sentences:  In the Bronze Age and early part of the Iron Age, extreme pressure was exerted on the limited tree species growing on Stora Alvaret and its margins.Jannson suggests that this disappearance of trees caused a mysterious evaporation of humans about 500 AD which is documented at Eketorp and other sites.It is thought provoking to imagine that the expanded human population may have exceeded its carrying capacity of this place by about 500 AD.