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| 1 | Efects of topographic variability and forest attributes on fne-scale soil fertility in late-secondary succession of Atlantic Forest显示文摘Background:Understanding how soil fertility changes due to topographical conditions and forest attributes is an essential premise for local-scale forest management practices.We evaluated the efects of topographic variables and forest attributes on soil fertility along a local topographical gradient in a Brazilian Atlantic Forest.We hypothesised that soil fertility is positively afected by topographic variability and forest attributes(structure and diversity).We used tree species richness,composition,abundance,and aboveground biomass as forest attributes.We analysed two 1-ha for‑est patches with contrasting topographical conditions.We used diferent linear mixed efects models(LMMs)to test the main efects of diferent forest attributes and topography variables on soil fertility.Results:The results showed that higher topographic variability determines soil fertility along a fne-scale gradient.The frst two axes of the PCA explained 66.8%of the variation in soil data,with the frst axis(PCA_(1))explaining 49.6%of the variation in soil data and positively correlating with fertility-related soil properties.The second axis(PCA_(2))explained 17.2%of the variation in topographical data and positively correlated with convexity(the elevation of a plot minus the average elevation of all immediate neighbour plots)and elevation.Our best models showed that topo‑graphic variables(elevation and convexity)are the main predictors that afect fne-scale soil fertility.Conclusions:Our study demonstrates that the topographic variability,mainly elevation and convexity,determines fne-scale soil fertility in an Atlantic Forest.These results advance our understanding that context-dependent condi‑tions based on topography and soil properties have a high variability at a fne scale,which can infuence variations in forest attributes(i.e.,species distribution,diversity and structure of tree communities).In addition,the information generated in this research may be important for planning forest restoration activities(passive and active)based on the high variability of environmental variables at a fne scale. | Alice Cristina Rodrigues Pedro Manuel Villa Walnir Gomes Ferreira‑Júnior Carlos Ernesto RGSchaefer Andreza Viana Neri | 2021 | Ecological Processes2021，10，1： | 0 |
| 2 | 植物群落构建研究热点与发展趋势分析显示文摘群落构建研究是用于阐明物种共存与物种多样性的形成与维持机制的有效途径,也是群落生态学研究中的核心问题。利用CiteSpace软件对2002—2022年植物群落构建领域在国内外发表的文献进行统计分析,结果表明:(1)国内外植物群落构建研究的发文量总体上均呈现增长趋势,中国机构发文量为全球第一。(2)植物功能性状和系统发育多样性是国际植物群落构建研究领域的主要内容,且植物功能性状、系统发育多样性、生态修复为该领域近几年研究的热点。(3)国内研究方向主要为:群落构建、园林植物、植物群落、功能性状、物种多样性,且国内已形成较为完整的研究体系。(4)功能多样性、系统发育多样性、环境筛选、扩散限制等方向是植物群落构建领域的研究前沿。 | 彭书婷 王秋雪 黄柳菁 | 2023 | 山东林业科技2023，53，6： | 0 |
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