Statistical analyses
We used ANOVA and Tukey’s multiple comparison test to examine if the algal growth rate, C biomass, and C, N, and P cell quotas were significantly different among the control treatments prepared from the leaf litter leachates of 11 tree species. We also tested for the algal response to micronutrient amendment in each leaf litter leachate using Student’s t -test. These analyses were performed using functionsaov , TukeyHSD , and t.test in the R ver. 4.2.2 . We examined the effects of TDN and TDP on the algal growth rate and C biomass by the segmented linear regression model using functionslm and segmented in package segmented in the R ver. 4.2.2 .