Species richness effects on grassland recovery from drought depend on community productivity in a multisite experiment

Kreyling J., Dengler J., Walter J., Velev N., UĞURLU E., Sopotlieva D., ...More

ECOLOGY LETTERS, vol.20, no.11, pp.1405-1413, 2017 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 20 Issue: 11
  • Publication Date: 2017
  • Doi Number: 10.1111/ele.12848
  • Journal Name: ECOLOGY LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1405-1413
  • Keywords: Asynchrony, diversity-stability relationship, resilience, insurance hypothesis, extreme event ecology, coordinated distributed experiment, ECOSYSTEM PRODUCTIVITY, BIODIVERSITY EXPERIMENTS, SEMINATURAL GRASSLANDS, ECOLOGICAL STABILITY, CLIMATE EXTREMES, PLANT DIVERSITY, RESISTANCE, VARIABILITY, COMPLEXITY, HYPOTHESIS
  • Dokuz Eylül University Affiliated: No


Biodiversity can buffer ecosystem functioning against extreme climatic events, but few experiments have explicitly tested this. Here, we present the first multisite biodiversityxdrought manipulation experiment to examine drought resistance and recovery at five temperate and Mediterranean grassland sites. Aboveground biomass production declined by 30% due to experimental drought (standardised local extremity by rainfall exclusion for 72-98 consecutive days). Species richness did not affect resistance but promoted recovery. Recovery was only positively affected by species richness in low-productive communities, with most diverse communities even showing overcompensation. This positive diversity effect could be linked to asynchrony of species responses. Our results suggest that a more context-dependent view considering the nature of the climatic disturbance as well as the productivity of the studied system will help identify under which circumstances biodiversity promotes drought resistance or recovery. Stability of biomass production can generally be expected to decrease with biodiversity loss and climate change.