1. General information
Location and description of the intervention
City or FUA
Detroit (FUA)
Region
Northern America
Short description of the intervention
Over the past century, vast portions of the world’s oldest forests have been lost to clear-cutting and managed forestry (1). Arboretum Detroit is working to counter this trend by reforesting Detroit’s urban landscape, transforming abandoned city blocks into thriving groves of trees (1). Each parcel of land features trees that showcase the unique contours and characteristics of specific species, creating a diverse urban forest mosaic across the city (1). These "forest patches" are protected, designed to mature safely for generations, offering a space of tranquility and natural beauty for all Detroiters (1).
Arboretum Detroit’s main goal is to cultivate environmental consciousness, inspiring the community to consider our interconnectedness with nature and our impact on it (1). Through their reforestation mission, they demonstrate the ecological, cultural, aesthetic, and economic value of trees, both locally and globally (1). Trees alter our environment by using their leaves to filter the air we breathe by removing dust and other particles. Deciduous shade trees cool homes in the summer and allow the winter sun to heat homes when they lose their leaves. Trees can serve as a windbreak. The more compact the foliage on the group of trees the more effective the windbreak. Their pilot project, launched on Earth Day 2019, brought these values to life. Volunteers and members planted 21 trees across the site, including species like Princeton Sentry Ginkgo, Redpoint Red Maple, Paper Birch, Cedar, Yew, and understory trees like Kousa Dogwood and Forest Pansy Redbud, enhancing the habitat for local pollinators and birds (2). The trees were arranged in trios, interspersed with native seeds, soil, compost, and glacial boulders to create a healthy and engaging environment for all (2).
Implementation area characterization
Address

5333 Elmwood
Detroit, 48211
United States

Area boundary (map-based)
NBS area image
Source of NBS area image
Source: https://www.arbdetroit.org/latest-news/2019/8/31/celebrating-the-pilot-project-beginning-the-nursery
Area description
Type of area before implementation of the NBS
Timeline of intervention
Start date of the intervention (planning process)
unknown
Start date of intervention (implementation process)
2019
End date of the intervention
2019
Present stage of the intervention
Objectives of the intervention
Goals of the intervention
The objectives of Treetroit were to:
To demonstrate reforesting Detroit’s landscape with diverse tree stands, educating the community on the cultural, ecological, aesthetic, and economic roles trees play locally and globally.
To counteract deforestation through urban reforestation projects.
To restore abandoned lots with diverse tree stands, bringing vitality back to underutilized spaces.
To plant trees that help reduce pollution and support carbon sequestration.
To enhance living tree areas with thoughtful landscape design.
To plant native plants that support local bird populations and pollinators.
To engage in reseeding efforts that sustain the arboretum.
To inspire visitors with a love for trees and a commitment to their stewardship.
To create a natural forest landscape using native plants, effective soil management, and sustainable landscaping practices. (1, 2)
Climate change mitigation: What activities are implemented to realize the conservation goals and targets?
What types of restoration goals are / were defined for the NBS intervention?
What activities are implemented to realize the restoration goals and targets?
Implementation activities and NBS focus
Implementation activities
To contribute to the reforestation of Detroit's urban landscape the Treetroit project engaged in a variety of activities including:

