Details of the branch production sampling.

Branch production sampling details for the studied species Ailanthus altissima, Robinia pseudoacacia and Populus alba: origin of the species (I-invasive, N-native); year of sampling, tree sex (in the case of dioecious species), number of sampled trees and branches per tree, mean±SE of trunk diameter at breast height (DBH), and dates of branch collection for each peak of organ production.