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Influence of soils and topography on Amazonian tree diversity: a landscape-scale study

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dc.contributor.author Laurance, Susan G. en
dc.contributor.author Laurance, William F. en
dc.contributor.author Andrade, Ana C. S. en
dc.contributor.author Fearnside, Philip M. en
dc.contributor.author Harms, Kyle Edward en
dc.contributor.author Vicentini, Alberto en
dc.contributor.author Luizão, Regina C. C. en
dc.date.accessioned 2011-02-09T20:04:43Z
dc.date.available 2011-02-09T20:04:43Z
dc.date.issued 2009
dc.identifier.citation Laurance, Susan G., Laurance, William F., Andrade, Ana C. S., Fearnside, Philip M., Harms, Kyle Edward, Vicentini, Alberto, and Luizão, Regina C. C. 2009. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F12001">Influence of soils and topography on Amazonian tree diversity: a landscape-scale study</a>." <em>Journal of Vegetation Science</em>. 21 (1):96&ndash;106. <a href="https://doi.org/10.1111/j.1654-1103.2009.01122.x">https://doi.org/10.1111/j.1654-1103.2009.01122.x</a> en
dc.identifier.issn 1100-9233
dc.identifier.uri http://hdl.handle.net/10088/12001
dc.description.abstract How do soils and topography influence Amazonian tree diversity, a region with generally nutrient-starved soils but some of the biologically richest tree communities on Earth? Central Amazonia, near Manaus, Brazil. We evaluated the influence of 14 soil and topographic features on species diversity of rain forest trees (226510 cm diameter at breast height), using data from 63 1-ha plots scattered over an area of 223C400 km2. An ordination analysis identified three major edaphic gradients: (1) flatter areas had generally higher nutrient soils (higher clay content, carbon, nitrogen, phosphorus, pH and exchangeable bases, and lower aluminium saturation) than did slopes and gullies; (2) sandier soils had lower water storage (plant available water capacity), phosphorus and nitrogen; and (3) soil pH varied among sites. Gradient 2 was the strongest predictor of tree diversity (species richness and Fisher&#39;s 03B1 values), with diversity increasing with higher soil fertility and water availability. Gradient 2 was also the best predictor of the number of rare (singleton) species, which accounted on average for over half (56%) of all species in each plot. Although our plots invariably supported diverse tree communities (2265225 species ha22121), the most species-rich sites (up to 310 species ha22121) were least constrained by soil water and phosphorus availability. Intriguingly, the numbers of rare and common species were not significantly correlated in our plots, and they responded differently to major soil and topographic gradients. For unknown reasons rare species were significantly more frequent in plots with many large trees. en
dc.relation.ispartof Journal of Vegetation Science en
dc.title Influence of soils and topography on Amazonian tree diversity: a landscape-scale study en
dc.type Journal Article en
dc.identifier.srbnumber 81448
dc.identifier.doi 10.1111/j.1654-1103.2009.01122.x
rft.jtitle Journal of Vegetation Science
rft.volume 21
rft.issue 1
rft.spage 96
rft.epage 106
dc.description.SIUnit STRI en
dc.citation.spage 96
dc.citation.epage 106

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