Spring stopover patterns of migrating Whooper Swans (Cygnus cygnus): temperature as a predictor over a 10-year period

摘要: The decision by birds to stop or not (i.e. stopover decisions) during migration can affect their fitness and also the function of ecosystems, as well as, in a detrimental way, agricultural activities grazing, trampling nutrient translocation. We studied how temperature influences pattern large grazing waterfowl. Specifically, we compared variation duration, start end period Whooper Swans (Cygnus cygnus) with temperatures pre-arrival at Lake Tysslingen south-central Sweden 10-year period. day was negatively correlated mean However, did explain Furthermore, duration but This follows observations that is closely linked food supply availability open water other In light our findings, conclude an increased will result spatial temporal shift along route, specific case probably arrive earlier spring consequently stay longer within area. Moreover, prolonged site pressure risk damage crops.