Germany / Netherlands / Estonia / Northern Ireland / Latvia / Sweden / New Zealand / Poland / Norway / Belgium / Russia / United States / Canada / Australia / United Kingdom / Lithuania / Scotland / Finland / Ireland / Denmark / /
Event
Environmental Issue / /
Facility
Swedish Museum of Natural / Swedish Museum of Natural History / /
Movie
Male and female / /
MusicGroup
Udora / /
NaturalFeature
Gulf of Bothnia / Lake Mälaren / /
Organization
Ruhr-Universität Bochum / Ulster Museum Sciences Division / Department of Ecology / Natural Resources Conservation Service / /
Person
Martin Naylor / Thomas Nuttall / Alien Species (Nobanis) / Brede Waterpest / Hydrilla / /
Canadian waterweed (Elodea canadensis) Nuttall’s waterweed (Elodea nuttallii) Photos © Armin Jagel, www.botanik-bochum.de