Increasing net ecosystem biomass production of Canada's boreal and temperate forests despite decline in dry climates

摘要: Repeated measurements of tree biomass at field plots describe recovery from disturbances, sampling artifacts, and potential effects environmental change on forest ecosystems. Challenges in differentiating between intrinsic extrinsic sources variation, both theory practice, continues to confound claims an anthropogenic carbon sink biomass. Here, we analyzed observations 10,307 across southern ecozones Canada investigate temporal trends stand-level growth (G), loss due mortality (M), net ecosystem production (NEBP) intact stands. Net forcing (Fex) was expressed by the collective dependence fluxes climate anomalies, nitrogen deposition (N), atmospheric dioxide concentration (C). Inferences drawn directly linear mixed model coefficients only reflect static behaviour specifically plot locations. We, therefore, defined a dynamic landscape-scale (Fex′), which additionally accounted for negative feedback responses enhancement. Simulations were performed over 1501-2012 estimate Fex′. Overall, Fex′ positive, suggesting that changes drove 90 percent increase NEBP. The NEBP confined wet regions, while dry regions decreased, large expanses northern forests, historically located near boundary climates, may be high risk decline under continued increases evaporative demand. These results have important implications greenhouse gas balance Canada's sector.