Land Management
Forested Natural Areas
Project: Amity Forest/Downer Park - Ash Stand Replacement and Buckthorn Removal
Partner: City-led
Timeline: This project will begin in early January 2025. Trail access will be closed temporarily during this time. Smoke will be visible and chainsaws will be used during this time as part of the restoration work.
Description: Using grant funding from a Conservation Partners Legacy Grant, contractors will be restoring a small area of the Amity Creek forest. The City recently acquired this area north of Park Hill Cemetery and hired a consultant to prepare a Native Plant Community Report. This report describes the plant communities found in the area and provides suggestions for managing the site in order to restore the forest community and protect Amity Creek. This report can be found here.
This project involves the following activities:
1.) Cutting approximately 100 ash trees that have died due to Emerald Ash Borer.
2.) Using winter burn piles to burn the dead Ash.
3.) Planting native tree species including Yellow Birch, River Birch, and Swamp White Oak. The Natural Resources Management Program will use this site to gauge the success of species that could best emulate the ecosystem services we will be losing with the loss of our Ash stands. Emerald Ash Borer is present in Duluth, and Ash mortality is nearly 100% once a stand is infested.
4.) Removing buckthorn.
Project: Tree Planting in Mission Creek and Amity Creek Watersheds
Partner: The Nature Conservancy
Timeline: 2024, 2025
Description: The Nature Conservancy planted approximately 100 trees, yellow birch, red oak, and white pine, along the east side of Mission Creek, just north of the Fond du Lac neighborhood. This stretch of Mission Creek was restored in 2019 and we continue to steward the riparian area to ensure that the seed and trees planted along the creek survive and thrive. TNC will plant the other side of Mission Creek in the summer of 2025. Another 100 white pine seedlings, with protective cages, were planted just north of Lester Park. TNC will be planting several more sites in our priority watersheds in 2025.
Project: Under-Ash Planting in St. Louis River Coastal Wetlands
Partner: Minnesota Land Trust
Timeline: Continuing, beginning in 2019
Description: The Minnesota Land Trust is planting native tree species in Ash stands along the St. Louis River. This work is part of the City's continued management of our Designated Natural Areas. All Ash within the City will eventually die due to Emerald Ash Borer, as once this pest infests an area, Ash mortality is nearly 100%. Critical floodplain forest habitat and other ecosystem services will be lost with the demise of Ash, so many organizations are working hard to underplant in Ash stands while the trees are still living. If nothing is intentionally planted within these stands, invasive species such as buckthorn will likely move in and the ecosystem will change from a floodplain forest to scrubby wetland with little habitat value. Follow the link below to read more about this continuing effort.
https://mnland.org/2022/09/30/restoring-coastal-wetlands-for-migrating-birds/
Project: Knowlton Creek Northern White Cedar/Eastern White Pine Forest Management Project.
Partner: W. J. McCabe Chapter Izaak Walton League
Timeline: Continuing, beginning in 2022
Description: In 2022, the local chapter of the Izaak Walton League adopted a forest restoration site along Knowlton Creek to protect water quality and a unique white pine-white cedar forest community. The chapter protects seedlings with fencing or other methods, removes invasive species, and generally tends to the area whenever their members have time.
Project: Tree Seedlings and Planting
Partner: The Rajala Woods Foundation
Timeline: The Foundation plants trees about every year on City lands.
Description: Rajala Woods is devoted to restoring native forests, conserving natural ecosystems and ensuring public access for recreational use and enjoyment. The Foundation grows their own white pine seedlings and generously plants them, with browse protection, for the City at no cost. In the past couple of years, they have been focusing in the Upper Amity Creek/Seven Bridges Road area.
Pollinator Meadows
The City has restored several small areas to pollinator meadows including along the Marten Trail, in Piedmont Park and in Hartley Park. Urban development and pesticide use are causing great stress to pollinator species, so anything we can do to provide habitat in open areas for them will support our larger ecosystem. Once a pollinator garden is planted, continued stewardship including spot spraying or hand pulling weeds/non-natives is necessary for the first few years. The City's Natural Resources Management Program hires contractors to perform this work as funding allows.
After three years of intentional management knocking down weeds to provide space for the natives to grow, the gardens will become somewhat self-sustaining. A common turn of phrase for planting perennial native species is:
- Year 1 - they sleep, focusing energy on its root system;
- Year 2 - they creep, continuing to develop a strong root system, and blooming, but at a fraction of their mature size;
- Year 3 - they leap, growing to its full size, with robust blooms.
Another way to manage native plants is to use prescribed fire. Information on this project can be found in the following section.
