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|a (DE-627)JST053657209
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|a (JST)4092014
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Spatial Patterns in the Understorey Shrub Genus Psychotria in Central Amazonia: Effects of Distance and Topography
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|c 2005
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|a Text
|b txt
|2 rdacontent
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|a Computermedien
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|a Online-Ressource
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|a We evaluated the effects of topography on the distribution of understorey herbs, shrubs and small trees of the pantropical genus Psychotria (Rubiaceae) in a 10,000-ha rain-forest reserve in central Amazonia. As plots were long and thin, and followed altitudinal isoclines, we were able to avoid the trade off between plot size and precision of measurement of topographical variables. The minimum distance between plots (1 km) was sufficient to avoid spatial autocorrelation in topographical variables. However, indices of plot similarity based on species composition were spatially autocorrelated to distances of at least 4 km. Although Multivariate Analysis of Covariance (MANCOVA) indicated significant effects of altitude, slope, and watershed on species composition within plots, topographical variables were generally poor surrogates for species distributions. Differences between eastern and western watersheds within the reserve were not due to distance effects, and most species occurred in both watersheds, indicating that differences in species assemblages between watersheds are determined by ecological factors. Habitat specialization and local density were not clearly associated with rarity. At scales of 1-10 km, both distance and habitat affect the distribution of understorey shrubs of the genus Psychotria, but much of the variation in species abundances remains unexplained.
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|a Copyright 2005 Cambridge University Press
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|a Amazonia
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|a Biological Survey
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|a Landscape
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|a Reserve Design
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|a Rubiaceae
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|a Spatial Autocorrelation
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|a Species Diversity
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|a Topography
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|a Tropical Forest
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|a Understorey
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|a Biological sciences
|x Biology
|x Botany
|x Plant ecology
|x Forest ecology
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|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Geologic provinces
|x Structural basins
|x Watersheds
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|a Physical sciences
|x Metrology
|x Altimetry
|x Altitude
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|a Biological sciences
|x Ecology
|x Population ecology
|x Synecology
|x Biocenosis
|x Plant communities
|x Forests
|x Rain forests
|x Tropical rain forests
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|a Biological sciences
|x Ecology
|x Population ecology
|x Synecology
|x Biocenosis
|x Plant communities
|x Forests
|x Tropical forests
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650 |
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|a Biological sciences
|x Biology
|x Botany
|x Plant ecology
|x Vegetation
|x Vegetation structure
|x Plant strata
|x Vegetation canopies
|x Understory
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650 |
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|a Biological sciences
|x Ecology
|x Population ecology
|x Synecology
|x Habitats
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|a Biological sciences
|x Biology
|x Biological taxonomies
|x Species
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|a Biological sciences
|x Biology
|x Botany
|x Dendrology
|x Trees
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650 |
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|a Biological sciences
|x Biology
|x Botany
|x Plant ecology
|x Forest ecology
|x Forest ecosystems
|x Forest habitats
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|a research-article
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|a Magnusson, William E.
|e verfasserin
|4 aut
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|i Enthalten in
|t Journal of Tropical Ecology
|d Cambridge University Press, 1985
|g 21(2005), 4, Seite 363-374
|w (DE-627)266015972
|w (DE-600)1466679-0
|x 14697831
|7 nnns
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|g volume:21
|g year:2005
|g number:4
|g pages:363-374
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|u https://www.jstor.org/stable/4092014
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|d 21
|j 2005
|e 4
|h 363-374
|