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Risk Assessment for Lakes

AIS · Aquatic Invasive Species Education for Otter Tail County. Risk Assessment for Lakes. Where could Zebra mussels invade?. Answer Guide. Study Site : Otter Tail Lake Risk of infestation : High, likely Why : The water chemistry is favorable to optimal growth

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Risk Assessment for Lakes

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

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

  3. Answer Guide • Study Site: West Battle Lake • Risk of infestation: Moderately high • 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 Otter Tail County

  4. Answer Guide • Study Site: Big Pine Lake • Risk of infestation: High, likely • Why: • The water chemistry is favorable to optimal growth • It has hard substrates for zebra mussel attachment (gravel, rocks) • It is downstream from Rose Lake, which is infested already • It is connected to many other lakes • It is a heavily used lake with many lake accesses AIS·Aquatic Invasive Species Education for Otter Tail County

  5. Answer Guide • Study Site: Dead Lake • Risk of infestation: Moderate • Why: • The water chemistry is favorable to optimal growth • The substrate is not as suitable for attachment (softer lake bottom with lots of plants) • It is connected to many other lakes AIS·Aquatic Invasive Species Education for Otter Tail County

  6. Answer Guide • Study Site: Middle Leaf Lake • Risk of infestation: Low • Why: • The water chemistry is favorable to optimal growth • The substrate is not as suitable for attachment (softer lake bottom with lots of plants) • It is not connected to any other lakes (except East and West Leaf Lakes) • It is not a heavily used lake AIS·Aquatic Invasive Species Education for Otter Tail County

  7. Answer Guide • Study Site: Poplar and Gunflint Lakes • Risk of infestation: Low • Why: • The water chemistry is not favorable to optimal growth • They are not near any other zebra mussel infested lakes • Poplar Lake is not connected to many other lakes AIS·Aquatic Invasive Species Education for Otter Tail County

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