HomeMy WebLinkAbout2024 Mirror Lake POI Survey Report2024 Mirror Lake (DOW: 27005500, Hennepin County) Aquatic Vegetation Point Intercept Survey Report
4/13/2024
An aquatic vegetation point intercept survey was completed in Mirror Lake on 4/13/2024 for the City of Edina. Three species of vegetation were sampled during the survey:
Curlyleaf pondweed
Coontail
Elodea canadensis
The point intercept survey consisted of 95 points. At each site depth was recorded and vegetation was sampled with a double-sided rake. For every species sampled, an abundance rating
was assigned based on how much was sampled on the rake. The ratings are as follows:
Plant species absent
Plant species covers <25% of the rake
Plant species covers 25-75% of the rake
Plant species covers >75% of the rake
This rating scale was taken out of the Minnesota Department of Natural Resources Guidance for Delineating Aquatic Plants for Management.
Curlyleaf pondweed was the most abundant plant species in Mirror Lake (See figure 1). It was found at 18 sites (frequency of occurrence: 19%) with an average rake abundance of 1.6 at
sites where it was collected. The sites where curlyleaf pondweed was found ranged in depth from 2 - 4ft. It was most abundant in the northwest section of the lake.
Coontail was found at 5 sites (frequency of occurrence: 5%) with an average rake abundance of 1 at the sites where it was collected (See figure 2).
Elodea canadensis was found at 4 site (frequency of occurrence: 4%) with an average rake abundance of 1 at the sites where it was collected.
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Figure 1: Mirror Lake curlyleaf pondweed distribution and abundance
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Figure 2: Mirror Lake coontail distribution and abundance
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Figure 3: Mirror Lake Elodea canadensis distribution and abundance