Extreme climatic events down-regulate the grassland biomass response to elevated carbon dioxide.

ABSTRACT: Terrestrial ecosystems are considered as carbon sinks that may mitigate the impacts of increased atmospheric CO₂ concentration ([CO₂]). However, it is not clear what their carbon sink capacity will be under extreme climatic conditions. In this study, we used long-term (1998-2013) data from a C3 grassland Free Air CO₂ Enrichment (FACE) experiment in Germany to study the combined effects of elevated [CO₂] and extreme climatic events (ECEs) on aboveground biomass production. CO₂ fertilization effect (CFE), which represents the promoted plant photosynthesis and water use efficiency under higher [CO₂], was quantiffied by calculating the relative differences in biomass between the plots with [CO₂] enrichment and the plo

SUBMITTER: Yuan N 

PROVIDER: S-EPMC6288116 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature