石家庄山区植物群落结构及物种多样性研究

通过对石家庄山区石包垴核桃楸林中调查所涉及到的27种植物的数量特征进行分析,发现核桃楸、细叶苔草、全叶紫堇等植物的重要值较高,在群落中占据明显优势。运用物种丰富度指数(S)、Shannon-Wie-ner多样性指数(H)、Sinpson多样性指数(D)、Pielou均匀度指数(Jsw、Jsi)指标,研究了该区的物种多样性,结果表明:丰富度指数和多样性指数均表现为:草本层>乔灌层,均匀度指数表现为:乔灌层(Jsw)>草本层(Jsw)。研究中对天然林和人工林物种多样性进行了比较,结果为草本层:天然林>人工林,乔灌层:人工林>天然林,总体多样性指数为:天然林>人工林。瑙基耶尔(Raunkiaer,1934)生活型谱分析结果为:地面芽植物为44.44%,占居优势地位,隐芽植物次之,为33.33%,高位芽植物和1年生草本植物较少,无地上芽植物。

Community structure and species diversity of the forest in Shijiazhuang mountain area

The species of Juglans mandshurica,Carex rigescens,and Corydalis repens with greater importance values than the others of the 27 species are confirmed to have obvious predominance in the community by the study on the basic characters of the Juglans mandshurica natural forest of Shibaonao mountain.The species diversity of the Juglans mandshurica forest is researched using species richness,Simpson index,Shannon-wiener index and Pielou evenness index,which indicates that both species richness（S） and diversity index（H＇） are in the order of herb layertree layer,with the evenness index in tree layer（Jsw） herb layer（Jsw）.Variance analysis of the species diversity between natural community and manmade community reveals that the diversity index in the herb layer is natural community manmade community while in the tree layer it is manmade community natural community,and the general diversity between the two communities is natural communitymanmade community.The life-form spectrum analysis shows that the hemicryptophyte predominates absolutely in the community which processes 44.44%,followed by 33.33% of cryptophyte and lower percentage of therophyte and Phaenerophyte.This kind of life-form spectrum reflected the special environment and the local climate.And the result is consistent with the conclusion of Raunkiaer.