The Mystery of Disappearing Wild Rice
Spur Lake in Oneida County, Wisconsin was once known for its dense stands of wild rice (Ojibwe: manoomin). Local Ojibwe elders recall that "wild rice once grew so thick on the lake, you couldn't see the water from shore." But something has changed...
The Disappearance of Wild Rice
Since 1987, scientists and local residents have watched as wild rice in Spur Lake has slowly disappeared. This website presents data showing this decline over time. As you explore, you'll discover what happened to this important plant and the lake ecosystem.
Wild Rice Coverage in Spur Lake (1987-Present)
Data sources: Wisconsin DNR, Great Lakes Indian Fish & Wildlife Commission, historical surveys. Some data points are approximations.
Key Facts About the Decline
- In the 1980s, wild rice covered 80-100 acres of the 113-acre lake
- By the mid-1990s, coverage occasionally dropped to only a few acres
- After 2004, wild rice almost completely disappeared from the lake
- By 2009-2010, Spur Lake had no naturally harvestable rice at all
Investigate the Causes
What happened to Spur Lake's wild rice? Scientists have identified four major factors that could explain this dramatic change. Your task is to examine the evidence for each cause.
Cause 1
Cause 2
Cause 3
