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Folia Geobotanica

, Volume 46, Issue 2–3, pp 255–270 | Cite as

Diversity and Frequency of Clonal Traits Along Natural and Land-Use Gradients in Grasslands of the Swiss Alps

  • Camilla Wellstein
  • Patrick Kuss
Article

Abstract

The frequency of clonal plants in different vegetation types is known to be influenced by environmental and land-use factors. However, the underlying behavior of individual clonal traits or clonal trait diversity has received little attention. Here, we assess for species- and trait-diverse grasslands of the Swiss Alps the relative importance of temperature, soil moisture, land use and species richness on the diversity and frequency of individual compared with all clonal traits. We further analyzed how cover-weighted data alters the relationships found with commonly used presence-absence data. We combined species compositional, land-use and environmental data from 236 28-m2 grassland plots with clonal trait information for 527 species following the Clonal Growth Organ (CGO) classification. Test results are based on linear models, ANOVAs and ANCOVAs. The grassland sites were 84% dominated by clonal species. Drought-prone grasslands harbored the least clonal species. No increase in clonality was detected with decreasing temperature (= altitude). Mown or pastured grasslands had more clonal species than fallows. Certain sets of traits were correlated. Rhizomatous species especially reacted strongly to climatic and land-use gradients and had highest frequencies in cold, moist and disturbed sites. Clonal diversity was strongly dependent on species richness. Cover-weighted and presence-absence based estimates were largely similar. Overall, our data outlined that common clonal traits react differently to natural and land-use gradients as well as differently to the sum of clonal traits. Also, soil moisture was more decisive than temperature (= altitude) for the presence of clonal species. Lastly, the strong correlation between species-richness and clonal trait diversity needs to be accounted for when interpreting the functional role of clonal traits.

Keywords

Altitude Climatic gradients CLO-PLA database Functional traits Weighted abundance 

Notes

Acknowledgement

The authors thank the Swiss Federal Office for the Environment and S. Eggenberg (UNA Bern, CH) for access to and support with the TWW database, O. Wildi (WSL, CH) for provision of bioclimatic parameters and J. Klimešová (Institute of Botany, Třeboň, CZ) for support with clonal trait classification. Further, the authors greatly appreciate the comments by J. Klimešová, D. Prati and two anonymous reviewers on previous versions of the manuscript. Last but not least, the authors kindly acknowledge the financial support of the German Academic Exchange Service (D/07/01321), the Stiftung zur Förderung der Pflanzenkenntnis (Basel, CH) and the logistic facilitation by the Jungfraubahnen AG (Interlaken, CH).

Supplementary material

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Copyright information

© Institute of Botany, Academy of Sciences of the Czech Republic 2010

Authors and Affiliations

  1. 1.Biogeography, University of BayreuthBayreuthGermany
  2. 2.Institute of Plant SciencesUniversity of BernBernSwitzerland

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