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Landscape Ecology

, Volume 26, Issue 4, pp 529–540 | Cite as

Dispersal traits determine plant response to habitat connectivity in an urban landscape

  • Andrea Schleicher
  • Robert Biedermann
  • Michael Kleyer
Research Article

Abstract

Identification of trait syndromes that make species vulnerable to habitat fragmentation is essential in predicting biodiversity change. Plants are considered particularly vulnerable if their capacities for persistence in and for dispersal among local habitats are low. Here we investigated the influence of easily measured functional traits on the presence of 45 plant species in an urban landscape in north-west Germany where patches were separated by distances consistent with regular plant dispersal range. To describe the spatial configuration of patches we calculated species-specific patch connectivities. Then we assessed plant connectivity responses in distribution models calculated from connectivities and environmental predictors. Twenty (45%) of the analysed species showed a positive connectivity response after accounting for species-specific habitat requirements. These species differed from non-responsive species by functional traits associated with dispersal, including reduced seed numbers and higher terminal velocities relative to non-responsive species. Persistence traits played however no role which we attribute to the environmental conditions of urban habitats and their spatiotemporal characteristics. Our study underlines that even ruderal plants experience dispersal limitation and demonstrates that easily measured functional traits may be used as indicators of fragmentation vulnerability in urban systems allowing generalizations to larger species sets.

Keywords

Assembly rules Dispersal limitation Habitat fragmentation Local persistence Model averaging Plant functional traits Spatial autocorrelation 

Notes

Acknowledgments

This study was conducted as part of the collaborative research project ASSEMBLE within the ESF-Eurodiversity Programme (05_EDIV_FP040-ASSEMBLE) and was supported by the German Science Foundation (KL 756/2-1) and the European Science Foundation. We thank H.J. Poethke and N. Mason for useful comments on the manuscript, K. Thompson who did the seed terminal velocity measurements as part of the LEDA project and U. Schadek for providing plant trait data and the many students having assisted in collecting field data.

Supplementary material

10980_2011_9579_MOESM1_ESM.pdf (115 kb)
Supplementary material 1 (PDF 115 kb)

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Andrea Schleicher
    • 1
    • 2
  • Robert Biedermann
    • 1
  • Michael Kleyer
    • 1
  1. 1.Landscape Ecology Group, Institute of Biology and Environmental SciencesUniversity of OldenburgOldenburgGermany
  2. 2.ANUVA Landscape PlanningNürnbergGermany

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