期刊
GLOBAL CHANGE BIOLOGY
卷 27, 期 11, 页码 2441-2457出版社
WILEY
DOI: 10.1111/gcb.15583
关键词
drought; ecosystem; functional group; grassland; nutrient; Nutrient Network (NutNet)
资金
- National Science Foundation Research Coordination Network program [NSF-DEB-1042132]
- National Science Foundation Long Term Ecological Research program [NSF-DEB-1234162, NSF-DEB-1831944]
- Institute on the Environment [DG-0001-13]
- Fund for Scientific Research (FWO), Flanders (Belgium)
- Academy of Finland [253385, 297191]
- Regional Council of Ile-de-France under the DIM Program R2DS bearing [I-05-098/R]
- program Investissements d'Avenir [ANR-11-INBS-0001 AnaEE France, ANR-10-IDEX-0001-02 PSL]
- German Ministry for Education and Research (BMBF) [FKZ 031B0516C]
- FCT [UID/AGR/00239/2019]
- Academy of Finland (AKA) [297191, 297191] Funding Source: Academy of Finland (AKA)
Nutrient addition can exacerbate the detrimental effects of drought on aboveground biomass production in grassland communities, with different responses observed among functional groups.
Droughts can strongly affect grassland productivity and biodiversity, but responses differ widely. Nutrient availability may be a critical factor explaining this variation, but is often ignored in analyses of drought responses. Here, we used a standardized nutrient addition experiment covering 10 European grasslands to test if full-factorial nitrogen, phosphorus, and potassium addition affected plant community responses to inter-annual variation in drought stress and to the extreme summer drought of 2018 in Europe. We found that nutrient addition amplified detrimental drought effects on community aboveground biomass production. Drought effects also differed between functional groups, with a negative effect on graminoid but not forb biomass production. Our results imply that eutrophication in grasslands, which promotes dominance of drought-sensitive graminoids over forbs, amplifies detrimental drought effects. In terms of climate change adaptation, agricultural management would benefit from taking into account differential drought impacts on fertilized versus unfertilized grasslands, which differ in ecosystem services they provide to society.
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