Measuring Pattern Diversity of Hubei Province Vegetation Based on Affinity Analysis

Lamei Cheng, J. Ge, Zhao-Jun Wu, Zi-Ye Wang, Jianfeng Li
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Abstract

Taking formation as an index,the vegetation pattern diversity of Hubei Province was measured by affinity analysis.Results showed that mosaic diversity(m) of the Hubei Province vegetation landscape was 4.071,the landscape was complicated and there was no obvious ecological gradient.According to mean affinities(MA),the Hubei Province vegetation pattern was divided into three categories: the first central point category included vegetation from Wuhan City,Xiangyang City,Huanggang City and Suizhou City,which were typical,common,and played a key role in coupling patches in the whole vegetation pattern;the second outer point category included vegetation from Hefeng County,Lichuan City and Xianfeng County,which were rare,native and had important significance in composing the specificity and diversity of the whole landscape;the third middle point category included vegetation from Huangshi City,Jingzhou City,Jingmen City,and Yichang City(totally 14 administrative division units),which showed universality and rarity,were moderate,occupied more habitat space,and constituted the foundation of the whole vegetation pattern.Sorting mean similarity(MS) from central points to outer points showed that the similarity of adjacent regions was high.Northwest,Southeast and the Jianghan plain of Hubei formed the universality of the whole vegetation pattern;however Southwest Hubei constituted the specificity of the vegetation pattern.Large differences existed in the vegetation patterns between east and west Hubei Province,and the vegetation patterns were complicated.
基于亲和分析的湖北省植被格局多样性测度
以形成为指标,采用亲和分析方法对湖北省植被格局多样性进行了测度。结果表明:湖北省植被景观的马赛克多样性(m)为4.071,景观较为复杂,不存在明显的生态梯度;根据平均亲和度(MA),将湖北省植被格局划分为3类:第一类中心点包括武汉市、襄阳、黄冈市和随州市的植被,它们是典型的、常见的,在整个植被格局中起着耦合斑块的关键作用;第二类中心点包括鹤峰县、利川市和咸丰县的植被,它们是稀有的、原生的,对构成整个景观的特异性和多样性具有重要意义黄石市、荆州市、荆门市和宜昌市(共14个行政区划单位)具有普遍性和稀有性,分布适中,占据较多的生境空间,构成了整个植被格局的基础。从中心点到外点的平均相似度(MS)排序表明相邻区域的相似度较高。湖北西北部、东南部和江汉平原构成了整个植被格局的普遍性,而湖北西南部构成了植被格局的专一性。鄂东、鄂西植被格局差异较大,植被格局较为复杂。
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