1. Risk Assessment for Lakes
AIS · Aquatic Invasive Species Education for Beltrami County
Risk Assessment for Lakes
Where could Zebra mussels invade?

2. Answer Guide Study Site: Lake Bemidji Risk of infestation: High Why:
The water chemistry is favorable to optimal growth
It has hard substrates for zebra mussel attachment (gravel, cobble, rocks)
It is upstream from Cass Lake, which is infested
It is connected to many other lakes (26 upstream lakes)
It is a heavily used lake with many lake accesses
AIS · Aquatic Invasive Species Education for Beltrami County

3. Answer Guide Study Site: Cass Lake Risk of infestation: Infested Why:
The water chemistry is favorable to optimal growth
It has hard substrates for zebra mussel attachment (gravel, rocks)
It is a heavily used lake with many lake accesses
It is connected to other lakes
AIS · Aquatic Invasive Species Education for Beltrami County

4. Answer Guide Study Site: Benjamin Risk of infestation: Low Why:
The water chemistry is not favorable to optimal growth
It has no upstream lakes
It is not connected to many other lakes
It is not heavily used
AIS · Aquatic Invasive Species Education for Beltrami County

5. Answer Guide Study Site: Wolf Lake Risk of infestation: High Why:
The water chemistry is favorable to optimal growth
The substrate is suitable for attachment (gravel, cobble, rocks)
It is connected to many other lakes, (33 upstream lakes)
It is upstream from Cass Lake, which is infested
AIS · Aquatic Invasive Species Education for Beltrami County