Controlled Burns
Pending improved moisture conditions, the City will be conducting two small, controlled burns in the spring of 2024, in order to improve a couple of our many city-managed pollinator gardens. The gardens that we hope to burn this spring are the Sister Cities Park gardens and a small garden in the Wheeler Field Complex. With such a snow-less winter, the threat of wildfire is higher than it has been in decades, so it is only with an abundance of caution that we would proceed with controlled burns this year. The Duluth Fire Marshall works closely with City staff from several departments to ensure that controlled burns are done in only the safest of conditions.
In 2023, the City launched its Prescribed Fire Pilot Program, wherein a licensed contractor, in collaboration with many City staff, used controlled burns on three pollinator meadows - two in Hartley Park and one at the western end of Waabizheshikana: The Marten Trail near Spring Street. Native plants responded well to the burning, and invasives were knocked back in these meadows, allowing for improved habitat for pollinators.
Controlled burning, also known as prescribed burns or prescribed fire, is a land management strategy that uses the application of fire to support healthy ecosystems. Controlled burns provide significant benefits to the landscape and have been used as an intentional land management technique for thousands of years. In this case, the goal of the burn is to reduce undesirable and invasive plants in these meadows, such as purple loosestrife and buckthorn, and encourage the re-growth and vitality of native perennials and grasses, such as little bluestem and black-eyed susan.
The exact timing of burns are unknown until the morning of, as conditions must be ideal and will depend on the temperature, wind speed, and other criteria set forth in a burn plan prepared by the contractor and approved by the Duluth Fire Marshal. Prior to the burn, many steps are initiated including alerting neighboring properties preparing a press release and social media info to post day-of should the burn proceed.
2024 Controlled Burns: Due to the very dry spring we had this year, we only conducted one small controlled burn at a pollinator garden at the Wade/Wheeler Athletic Complex.
This fall, as part of a developing program between the Duluth Fire Department, Parks Maintenance, and Natural Resources, DFD firefighters may conduct a controlled burn near the Arlington Soccer complex. Though funding and program development are still in the works, this inter-departmental collaboration aims to use controlled burns to manage our natural areas while training City firefighters in wildland firefighting techniques. Many wooded areas in our City, especially in eastern Duluth, have a high fuel load present (dead, downed trees) due to storm events over the past several years. Additionally, throughout the City, controlled burns could help eliminate invasives in the forest understory, providing space for native trees to grow.
Strategic Public Lands Re-alignment Project
In 2023, the City will acquire over 2,000 acres (approx. 700 parcels) that were once tax-forfeit lands managed by the County. This multi-year project is funded in part by a Great Lakes Restoration Initiative grant fund from the EPA. Many of these newly-acquired parcels are already being used for public enjoyment and recreation, such as many tracts in the Lester Park and Piedmont areas. However, as tax forfeit property, these parcels could have been sold at any time. Under City ownership, this acreage will be preserved for recreation, as parks or enlarged parks, and as designated Natural Areas. Many City and County staff have been involved in this project including City Planning, Stormwater, Properties, and Parks & Recreation staff. St. Louis County has also been a dedicated partner in the process.
For more information, visit Chapter 2 of the Natural Resources Management Program Plan.
Invasive Species Management
The City is on a seemingly never-ending battle with invasive species, and depending on funding and capacity, we do our best to tackle the myriad invasives that threaten our natural areas. Buckthorn, Honeysuckle, Knotweed, Garlic Mustard and Wild Parsnip are the species of most concern to the City and the following activities are underway to try to address them:
- Sustain Our Great Lakes Grant 2023-2025: This grant focuses on controlling invasive species, specifically buckthorn, in the Hartley Natural Area and Lower Kingsbury restoration area. The Stream Corps Crew from Community Action Duluth is completing this work for the City.
- Duluth Invaders Team: The Duluth Invaders is a group of volunteers who take it upon themselves to help fight invasives in our natural areas and parks. Currently, the City is only able to support these great volunteers at a low level, for example, picking up cut invasives and lending out tools. Hopefully in the future, we will be able to provide more support. The 2024 annual meeting for the Invaders was held at Hartley Nature Center on August 20. New members are welcome, though a waiver form must be completed. This form can be found here: https://forms.duluthmn.gov/Forms/Parks-Voluntary-Waiver
- Contracted invasives control work: The funding and focus for this work varies by year. In 2024, the City re-purposed some GLRI grant funding to treat invasives in our designated natural areas. Other locations where we paid for invasives control work: 1) along lower Mission Creek (tansy), 2) Park Point Dunes (baby's breath), and a west Duluth snowmobile trail where wild parsnip has greatly expanded.
