Replacing riverbank ash trees

Researchers at Lake Superior Reserve plant trees

Which species will work best to replace ash trees along the estuary’s banks?DescriptionAgrilus planipennis, commonly known as the emerald ash borer (EAB), is an invasive species from Asia that has been wreaking havoc on North America’s ash trees since the 1990s. EAB infestations eventually kill off more than 99 percent of an area’s ash tree population, and EABs have been … Read More

Testing biological controls on Purple Loosestrife

Research students conduct purple loosestrife research

Can a species of beetle help control this invasive flowering plant?DescriptionPurple loosestrife, Lythrum salicaria, may look pretty, but it is a serious invasive species in Wisconsin, Minnesota and throughout North America. It takes over wetlands and destroys habitat for many native plant and animal species. Wetlands in the Lake Superior Reserve, like those in many places around North America, have … Read More

Rusty crayfish population increase and spread

Research intern throwing rusty crayfish trap into St. Louis River

How is an aggressive invasive crayfish affecting native species?DescriptionThe rusty crayfish, Orconectes rusticus, is an aggressive species of crayfish native to the Ohio River basin that is invading rivers and lakes in the Upper Midwest, including Wisconsin and Minnesota. The rusty crayfish outcompetes native species and has replaced other species in many of Wisconsin’s watersheds, impacting native vegetation and food … Read More