中国木樨科植物空间多样性及扩散特征  

Spatial Diversity and Diffusion Characteristics of Oleaceae in China

作　　者：岳晓英 邱丽氚 王建 Yue Xiaoying;Qiu Lichuan;Wang Jian(School of Geographical Sciences,Taiyuan Normal University,Jinzhong 030619,China)

机构地区：[1]太原师范学院地理科学学院,山西晋中030619

出　　处：《中国野生植物资源》2024年第5期102-108,共7页Chinese Wild Plant Resources

基　　金：国家自然科学基金(41801016,41071335)。

摘　　要：目的:以木樨科植物为研究对象,制作中国木樨科植物空间分布图,分析木樨科植物分布规律,为植物研究、开发利用、保护及恢复提供依据。方法:利用ArcGIS制作以县为单元的中国木樨科植物空间分布图,计算空间多样性格局指标,得到空间多样性分布格局,从空间上分析木樨科植物分布的特点。结果:(1)木樨科植物多样性总体呈现南高北低趋势。(2)木樨科植物从西藏东南部起至东北黑龙江东南部形成一条“木樨科植物分布线”,此线东南方向木樨科植物分布类型多,聚集性明显,西北方向呈离散分布聚集性差。(3)横断山脉地区是中国木樨科植物分布的多样性中心,从中心向外主要呈现3条明显的扩散通道。(4)当中国木樨科植物的属或种数量为1时,其所占斑块数量、斑块所占面积、最大斑块指数以及景观形状指数均为最大,属的指标数值均高于种,随着属、种数量的不断增大,各项指标数据逐渐减小。结论:中国木樨科属在其空间分布、多样性、扩散呈现独特的规律。Objective:Oleaceae was studied.The spatial distribution map of Oleaceae in China was made.The distribution law of Oleaceae was analyzed.It provided a basis for development and utilization,protection,restoration of plant.Methods:ArcGIS was used in the paper.Map of spatial distribution of Oleaceae in China was made by the county.Indices of diversity pattern were calculated.The spatial diversity distribution pattern was obtained.The characteristics of the spatial distribution of Oleaceae were analyzed.Results:(1)The diversity of Oleaceae was generally high in the south and low in the north.(2)‘Oleaceae distribution line’was from southeastern Tibet to southeastern Heilongjiang in Oleaceae.There were many types and obvious aggregation of Oleaceae in the southeast of this line.But there were low aggregation of discrete distributions in the northwest of this line.(3)The Hengduan Mountains region was the diversity center of the distribution of Oleaceae in China.There were mainly three obvious diffusion channels from the center to the outside.(4)When the number of genera or species of Oleaceae in China was one,the number of patches,the area of patches,the largest patch index,and the landscape shape index were the largest.And the index values of genera were higher than those of species.With the increase in the number of genera and species,the index data gradually decreased.Conclusion:Oleaceae and its genera in China were unique patterns in their spatial distribution,diversity and diffusion.

关 键 词：木樨科 空间多样性格局 ARCGIS 中国 

分 类 号：Q948.2[生物学—植物学]