Dear All,

I am doing isotopic analyses using SIAR package in R. In my case, I want to quantify the contribution of soil moisture at shallow, middle and deep layers to xylem water for three species. I tried to do ANOVA and post-hoc anlysis to characterize the difference between species in contribution of sources at each layer. I got the results but I doubt the results because it indicated very significant difference (***) existed between species. But from the figure showing the contribution of sources, it seems there is no significant difference. I attached my data and codes. Please check the codes for me because I guess there is some wrong with codes? Thanks for any help in advance. 

Xiaodong Gao