This is a spatial database of key aquatic invasive species (AIS) invasions within the state of Michigan, which aims to improve coordination among resource managers, raise stakeholder awareness, and enhance AIS prevention and control measures. A spatial data layer for some of the major AIS of concern within Michigan waters is presented below. These species include round goby (Neogobius melanostomus), ruffe (Gymnocephalus cernuus), purple loosestrife, (Lythrum salicaria), sea lamprey (Petromyzon marinus), zebra mussel (Dreissena polymorpha), quagga mussel (Dreissena bugensis), spiny waterflea (Bythotrephes cederstroemi) and Eurasian watermilfoil (Myriophyllum spicatum). Other information is provided for additional species. Various agencies and organizations provided these data.
Time series maps are also provided which show the spread of each species and/or accumulation of data over time from earliest dates available to the present. Local AIS information specific to either county or watershed for six species (sea lamprey, ruffe, round goby, purple loosestrife, zebra mussel, and quagga mussel) is also available which shows year of data collection and waterbody/location of the occurrence. Lastly, data downloads can be executed to provide users with GIS data layers, database files used to create the maps on these pages, and quick facts about each species of concern.
Absence of data does not imply absence of invasive species.