Complex sentence: Overall, ectomycorrhizal fungi show high metal constitutive tolerance with many species being able to survive in toxic and non toxic environments, however there are cases of populations locally adapted to tolerate harsh chemical environments.
Split into simpler sentences: Overall, ectomycorrhizal fungi show high metal constitutive tolerance with many species being able to survive in toxic and non toxic environments. However there are cases of populations locally adapted to tolerate harsh chemical environments.