results show that： （1） Cody index（βC）, as well as βCJ and βCS derived from Jaccard and Sorenson similarity indexes （Cj and Cs）, are able to reflect the community changes as the time gradient. （2） In the numerical data meas- ure methods, to measure with the relative coverage and importance value as an index, the result is more rea- sonable. （3） According to the results of Morisita--Horn index for the numerical data, the long-term cultivating is not conducive to plant community succession, which makes the communities more vulnerable to envi- ronment impacts.
出处
《水土保持通报》
CSCD
北大核心
2014年第3期257-261,299,共6页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金项目"半荒漠湿地植被群落时空分布特征研究"(30771764)
国家林业局荒漠化定位监测项目"盐池荒漠化定位监测"(660550)
关键词
人工封育
Β多样性
植物群落
测度
artificial fencing
β diversity
plant community
measurement
