The world is in a biodiversity crisis. Not only is the number of species declining, but the rate at which species appear and disappear from ecosystems, the species turnover, is changing too. How can we determine the rate of species turnover, and how do external (environmental) factors and internal (between-species) forces determine this turnover rate? I am using timeseries data from freshwater ecosystems in Trøndelag, to create statistical models of these patterns in biodiversity both in single ecosystems and between systems. Gaining more knowledge on baseline species turnover and biodiversity patterns will help to take targeted and effective action to conserve biodiversity.
