Drastic changes of the amphipod fauna in northern Germany and the displacement of <i>Gammarus lacustris</i> G.O. Sars, 1864 to relict habitats/status

The amphipod fauna of Central Europe has changed dramatically over the last century. This change increased past 30 years. dynamic is well documented in northeast Germany. study places it a landscape-ecological context. An example displacement Gammarus lacustris G.O. Sars, 1864, circumpolar species with variety habitats, but relegated to relic habitats. turns out be very weak competitor. Already immigration roeselii Gervais, 1835 (probably 1960s), became Massive waves introduction Pontocaspian genera Dikerogammarus , Pontogammarus and Echinogammarus few decades later intensified this process for other species.