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|a eng
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|a Kessler, Michael
|e verfasserin
|4 aut
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|a The impact of sterile populations on the perception of elevational richness patterns in ferns
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|c 2011
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|a Text
|b txt
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|a Computermedien
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|a Dispersal may influence the spatial distribution of species richness through mass or source-sink effects, but the extent of sink populations at the community level remains largely unknown due to difficulties of identifying such populations. We compared the richness patterns of ferns in 333 plots along six tropical elevational gradients in America, the Mascarenes, and southeast Asia, using sterile populations as an indication of sink populations. First, we tested whether sterile fern records were more common towards the elevational range limits of the individual species, but found this pattern in only one out of ten cases. It is therefore uncertain if sterile records correspond to marginal sink populations. Second, we compared the elevational richness patterns of sterile and fertile species. In several cases, elevational trends for sterile and fertile records were quite similar, but in others they differed distinctly. The percentage of sterile records per plot decreased with elevation among epiphytic ferns along all six transects, whereas terrestrials showed mixed results (decrease, increase, and U-shaped patterns). The percentage of sterile species records per plot relative to the number of species per plot recovered four significant patterns among the twelve cases analysed: higher percentages at higher species numbers among terrestrial ferns on two transects and lower percentages among epiphytes on two others. Despite the problems with equating sterile records to sink populations, we thus found distinct elevational patterns of sterile records that clearly affected our perception of the overall richness patterns. Ignoring the impact of population dynamics on diversity patterns is thus liable to result in misinterpretations of the diversity patterns.
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|a Copyright © 2011 Ecography
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|a Biological sciences
|x Biology
|x Biological taxonomies
|x Species
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650 |
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4 |
|a Biological sciences
|x Biology
|x Botany
|x Pteridology
|x Ferns
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650 |
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4 |
|a Biological sciences
|x Biology
|x Botany
|x Plants
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650 |
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4 |
|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Topography
|x Topographical elevation
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650 |
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4 |
|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Landforms
|x Tectonic landforms
|x Mountains
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650 |
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4 |
|a Biological sciences
|x Ecology
|x Population ecology
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650 |
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4 |
|a Biological sciences
|x Ecology
|x Plant ecology
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650 |
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4 |
|a Social sciences
|x Population studies
|x Population dynamics
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650 |
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4 |
|a Biological sciences
|x Biology
|x Botany
|x Plants
|x Climbing plants
|x Epiphytes
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650 |
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4 |
|a Social sciences
|x Psychology
|x Cognitive psychology
|x Perception
|x Pattern perception
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|a research-article
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1 |
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|a Hofmann, Sandra
|e verfasserin
|4 aut
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1 |
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|a Krömer, Thorsten
|e verfasserin
|4 aut
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700 |
1 |
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|a Cicuzza, Daniele
|e verfasserin
|4 aut
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700 |
1 |
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|a Kluge, Jürgen
|e verfasserin
|4 aut
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773 |
0 |
8 |
|i Enthalten in
|t Ecography
|d Nordic Society Oikos, 1992
|g 34(2011), 1, Seite 123-131
|w (DE-627)320639789
|w (DE-600)2024917-2
|x 16000587
|7 nnns
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773 |
1 |
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|g volume:34
|g year:2011
|g number:1
|g pages:123-131
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|u http://dx.doi.org/10.1111/j.1600-0587.2010.06371.x
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|d 34
|j 2011
|e 1
|h 123-131
|