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Basal Area Growth of Sugar Maple in Relation to Acid Deposition, Stand Health, and Soil Nutrients

Direction de la recherche forestière, Forêt Québec, ministère des Ressources naturelles du Québec, 2700, rue Einstein, Sainte-Foy, QC, Canada G1P 3W8

View larger version (36K): [in a new window]   Fig. 1. Location of the Forest Ecosystem Research and Monitoring Network (Réseau d'étude et de surveillance des écosystèmes forestiers [RESEF]) study plots.

View larger version (18K): [in a new window]   Fig. 2. Typical example (Plot 102) of sugar maple tree-ring increment and basal area increment (BAI) chronology. The dotted line corresponds to the suppression period, leaving linear trend of BAI associated to tree release.

View larger version (36K): [in a new window]   Fig. 3. Average unstandardized basal area chronology of sugar maple for deciduous Forest Ecosystem Research and Monitoring Network (Réseau d'étude et de surveillance des écosystèmes forestiers [RESEF]) study plots in Québec after removal of the suppression period, and associated linear growth trend since 1960. Early parts of series (dotted line) represent the reduced number of cores.

View larger version (19K): [in a new window]   Fig. 4. Average basal area increment (BAI) trend of dominant and codominant trees since 1960 as a function of (a) exchangeable acidity and (b) base saturation of the forest floor in 14 sugar maple stands.