Topography and edge effects are more important than elevation as drivers of vegetation patterns in a neotropical montane forest
Version of Record online: 16 DEC 2013
© 2013 International Association for Vegetation Science
Journal of Vegetation Science
Volume 25, Issue 3, pages 724–733, May 2014
How to Cite
Lippok, D., Beck, S. G., Renison, D., Hensen, I., Apaza, A. E., Schleuning, M. (2014), Topography and edge effects are more important than elevation as drivers of vegetation patterns in a neotropical montane forest. Journal of Vegetation Science, 25: 724–733. doi: 10.1111/jvs.12132
- Issue online: 10 APR 2014
- Version of Record online: 16 DEC 2013
- Manuscript Accepted: 24 SEP 2013
- Manuscript Received: 26 APR 2013
- German Science Foundation (DFG)
- Edge effects;
- Forest structure;
- Species composition;
- Species richness;
- Tropical montane forests
The high plant species diversity of tropical mountain forests is coupled with high habitat heterogeneity along gradients in elevation and topography. We quantified the effects of elevation, topography and forest edge on habitat conditions and woody plant diversity of tropical montane forest fragments.
Tropical montane forest fragments, ‘Yungas’, Bolivia.
We measured microclimate and sampled soil properties and woody vegetation at forest edges and in the forest interior on ridges and in gorges along an elevational gradient of 600 m. We analysed effects of elevation, topography and forest edge on habitat conditions (i.e. microclimate, soil properties and forest structure), species richness, evenness and composition with linear mixed effects models and detrended correspondence analysis (DCA).
Changes in habitat conditions were weaker along the elevational gradient than between forest interior and forest edge and between different topographies. Species richness was not affected by any gradient, while species evenness was reduced at forest edges. All three gradients affected species composition, while effects of topography and forest edge were stronger than that of elevation.
In general, effects of the 600-m elevational gradient were weak compared to effects of forest edge and topography. Edge effects shifted species composition towards pioneer species, while topographical heterogeneity is particularly important for generating high diversity in montane forests. These results underscore that edge effects have severe consequences in montane forest remnants and that small-scale variation between topographical microhabitats should be considered in studies that predict monotonous upslope migrations of plant species in tropical montane forests due to global warming.