Key points R SH responds differently than NPP to fertilization and drought treatments leading to the divergent responses of NPP and NEP Moderate responses of NPP 11 and R SH 7 to fertilization combined such that NEP increased nearly threefold in ambient control and 43 under droug ID: 1026421
Download Presentation The PPT/PDF document "Heterotrophic Respiration and the Diverg..." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
1. Heterotrophic Respiration and the Divergence of Productivity and Carbon SequestrationKey pointsRSH responds differently than NPP to fertilization and drought treatments, leading to the divergent responses of NPP and NEPModerate responses of NPP (+11%) and RSH (−7%) to fertilization combined such that NEP increased nearly threefold in ambient control and 43% under drought treatment13% decline in RSH under drought led to a 26% increase in NEP while NPP was unaltered. Such “drought benefit” for carbon sequestration was nearly twofold in control, but disappeared under fertilization. Carbon sequestration efficiency, NEP:NPP, varied twofold among sites, and increased up to threefold under both drought and fertilization.Noormets et al. 2021 GRLSite and treatment differences in total and belowground NPP, and heterotrophic and autotrophic fractions of soil CO2 effluxSite and treatment differences in net ecosystem production and carbon sequestration efficiencyPINEMAP – Pine Integrated Network: Education, Mitigation, and Adaptation project:Experimental throughfall reduction and fertilizationTriplicated across the range of loblolly pine4 years