Long-term changes of surface water in water bodies near Mala Planina as anEcosystem Service
The main aim is to investigate long-term changes of surface water bodies, located in aclose proximity to Mala Planina as an ecosystem service. The studied basins are Aldomirovtsi Marshand Bistritsa Dam. Long-term changes in surface water are crucial for the functioning of ecosystemsand their healthy state. The basis is a global study, dealing with mapping of global surface waterand its long-term changes, applied to a local scale. Changes in global surface water at 30-metreresolution for the past 32 years are quantiﬁed and the indicators taken into account are: wateroccurrence, water occurrence change intensity, water seasonality, annual water recurrence, watertransitions and maximum water extent. The habitat ecosystem service, provided by AldomirovtsiMarsh, is at present, although a decrease of the surface waters is observed. Bistritsa Dam’s surfacewaters are more permanent, providing ﬁsh and development as a place of tourist and recreationcharacter.