HomeMy WebLinkAbout01_2025 Highland Lake POI Survey Report2025 Highland Lake (DOW: 27066800, Hennepin County)
Aquatic Vegetation Point Intercept Survey Report
4/26/2025
An aquatic vegetation point intercept survey was completed in Highland Lake on 4/26/2025 for the
City of Edina. The point intercept survey consisted of 73 points. A meandering delineation was also
performed to detect any additional curlyleaf pondweed not in the proximity of a site. 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:
0. Plant species absent
1. Plant species covers <25% of the rake
2. Plant species covers 25-75% of the rake
3. 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.
1 2 3 Frequency Avg. Rake Abundance
Curlyleaf Pondweed 11 2 0 19 1.2
Slender Waterweed 19 12 18 67 2
Common Waterweed 2 0 1 4 1.7
Coontail 10 3 8 29 1.9
Flatstem Pondweed 1 0 0 1 1
Nitella spp 7 1 3 15 1.6
Chara spp 1 0 0 1 1
Curlyleaf pondweed was sampled at 19% of the 73 sites. It was not abundant where it was sampled
with an average rake abundance of 1.2. No sites had rating above 2; most sites had a rating of 1. The
healthy native plant community in Highland Lake may have been keeping curlyleaf pondweed
abundance down.
Slender waterweed was the most abundant species sampled at 67% of sites. The average rake
abundance was 2. Common waterweed was also sampled during the survey with, however, less
abundant (FOO-4%, Rake Abundance-1.7).
Coontail was also abundant being sampled at 29% of sites with and average rake abundance of 1.9.
Figure 1: 2025 Highland Lake curlyleaf pondweed distribution and abundance
Figure 2: 2025 Highland Lake slender waterweed distribution and abundance
Figure 3: 2025 Highland Lake coontail distribution and abundance
Figure 4: 2025 Highland Lake Nitella spp. distribution and abundance