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January 26,2024 <br /> Don Peterson <br /> Page 12 of 21 <br /> Reference: Water Quality Assessment of Silver View Pond,Mounds View,MN <br /> Silver View Pond <br /> Internal TP <br /> Load-Oxic j <br /> 26% 4 "k <br /> /IOW <br /> 4 {A External TP <br /> Load <br /> 66% <br /> Internal TP - <br /> Load-Anoxic <br /> 8% <br /> Figure 5. Proportion of phosphorus loads from external and internal sources. <br /> Recommendations for Water Quality Improvement <br /> There is not one single management activity that will improve water quality in Silver View Pond, as there <br /> are several factors contributing to poor water quality. The following sections contain recommendations on <br /> management activities that will function to reduce nutrient delivery and/or sediment release in Silver View <br /> Pond to improve water quality conditions. <br /> VEGETATION MANAGEMENT <br /> The aquatic vegetation community in Silver View Pond is fairly diverse and consists of native species. While <br /> the density of plants may be a visual nuisance to some residents, the diversity and composition of species <br /> present provide habitat, food resources for wildlife, and nutrient uptake.Anecdotally, area residents have <br /> reported dense algae growth in Silver View Pond. The data collected this summer along with visual <br /> observations by Stantec staff on multiple occasions indicate that floating-leaved plants like watermeal often <br /> exhibited full surface coverage of the pond, resembling an algae bloom. Chlorophyll-a concentrations in <br /> Silver View Pond are elevated which indicates algae growth in addition to abundant growth of macrophytes. <br /> As mentioned above, removal of aquatic plants in small, shallow ponds can exacerbate growth of algae due <br /> to the increased light availability through the water column. Dense algae growth provides far less ecological <br /> value to wildlife and aquatic organisms than a macrophyte-dominated system. Consequently,we do not <br /> recommend any interventions to manage the submerged aquatic vegetation in Silver View Pond. <br /> Nutrient reduction and mechanical removal are the only options for reducing floating-leaved vegetation. <br /> Given the diverse and quality of existing native species in the submerged plant community, herbicide <br /> treatment to floating-leaved vegetation would not be advised due to the deleterious effects on the native <br /> community in this system. There may be some benefits to skimming the duckweed and/or watermeal from <br /> Design with community in mind <br />