A novel dendrochronological approach reveals drivers of carbon sequestration in tree species of riparian forests across spatiotemporal scales

摘要: Aboveground carbon (C) sequestration in trees is important global C dynamics, but reliable techniques for its modeling highly productive and heterogeneous ecosystems are limited. We applied an extended dendrochronological approach to disentangle the functioning of drivers from atmosphere (temperature, precipitation), lithosphere (sedimentation rate), hydrosphere (groundwater table, river water level fluctuation), biosphere (tree characteristics), anthroposphere (dike construction). Carbon aboveground biomass riparian Quercus robur L. Fraxinus excelsior was modeled (1) over time using boosted regression tree analysis (BRT) on cross-datable characterized by equal annual growth ring patterns (2) across space a subsequent classification (CART) not trees. While Q. responded precipitation temperature, F. also low Danube level. However, CART revealed that governed height parameters vary (magnitude fluctuation groundwater vertical distance mean level, longitudinal upstream end study area). Thus, uniform response climatic only detectable intermediate class taller (>21.8m) sites where table fluctuated little (≤0.9m). The detection depended at lower altitudes above (≤2.7m) along less dynamic downstream section area. Our indicates unexploited opportunities understanding interplay different environmental sequestration. Results may support species-specific locally adapted forest management plans increase dioxide