Tree species drive soil fertility change during the 43 years after plantation - A dual approach (soil sampling and input-output mass balance) study of the Breuil-Chenue common garden experiment (Burgundy, France)
Résumé
A forest ecosystems are generally developed on acidic and nutrient poor soils. In some numerous
areas, elevated acid atmospheric deposition (sulphuric and nitric acids) drastically accelerated soil
and surface water acidification during the XXth century leading, in many cases, to degraded soil
fertility and forest decline. In addition to this context, tree species selection and/or substitution by
forest management (to increase biomass production and/or adapt forests to a changing climate and
its consequences) may have an important effect on the biogeochemical functioning of soils and
ecosystems. Generally, acidification increase under conifers due to: higher atmospheric deposition
rates, higher nitrate leaching fluxes, lower soil pH, higher aluminium concentrations in soil
solutions and reduced organic matter mineralization rates. In such a context, the sustainability of
the fertility of forest soils is at risk and a major concern for the forestry communities. It is therefore
essential to understand the biogeochemical functioning of forest ecosystems and deconvolve
environmental drivers from tree species effect drivers of forest soil fertility change over time.
Using a very unique dataset acquired over the 20 years of monitoring of the common garden
experiment (6 monospecific plots planted in 1976 : Norway spruce, Douglas fir, Nordmann fir,
Beech, Oak and Laricio pine) at the Breuil-Chenue site in Burgundy, France, the objectives of this
study were (i) to quantify the change in plant-available nutrient pools over time (soil resampling
and “input-
Domaines
Science des sols
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BIOGEOMON 2022 10th International Symposium on Ecosystem Behavior.pdf (204.86 Ko)
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