期刊
ECOLOGY LETTERS
卷 17, 期 4, 页码 435-444出版社
WILEY
DOI: 10.1111/ele.12243
关键词
water use efficiency; Rao's quadratic entropy; gross primary productivity; plant species richness; Jena Experiment; Ecotron; biodiversity-ecosystem functioning; Apparent quantum yield; nitrogen use efficiency; net ecosystem productivity
类别
资金
- DFG [FOR 456]
- ProExzellenz initiative of the German Federal State of Thuringia
- SNF [315230E-131194]
- CNRS-TGIR
- CNRS-INEE
- Languedoc-Roussillon region
- Herault Conseil General
- Swiss National Science Foundation (SNF) [315230E-131194] Funding Source: Swiss National Science Foundation (SNF)
Little is known about the role of plant functional diversity for ecosystem-level carbon (C) fluxes. To fill this knowledge gap, we translocated monoliths hosting communities with four and 16 sown species from a long-term grassland biodiversity experiment ('The Jena Experiment') into a controlled environment facility for ecosystem research (Ecotron). This allowed quantifying the effects of plant diversity on ecosystem C fluxes as well as three parameters of C uptake efficiency (water and nitrogen use efficiencies and apparent quantum yield). By combining data on ecosystem C fluxes with vegetation structure and functional trait-based predictors, we found that increasing plant species and functional diversity led to higher gross and net ecosystem C uptake rates. Path analyses and light response curves unravelled the diversity of leaf nitrogen concentration in the canopy as a key functional predictor of C fluxes, either directly or indirectly via LAI and aboveground biomass.
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