Odonata Assemblages in Anthropogenically Impacted Habitats in the Drava River—A Long-Term Study

Lotic freshwater ecosystems are among the most threatened worldwide due to effects of multiple stressors, such as intensive land use in their catchments, morphological alterations, flow regulation, pollution, and climate change. Odonata often used valuable indicators ecological integrity anthropogenic disturbance habitats. Here, we present results a study on assemblages anthropogenically impacted habitats (hydropower plant reservoirs, tailrace canals, drainage ditches, old river channels) conducted over nine-year period. The negative impacts activities inhabiting biota were confirmed—with only 11 species recorded, species-poor had low population densities. Although recorded generalists, some national conservation concern detected. Among physico-chemical water parameters, concentrations ammonium, orthophosphates, nitrates, mineral oils found be important determinants assemblages. preservation near-natural sites vicinity man-made is for maintaining local fauna rare species. Our highlight importance long-term data determining occurrence monitoring dynamics.