Multidimensional responses of ecological stability to eutrophication in grasslands
Chen, Q.; Wang, S.-P.; Borer, E. T.; Bakker, J. D.; Seabloom, E. W.; Harpole, W. S.; Eisenhauer, N.; Lekberg, Y.; Buckley, Y. M.; Catford, J. A.; Roscher, C.; Donohue, I.; Power, S. A.; Daleo, P.; Ebeling, A.; Knops, J. M. H.; Martina, J. P.; Eskelinen, A.; Morgan, J. W.; Risch, A. C.; Caldeira, M. C.; Bugalho, M. N.; Virtanen, R.; Barrio, I. C.; Niu, Y.; Jentsch, A.; Stevens, C. J.; Alberti, J.; Hautier, Y.
Show abstract
Eutrophication usually impacts biodiversity, species composition, and functioning of grassland communities. Whether such effects propagate to influence the stability of these community aspects is unknown. Using standardized experiments across 55 global grasslands, we quantified the effects of nutrient addition on five stability facets (i.e., temporal invariability and resistance during and recovery after dry and wet growing seasons) for three community aspects (i.e., aboveground biomass, community composition, and species richness). Nutrient addition reduced the temporal invariability and resistance of species richness and community composition, but not biomass, during dry and wet growing seasons. Temporal invariability and resistance during, but not recovery after, dry and wet growing seasons were strongly positively correlated in both ambient and eutrophic conditions. This indicates that maintaining and restoring the stability of plant communities requires increasing resistance rather than recovery. Harnessing the complexity of ecological stability provides new insights for grassland ecosystem sustainability in a changing world.
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