Dear Nicklas, your project & results are very interesting. Would you like to do a same in the Carpathians? Here are also old oak trees of the species: Q. robur, Q. petreae, Q. pubescens, Q. cerris. See more here: Book Habitats of Natura 2000 in the Transcarpathian Lowland
Geographically, this part of the Carpathians is located between Swedish and Turkish sites in the middle.