However, their effects are probably accentuated by climatic factors, such as drought and hard winters, or soil imbalances such as soil acidification, which damages the roots.
On rough-weather days of winter when farm folks were forced to remain in the house, someone would ring us and ask Dad to play, and usually it developed into a network affair.
Because each individual is short-lived, the population of an opportunist species is likely to be adversely affected by drought, bad winters, or floods.