Aquatic invasive species have come to Wisconsin from various places and by through a variety of mechanisms. Some of these species, like the common carp, were intentionally introduced to the Yahara Lakes, while others, like the spiney waterflea, were unintentionally brought into the system.
Eurasian Water Milfoil (Myriophyllum spicatum) is a submersed aquatic plant native to Europe, Asia and northern Africa. It is one of eight milfoil species found in Wisconsin and the only one non-native to the state. It first showed up in Wisconsin's counties in the 1960's and in the past three decades, has expanded its range to about 310 lakes including all of the lakes in the Yahara Watershed.
Problems associated with this invader