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dc.contributor.authorSchietti, Juliana-
dc.contributor.authorEmilio, Thaise-
dc.contributor.authorRennó, Camilo Daleles-
dc.contributor.authorDrucker, Debora P.-
dc.contributor.authorCosta, Flávia Regina Capellotto-
dc.contributor.authorNogueira, Anselmo-
dc.contributor.authorBaccaro, Fabricio Beggiato-
dc.contributor.authorFigueiredo, Fernando Oliveira Gouvêa-
dc.contributor.authorCastilho, Carolina Volkmer-
dc.contributor.authorKinupp, Valdely Ferreira-
dc.contributor.authorGuillaumet, Jean Louis-
dc.contributor.authorGarcia, Ana Raquel M-
dc.contributor.authorLima, Albertina Pimental-
dc.contributor.authorMagnusson, William Ernest-
dc.description.abstractBackground: Plant composition changes with topography and edaphic gradients that correlate with soil-water and nutrient availability. Data on soil water for the Amazon Basin are scarce, limiting the possibility of distinguishing between soil and soil-water influences on plant composition. Aim: We tested a new proxy for water table depth, the terrain height above nearest drainage (HAND), as a predictor of composition in trees, lianas, palms, shrubs, and herbs and compared HAND to conventional measures of height above sea level (HASL) and horizontal distances from nearest drainage (HDND). Methods: Plant-species composition in 72 plots distributed across 64 km2 of lowland evergreen terra firme forest was summarised using non-metric multidimensional scaling (NMDS). NMDS scores were regressed against estimates of HAND, HASL and HDND. Results: Plant composition was highly correlated with the vertical distance from water table, capturing up to 82% of variation. All life forms showed highest turnover rates in the zone with seasonally water-saturated soils, which can extend 350 m from stream margins. Conclusions: Floristic composition is closely related to water table depth, and HAND appears to be the most robust available topographical metric of soil-water gradients. Brazilian conservation laws protecting 30-m-wide riparian buffers are likely to be too narrow to encompass the full zone of highest floristic turnover and may be ineffective in safeguarding riparian plant diversity. © 2014 Copyright 2013 Botanical Society of Scotland and Taylor & Francis.en
dc.relation.ispartofVolume 7, Número 1-2, Pags. 241-253pt_BR
dc.titleVertical distance from drainage drives floristic composition changes in an Amazonian rainforesten
dc.publisher.journalPlant Ecology and Diversitypt_BR
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