Increasing Biodiversity in Prairies

Prairie once covered 1/3 of Minnesota. Today only a little more than 1% of native prairie remains. Prairie is a key habitat for 34 Species in Greatest Conservation Need (SGCN) and for many at-risk pollinators in Minnesota. It is important to maintain and enhance the little prairie that is remaining to help out these important species. Anoka County Parks maintains prairie habitat on County land with prescribed burns every 3 to 5 years. ACD helped manage weeds before the scheduled burns and overseeded a custom seed mix for each site after the burns. The native seed mixes contain species that are minimally present or not present at all the prairie units. Species that benefit at-risk pollinators were included in the mixes. The goal is to enhance the prairies by reducing non-native weeds and increasing native biodiversity. 

Pre-burn, August 2022, showing weedy hoary alyssum. ACD conducted weed control in 2023
Sally, ACD Seasonal District Technician, assisted Anoka Parks and Red Rock Fire with the Pasture Unit prescribed fire earlier this fall and is pictured here seeding on bare soil.

Bunker Hills Regional Park Pasture Unit includes a wetland depression surrounded by dry prairie. Site preparation involved controlling non-native woody encroachment and monoculture patches were sprayed or mowed. ACD overseeded following a prescribed burn in the fall. The seed mix contained 41 different forb species and 5 different grass species. A mix of wildflowers provided pollen and nectar sources for several endangered species of Bumble Bees. For more information contact Carrie Taylor, Restoration Ecologist, This email address is being protected from spambots. You need JavaScript enabled to view it. 

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Scouts Rehabilitate Rain Garden

A rain garden at the Coon Lake Beach Community Center needed a little help. Originally constructed in 2015, maintenance had reached a point where a group effort was needed to reclaim the garden from weeds and silt overload. The Community Center leaders enlisted a local boy scout troop, their parents, and ACD to help.

The rain garden has an important function in the neighborhood as it is positioned near the bottom of a hill to collect street runoff. Instead of going into the lake at the bottom of the hill, the water and associated pollutants are treated by infiltration. The reduction in volume of water running towards the lake also helps alleviate shoreline erosion in specific problem spots.

In one-hour the scouts completed several renovations to bring back much of the original beauty and function. They removed four trailer loads of invasive trees including many thorny black locust. They removed sediment that had collected and was damming the rain garden entrance. Rocks and retaining walls were cleared of debris, leaving the garden with a more formal appearance and ready for the next rainfall. Great job scouts! 

September 2017 - Two years after installation
August 2023 - Overgrown with weedy vegetation
Rehabilitation work
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Linwood Township Adopts Septic System Point of Sale Ordinance

With funding assistance from the Anoka Conservation District, Linwood Township is taking new steps to ensure local lakes, streams and groundwater are protected. The township is beginning implementation of an ordinance requiring septic system inspections before property ownership transfer. The goal is to ensure septic systems are functioning properly because a failing septic can be both a human health and an environmental threat.

All homes and businesses in Linwood Township, except for a trailer park, have their own septic system. The costs for maintenance and repair fall entirely on the owner. Replacing the system can be costly, at over $10,000. Many homeowners would struggle with this kind of cost. Property sale is one of the few times that funds may be available to address a failing septic system. The ordinance also helps protect buyers from a large liability.

In addition to this new ordinance, Linwood also tracks septic system pumping and reminds homeowners when it is due. In this way, the township is able to remind homeowners of this important maintenance that helps avoid more costly problems. Many other communities in Anoka County also take similar measures.

Photo: Septic System Maintenance Pumping

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