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单物种–面积关系(ISAR)方法可判定单个物种在不同空间尺度下对邻域生物多样性的影响作用是促进、抑制或中性。尽管已有研究尝试分析了不同径级大小个体对邻域植物多样性的影响,但这方面仍缺乏较系统的研究,对不同径级植株在维持森林群落植物多样性方面的作用差异仍不清楚。本研究以河南宝天曼国家级自然保护区1ha落叶阔叶林固定样地为例,通过对全部树(包括大树和小树)分别对全部树/大树/小树,大树分别对全部树/大树/小树,小树分别对全部树/大树/小树9种类型的ISAR进行比较分析,拟验证如下假设:(1)大树相比小树来说对邻域植物多样性的影响更大,(2)同一物种或同一径级个体对邻域小树比对邻域大树的影响要强,(3)宝天曼落叶阔叶林木本植物中中性物种占主体。结果显示不同大小的树木个体对邻域植物多样性的影响作用也因空间尺度、邻域植物个体大小而有所差别:支持同一物种或同一径级个体对邻域小树比对邻域大树的影响要强的假设,没有检测到大树比小树对邻域植物多样性更大的影响作用;中性物种在所研究森林群落中1–10 m尺度上均占绝对优势,促进种的数量在全部树对全部树,全部树对小树,小树对全部树以及小树对小树情况下随着尺度的增加呈先升高后下降的趋势,抑制种在少数小尺度下被少量检测到。本研究结果有助于我们更好地认识和理解森林群落中物种作用及群落维持机制,但该结果还需在更大尺度样地以及其他类型的森林中进行检验。
The single species-area relationship (ISAR) method can be used to determine the effect of single species on neighborhood biodiversity at different spatial scales to promote, inhibit or neutralize. Although some studies have tried to analyze the impact of different size class individuals on the plant species diversity in the neighborhood, there is still a lack of systematic research in this respect. The differences in the roles of different plant species in maintaining plant diversity in forest communities remain unclear . In this study, 1ha deciduous broad-leaved forest in Baotianman National Nature Reserve of Henan Province was used as an example to study the effects of all the trees (including trees and small trees) All trees / trees / trees, trees Comparison of the nine types of ISARs for all trees / trees / trees respectively, to verify the following assumptions: (1) trees compared to trees for neighborhood plants (2) the influence of the same species or the same size individuals on the neighborhood tree is stronger than that on the big tree in the neighborhood, (3) the neutral species in the woody plant of Poitianman deciduous broad-leaved forest account for the main body . The results showed that the effect of tree species with different sizes on the plant diversity in the neighborhood was also different due to the spatial scale and the individual size of the neighboring plants: support for the same species or the same diameter individuals to the neighborhood tree than to the adjacent tree , The greater impact of the tree on the plant species diversity in the neighborhood was not detected. Neutral species accounted for the absolute superiority in the 1-10 m scale of the forest community studied, and the number of species In all the trees on the whole tree, all tree-to-tree, tree-to-tree and tree-to-tree case with the increase of the scale first increased and then decreased, the inhibitory species in a small number of small-scale detection To The results of this study will help us better understand and understand the role of species and community maintenance mechanisms in forest communities, but the results need to be tested in larger-scale plots and other types of forests.