Recovery of photosynthetic capacity in Scots pine: a model analysis of forest plots with contrasting soil temperature

摘要: Both aboveground and belowground climate affects net primary production (NNP) forest growth. Little is known about how above factors interact. The BIOMASS-model was tested to simulate photosynthetic recovery over a wide range of soil temperatures created by snow cover manipulations on tree-scale plots in 20-year-old Scots pine stand northern Sweden. differences timing warming between the covered span two months. Carbon assimilation needles, sap flow, needle water potential climatic parameters were measured field. simulations revealed that an early start gave relatively 7.5% increase NPP. Late delayed reduced NPP 13.7%. This indicated temperature needed be accounted for, as well air temperature, when analysing boreal environment. effects reflected simulated recovery. model did not fully capture delay caused late warming. It possible integrate complexity into threshold date for thaw, using sapflow measurements together with information day degree sum, long availability limiting uptake roots. Although more realistic mechanism than currently BIOMASS desirable change shifts typical patterns interplay dynamics.