But all trees have different behaviour in this two parts of the island? If yes, the difference of microclimate could be due to winds that blow always in only one direction....for instance on the Canary Islands the winds called "Alisei" blow from North-est to South-west....if the island is divede by a mountain (as for Tenerife or La Gomera) the Side North-Est is more humid and cold than the south west side..