长春市绿地珍稀树种多样性和空间分布格局研究

Research on the Diversity and Spatial Distribution Pattern of Rare Tree Species in Green Spaces in Changchun City

采用分层抽样的方法共设置924块样地,对珍稀树种组成、多样性、空间分布特征、树木维度和健康状况进行了调查分析。结果表明:长春市各类绿地共有国家级和省级珍稀树种11科14属18种16361株,红皮云杉(Picea koraiensis)重要值为15.2%,占明显优势,其次依次为水曲柳(Fraxinus mandshurica)、沙松(Abies holophylla)、刺榆(Hemiptelea davidii)及黄檗(Phellodendron amurense),重要值分别为13.90%、13.33%、11.81%和9.94%。绿地建设时间和用地性质是影响珍稀树种丰富度和多样性的重要因素。公园绿地珍稀树种最丰富,共有16种11154株,分别占总种数和总株数的88.89%和68.17%,其次是附属绿地,有珍稀树种14种4873株,分别占总种数和总株数的77.78%和29.78%。朝阳区珍稀树种最丰富,共有15种9472株,分别占总种数和总株数的83.33%和57.89%,其次是长春新区,共有14种2445株,分别占总种数和总株数的77.78%和14.94%。

A total of 924 plots were set up using stratified sampling method to investigate and analyze the composition,diversity,spatial distribution characteristics,tree dimensions and health status of rare tree species.The results showed that there were a total of 16361 rare tree species belonging to 11 families,14 genera,18 species in various green spaces in Changchun City.Picea koraiensis had an important value of 15.2%,accounting for a significant advantage,followed by Fraxinus mandshurica,Abies holophylla,Hemiptela davidii and Phellodendron amurense.Their important values were 13.90%,13.33%,11.81%and 9.94%,respectively.The construction time and land use nature of green spaces are important factors affecting the richness and diversity of rare tree species.The park green space has the most abundant rare tree species,with a total of 16 species and 11154 plants,accounting for 88.89%and 68.71%of the total,respectively.The second is the affiliated green space,which has 14 species and 4873 plants,accounting for 77.78%and 29.78%of the total,respectively.Chaoyang District has the most abundant rare tree species,with a total of 15 species and 9472 plants,accounting for 83.33%and 57.89%of the total,followed by Changchun New Area,with a total of 14 species and 2445 plants,accounting for 77.78%and 14.94%of the total,respectively.