The end of the lake-dwellings in the Circum-Alpine region

After more than 3500 years of occupation in the Neolithic and Bronze Age, the many lake-dwellings around the Circum-Alpine region ‘suddenly’ came to an end. Throughout that period alternating phases of occupation and abandonment illustrate how resilient lacustrine populations were against change: cultural/environmental factors might have forced them to relocate temporarily, but they always returned to the lakes. So why were the lake-dwellings finally abandoned and what exactly happened towards t