Biogeographic deconstruction of alpine plant communities along altitudinal and topographic gradients
Article first published online: 12 MAR 2013
© 2013 International Association for Vegetation Science
Journal of Vegetation Science
Volume 25, Issue 1, pages 160–171, January 2014
How to Cite
Jiménez-Alfaro, B., Marcenó, C., Bueno, Á., Gavilán, R., Obeso, J. R. (2014), Biogeographic deconstruction of alpine plant communities along altitudinal and topographic gradients. Journal of Vegetation Science, 25: 160–171. doi: 10.1111/jvs.12060
- Issue published online: 16 DEC 2013
- Article first published online: 12 MAR 2013
- Manuscript Accepted: 29 JAN 2013
- Manuscript Received: 22 JUN 2012
- Fundación Biodiversidad and the Spanish Ministry of Science. Grant Number: CGL2008-00901
- Cantabrian Range;
- Community assembly;
- Environmental filtering;
- Species diversity;
- Species pool;
Are species from different biogeographic groups (mediterranean, alpine and endemic) filtered in different ways by altitude and topography in alpine plant communities? What is the relative performance of these environmental factors at predicting the species diversity of the communities as a whole and of the geographic species groups?
Picos de Europa, Cantabrian Range (Spain).
We sampled the presence and cover of vascular plants in 5-m radius plots on alpine grasslands between 1900 and 2500 m a.s.l. Five GIS-based terrain variables at 15 m × 15 m were used to model species richness and cover per plot using generalized and linear models, and the variation in species composition with redundancy analysis. The same analyses were repeated for the whole data set and for subsets of species from alpine, mediterranean and endemic distributions.
The influence of altitude and topography on species richness, cover and composition differed for the whole data set and for the geographic species groups. Altitude was the main variable affecting floristic diversity in the communities as a whole, but the separate species groups were more influenced by slope, topographic wetness index and solar radiation. Richness and cover of mediterranean species showed the strongest relationships with topography. Alpine and endemic species showed relationships with topography for species cover and composition, but not for species richness.
In alpine landscapes, biogeographic deconstruction of the species pool can provide a better understanding of the influence of altitude and topography on local communities than analysis of the entire community alone. Furthermore, the strong influence of local topography on species groups improves our understanding of how alpine species will respond to climate change.