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Data from: Drought-exposure history increases complementarity between plant species in response to a subsequent drought

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posted on 2022-04-25, 02:46 authored by Yuxin ChenYuxin Chen, Anja Vogel, Cameron WaggCameron Wagg, Tianyang Xu, Maitane Iturrate-Garcia, Michael Scherer-Lorenzen, Alexandra Weigelt, Nico Eisenhauer, Bernhard Schmid

  

Growing threats from extreme climatic events and biodiversity loss have raised concerns about their interactive consequences for ecosystem functioning. Evidence suggests biodiversity can buffer ecosystem functioning during such climatic events. However, whether exposure to extreme climatic events will strengthen the biodiversity-dependent buffering effects for future generations remains elusive. We assess such transgenerational effects by exposing experimental grassland communities to eight recurrent summer droughts vs. ambient conditions in the field. Seed offspring of 12 species are subsequently grown individually, in monocultures, or in 2-species mixtures; and subjected to a subsequent drought event in the glasshouse. Comparing productivity between mixtures and monocultures, drought-selected plants show greater between-species complementarity than ambient-selected plants when recovering from the subsequent drought, causing stronger biodiversity effects on productivity and better recovery of drought-selected mixtures after the drought. These findings suggest exposure to recurrent climatic events can improve ecosystem responses to future events through transgenerational reinforcement of species complementarity.

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