文献类型：期刊文献

英文题名：Spatial size diversity in natural and planted forest ecosystems: Revisiting and extending the concept of spatial size inequality

作者：Wang, Hongxiang[1] Zhao, Zhonghua[2] Myllymaki, Mari[3] Pommerening, Arne[4]

第一作者：Wang, Hongxiang

通信作者：Zhao, ZH[1]

机构：[1]Guangxi Univ, Coll Forestry, Nanning 530004, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat, Natl Forestry & Grassland Adm, Box 1958, Beijing 100091, Peoples R China;[3]Nat Resources Inst Finland Luke, Latokartanonkaari 9, FI-00790 Helsinki, Finland;[4]Swedish Univ Agr Sci SLU, Fac Forest Sci, Dept Forest Ecol & Management, Skogsmarksgrand 17, SE-90183 Umea, Sweden

年份：2020

卷号：57

外文期刊名：ECOLOGICAL INFORMATICS

收录：;Scopus(收录号：2-s2.0-85079870221);WOS:【SCI-EXPANDED(收录号:WOS:000528216500001)】；

基金：H.W. was partly supported by the Guangxi Innovation Driven Development Project (No. AA17204087-8). H.W. also gratefully acknowledges a grant from the IUFRO-EFI Young Scientists Initiative that provided him with the opportunity to work three months at the Swedish University of Agricultural Sciences at Umea (Sweden) in 2019. M.M. was supported by the Academy of Finland (project numbers 295100 and 306875). Z.Z. was funded by the National Natural Science Foundation of China (project No. 31670640).

语种：英文

外文关键词：Size diversity maintenance; Temperate and subtropical forest ecosystems; Species-rich woodland community; Reconstruction; Point process statistics

摘要：Plant size diversity or plant size inequality is a much neglected aspect of plant diversity and biodiversity. And yet size diversity plays an important role in understanding the dynamics of plant diversity and natural mechanisms of maintaining plant diversity, which is of great significance in a time of ongoing global changes. In this study, we introduced and investigated a new measure of spatial size inequality, namely the size segregation function. The new characteristic depends on distance and turned out to be a meaningful and more general extension of the traditional size differentiation index, because it describes local size inequality more extensively. To test the size segregation function we analysed and modelled thirteen large, fully mapped plots from temperate and subtropical forest ecosystems in China. We tested and validated the new function through cluster analysis and a special variant of partial spatial reconstruction. Our results showed that the size segregation function discriminated well between different patterns of spatial size diversity in the complex, mostly natural forests of China. Two random-labelling tests used in the study also highlighted how closely linked spatial species and size diversity are in such species-rich forest ecosystems: Often each species represents a distinctive size range and then spatial size inequality can be interpreted as being a consequence of spatial species mingling. This close relationship between species and size should also be taken into account in analyses of species-rich plant populations. For practical conservation this implies that high size inequality can often be found where there is high species mingling and vice versa.