sentences:  It was once believed that this occurs mostly in very windy areas.But it has been found that it happens even in areas with moderate winds, so that wind-induced signal were found to be a major ecological factor.Trees have a particularly well-developed capacity to reinforce their trunks when exposed to wind .From the practical side, this realisation prompted arboriculturalists in the UK in the 1960s to move away from the practice of staking young amenity trees to offer artificial support.