Fig. 2: Nutrients concentration in litter with annual progression of the outbreak.
From: Defoliation-induced changes in foliage quality may trigger broad-scale insect outbreaks
Fitted relationship for nitrogen (a), phosphorus (b), and potassium (c) concentrations (g kg−1) with time (calendar years) and stand composition for different litter types. Shaded areas indicate 95% confidence intervals. Slopes significantly different from zero are represented by an asterisk and letters compare slopes among stand composition, separately for each litter type. Linear mixed-effects models were fitted using a total sample size of 1360 observations.
