freshwater mussels, aquatic bivalve mulluscs unionoida.

abstract and aquatic background bank bio biology bivalve bottom buttons catastrophe chaos chaotic coastline contamination creek dead death disaster diversity dnieper ecology ecosystem extinct freshwater heelsplitter inhabitant lake lifeless margaritiferidae monophiletic mulluscs mussels nacre nature pearl pebble pebbles pollution river riverlife scattered sea seashore seaside shell shellfish shells stones stream surf ukraine unionoida water wave wildlife winter