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Testing for the influence of niche and neutral factors on sapling community assembly beneath isolated woody plants in grasslands

2010; Wiley; Volume: 21; Issue: 3 Linguagem: Inglês

10.1111/j.1654-1103.2009.01153.x

1654-1103

Leandro Duarte, Gabriel Selbach Hofmann, Melina Marchesini Grassotti dos Santos, Sandra Maria Hartz, Valério D. Pillar,

Species Distribution and Climate Change

Journal of Vegetation ScienceVolume 21, Issue 3 p. 462-471 Testing for the influence of niche and neutral factors on sapling community assembly beneath isolated woody plants in grasslands Leandro da S. Duarte, Leandro da S. Duarte Departamento de Ecologia, Universidade Federal do Rio Grande do Sul, CP 15007, Porto Alegre, RS 91501-970, Brazil.Search for more papers by this authorGabriel S. Hofmann, Gabriel S. Hofmann Departamento de Ecologia, Universidade Federal do Rio Grande do Sul, CP 15007, Porto Alegre, RS 91501-970, Brazil.Search for more papers by this authorMelina M. G. Dos Santos, Melina M. G. Dos Santos Departamento de Ecologia, Universidade Federal do Rio Grande do Sul, CP 15007, Porto Alegre, RS 91501-970, Brazil.Search for more papers by this authorSandra M. Hartz, Sandra M. Hartz Departamento de Ecologia, Universidade Federal do Rio Grande do Sul, CP 15007, Porto Alegre, RS 91501-970, Brazil.Search for more papers by this authorValério D. Pillar, Valério D. Pillar Departamento de Ecologia, Universidade Federal do Rio Grande do Sul, CP 15007, Porto Alegre, RS 91501-970, Brazil.Search for more papers by this author Leandro da S. Duarte, Leandro da S. Duarte Departamento de Ecologia, Universidade Federal do Rio Grande do Sul, CP 15007, Porto Alegre, RS 91501-970, Brazil.Search for more papers by this authorGabriel S. Hofmann, Gabriel S. Hofmann Departamento de Ecologia, Universidade Federal do Rio Grande do Sul, CP 15007, Porto Alegre, RS 91501-970, Brazil.Search for more papers by this authorMelina M. G. Dos Santos, Melina M. G. Dos Santos Departamento de Ecologia, Universidade Federal do Rio Grande do Sul, CP 15007, Porto Alegre, RS 91501-970, Brazil.Search for more papers by this authorSandra M. Hartz, Sandra M. Hartz Departamento de Ecologia, Universidade Federal do Rio Grande do Sul, CP 15007, Porto Alegre, RS 91501-970, Brazil.Search for more papers by this authorValério D. Pillar, Valério D. Pillar Departamento de Ecologia, Universidade Federal do Rio Grande do Sul, CP 15007, Porto Alegre, RS 91501-970, Brazil.Search for more papers by this author First published: 13 April 2010 https://doi.org/10.1111/j.1654-1103.2009.01153.xCitations: 20 Duarte, L.S. (corresponding author, duarte.ldas@gmail.com), Hofmann, G.S. (hofmann.gabriel@gmail.com), Dos Santos, M.M.G. (melina.mgsantos@gmail.com), Hartz, S.M. (sandra.hartz@ufrgs.br) & Pillar, V.D. (vpillar@ufrgs.br): Departamento de Ecologia, Universidade Federal do Rio Grande do Sul, CP 15007, Porto Alegre, RS 91501-970, Brazil. Co-ordinating Editor: Dr. Janos Podani. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Questions: Perching and nursing effects drive initial steps of forest expansion over grasslands. Nursing effect is obviously related to niche mechanisms, while perching effect is likely to result both from neutral and niche factors. This study assessed the effect of neutral and niche factors on species composition in sapling communities developing beneath isolated trees/shrubs (ITS) in grassland. Location: A mosaic of Campos grassland and Araucaria forest in São Francisco de Paula, southern Brazil (29°28′S, 50°13′W). Methods: We described sapling communities beneath 32 ITS using mean number of forest woody saplings of different species. We performed a stepwise canonical correspondence analysis (CCA) to select ITS traits that maximized the association with species composition. Then we evaluated the contribution of distance from seed source, ITS traits and distance-structured ITS traits on sapling community assembly using a variation partitioning method based on CCA and partial CCA. Results: Sapling species composition was significantly explained by ITS traits (ITS dispersal mode, ITS growth form, crown area:ITS height ratio, crown area, ITS height and crown area:volume ratio). Distance from seed sources explained only a minor, non-significant fraction of sapling species composition. Distance-structured trait variation was negligible. Conclusions: Sapling community assembly beneath ITS was mostly explained by niche factors related to both nursing and perching effects. Dispersal limitation explained only a small fraction of variation in species composition beneath ITS, suggesting that neutral-based perching effect had a minor role in community assembly. Citing Literature Volume21, Issue3June 2010Pages 462-471 RelatedInformation