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Plant Ecology

, Volume 220, Issue 2, pp 183–197 | Cite as

Overwhelming effects of autumn-time drought during seedling establishment impair recovery potential in sown and semi-natural pastures in Portugal

  • Marjan JongenEmail author
  • Alina C. Förster
  • Stephan Unger
Article

Abstract

Climate change-induced alterations to precipitation may affect the regeneration dynamics of plant species, with the occurrence of drought influencing germination and seedling establishment. In Mediterranean grasslands, typically dominated by C3 annual species, germination occurs rapidly once sufficient rain falls in autumn. However, a single large precipitation event may be followed by a dry spell, with possible consequences for vegetation composition and productivity. We investigated the effects of autumn-time drought on germination and seedling establishment, and the subsequent recovery potential, in semi-natural and sown pastures. Although the majority of grasslands in Portugal are semi-natural, sowing legume-rich seed mixtures is an increasingly common agricultural practice in Portugal. Our results show an overwhelming effect of autumn-time drought on seedling establishment, with the semi-natural pasture being more compromised than the sown pasture. However, after the recovery period, the semi-natural pasture exhibited tendentially higher aboveground biomass recovery than the sown pasture. The differential species sensitivity to autumn-time drought and subsequent implications for recovery potential may be important for the agricultural practice of sown pastures, justifying additional research for drought-tolerant cultivar improvement to maintain productivity with climate change.

Keywords

Arbuscular mycorrhizal fungi Drought Functional group abundance Mediterranean grasslands Recovery Resistance 

Notes

Acknowledgements

The authors gratefully acknowledge the financial support of FCT (Fundação para a Ciência e Tecnologia), through a postdoctoral fellowship to Marjan Jongen (SFRH/BPD/79662/2011), and the Erasmus + programme of the European Union, for funding the internship of Alina Förster. The authors wish to thank Julia Giesbrecht, Phillip Borgmann, Elke Furlkröger, Christine Schlüter and Barbara Teichner for their valuable help with the laboratory work and analyses, Karin Schrieber for valuable help with the statistical analysis, and Peter Fay for suggestions on the manuscript.

Supplementary material

11258_2018_869_MOESM1_ESM.docx (1 mb)
Supplementary material 1 (DOCX 1060 kb)

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© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.MARETEC/LARSYS, Instituto Superior TécnicoUniversidade de LisboaLisbonPortugal
  2. 2.Centro de Estudos Florestais, Instituto Superior de AgronomiaUniversidade de LisboaLisbonPortugal
  3. 3.Department of Experimental and Systems EcologyUniversity of BielefeldBielefeldGermany

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