Dreissena polymorpha Limnoperna fortunei 20 Bivalvia 18 Dreissena 10 invasive species 10 South America 8 bivalve 8 Ecological impact 6 Invasive species 6 Limnoperna 6 Animalia 4 Corbicula fluminea 4 Dreissena bugensis 4 Europe 4 Geographic spread 4 Invertebrata 4 Mollusca 4 Parana River 4 algae 4 biological invasion 4 colonization 4 ecological impact 4 mollusc 4 predation 4 Acclimatization 2 Alien 2 Animals 2 Aquatic invader 2 Aquatic nuisance species 2 Aves 2