Grand Sable Dunes temporary closure to all public entry for visitor safety
Grand Sable Dunes are rapidly eroding into Sable Creek and Lake Superior. The area from the Ghost Forest Trail north to Lake Superior then along the shoreline to the west side of Sable Creek is temporarily closed. Follow closure signs for your safety. More »
Insects and Their Relatives
The many terrestrial and aquatic environments at Pictured Rocks National Lakeshore offer great habitat where creeping, crawling and buzzing creatures can live and breed. Insects (along with their arthropod relatives the spiders, millipedes, mites and tiny aquatic zooplankton) make up the bulk of the park's animal life.
The important role of insects is clear to scientists. Bees, flies, and other insects function as pollinators, and scavengers like beetles break down dead plant and animal matter. High numbers of many species such as mosquitoes provide food for bats and other hungry creatures. Insect monitoring at the lakeshore has primarily focused on aquatic insects and larvae as they are good indicators of water quality. The presence of mayfly, stonefly and caddisfly larvae in the lakeshore's cold fast-flowing streams indicate that these waters are in good ecological health.
Pictured Rocks is one of several parks involved in a regional NPS study to detect the presence of mercury in aquatic environments by sampling dragonfly larvae. Information from this study will help scientists understand how mercury in northern lakes spreads throughout the aquatic food web.
photo by Richard Orr
What's on that leaf?
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Did You Know?
Pictured Rocks National Lakeshore is America's first National Lakeshore, authorized on October 15, 1966. On the same day, President Lyndon B. Johnson also signed into law another piece of landmark legislation -- the National Historic Preservation Act. More...