HomeMy WebLinkAbout2026 Arrowhead Lake POI Survey Report2026 Arrowhead Lake (DOW: 2700500, Hennepin County)
Aquatic Vegetation Point Intercept Survey Report
4/26/2026
An aquatic vegetation point intercept survey was completed in Arrowhead Lake on 4/26/2026 for
the City of Edina. The point intercept survey consisted of 128 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:
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.
Five species were sampled during the 2026 survey, with curlyleaf pondweed (figure 1) sampled at
4% of sites. Curlyleaf pondweed distribution and abundance was down from previous years. Chara
(figure 2) was the most abundant species sampled, being sampled at 51% of sites. White waterlily
(figure 4) was sampled at only 4% of sites, however, plants were just emerging with just initial
growth.
Species Frequency of Occurrence (%) Average Rake Abundance
Curlyleaf pondweed 4 1
Chara 51 2
White waterlily 4 1
Longleaf pondweed 1 1
Coontail 2 1
Figure 1: 2026 Arrowhead Lake CLP distribution and abundance.
Figure 1: 2026 Arrowhead Lake Chara distribution and abundance
Figure 2: Arrowhead Lake coontail distribution and abundance
Figure 3. Arrowhead Lake white waterlily distribution and abundance
Figure 5. Arrowhead Lake longleaf pondweed distribution and abundance