1. Established the non-profit as a land trust (1).
2. Established the first Arb Detroit pilot project called Treetroit at an abandoned property location (2).
3. Hosted an event on Earth Day to initiate the planting for Treetroit (2).
4. Utilized compost and topsoil during planting to support tree growth (2).
5. Selected a diverse mix of trees to plant 23 trees such as Birches, Gingkoes, Red Maples, Cedars, Redbuds, Dogwoods, Yews, Sycamores and the sole Weeping Beech along with a young red pine (3).
6. Spread native wildflower and grass seeds to cover the ground (3).
7. Imported one-hundred cubic yards of soil to create a hill that sweeps through the middle of the Arb (2).
8. Planted 15 boulders (2).
9. Seeded dutch white clover (2).
10. Partnered with the US Fish and Wildlife to plant 46 varieties of native plants that will benefit the local bees and birds (2).
NBS domain and interventions
Ecological domain(s) where the NBS intervention(s) is/are implemented
Parks and urban forests
Pocket parks/neighbourhood green spaces
Amenities offered by the NBS
Services
Expected ecosystem services delivered
Regulating services
Air quality regulation
Carbon storage/sequestration
Pollination
Habitat and supporting services
Habitats for species
Cultural services
Intellectual interactions (scientific and / or educational)
Scale
Spatial scale
Micro-scale: District/neighbourhood level
Beneficiaries
Demographics in implementation area
Treetroit is located in the Poletown East neighborhood in East Detroit. Over 40 percent of the population falls within an older adult age range (4). Over 70 percent of the population identifies as Black (4). Over 50 percent of the households in the area are one-person households with an average household median income of 16,600 USD (4).
Socio-economic profile of the area
Communities vulnerable to environmental hazards or climate change impacts
Yes
Specification of climate or environmentally vulnerable communities
Non-government actors
Non-governmental organisation (NGO) / Civil society / Churches
Citizens or community groups
Primary Beneficiaries
Specify primary beneficiaries
The primary goal of the project is to provide an urban forest to the public and the local community (1-3).
Marginalized groups
Governance
Governance arrangements
Please specify the roles of the specific government and non-government actor groups involved in the initiative
The organization is made up of a 5 team members and 10 board members but there is no specification on how different members are active in the organization (5). Members of the team engage in a variety of roles including: outreach coordinator, and park maintenance (5).
Andrew “Birch” Kemp is the founder of the non-profit organization and plays the big role in initiating tree planting projects (5).

US Fish and Wildlife is a government organization that has become a partner for the project providing native plants and seeds for the planting projects (2).
The pilot project Treetroit was planted during Earth day with the help of local community volunteers (2).
The city of Detroit plays a role by providing the vacant land to the organization to develop the urban forest through a land grant (1).
Key actors - Other stakeholders involved (besides initiating actors)
National government
Local government/municipality
Citizens or community group
Level of citizen and community engagement
Uncommon actors ("Missing actors")
Policy drivers
NBS intervention implemented in response to a Regional Directive/Strategy
Unknown
NBS intervention implemented in response to a national regulations/strategy/plan
Unknown
NBS intervention implemented in response to a local regulation/strategy/plan
Unknown
Mandatory or voluntary intervention
Voluntary (spontaneous)
Enablers & Barriers
Governace and decison-making instruments
Arrangements for governance cooperation
Barriers
Unknown.
Financing
Total cost
Please specify total cost (EUR)
The total cost and finance sources for the project is not publically disclosed.
What is/was the Cost/Budget (EUR) of the NBS or green infrastructure elements?
n/a
Non-financial contribution
Yes
Type of non-financial contribution
Co-finance for NBS
No
Entrepreneurship opportunities
No
Business models
Which of the involved actors was motivated by this model?
Impacts, benefits
Description of environmental benefits
1. Enhanced carbon sequestration: "It is a gift measured in the cubic tons of pollution and carbon scrubbed from our air." (1)
2. Improved air quality: "It is a gift measured in the cubic tons of pollution and carbon scrubbed from our air. " (1)
3. Increased conversion of degraded land or soil: " Since the trees we planted were so large we had to use the bobcat to lower them into the holes. We had actually already used the bobcat to fork out large holes because the clay was so hard and dense. This allowed us to fill the huge hole with compost and topsoil so that the tree can grow in something more than straight clay." (2)
4. Enhanced support of pollination: "They are partnering with us to plant 46 varieties of native plants that will benefit the local bees and birds. We seeded about 75% of the Arb with the seed mix they donated." (2)
5. Increased number of species present: "We planted three each of Princeton Sentry Ginkgo, Redpoint Red Maple, Paper Birch, Cedar, and Yew. We also planted some understory trees that will add spring excitement. We planted two Kousa Dogwood and two Forest Pansy Redbuds. Oh, and last but not least, on the hill we planted a single Weeping Beech." (2)
Environmental impact indicators
Total number of vascular plant species protected or introduced
9 (2)
Description of economic benefits
No specific economic benefits with detailed impacts are mentioned for the project.
Description of social and cultural benefits
1. Improved access to urban green space: "This patchwork of forest laid over the history of city blocks grows a quilt of protected forest that will safely mature in perpetuity for all Detroiters." (1)
2. Increased knowledge of locals about local nature: "A primary goal of Arboretum Detroit is this environmental consciousness; the goal is to be moved to think about our connections to the environment, its effects on us and our effects on it." (1)
3. Increased involvement of locals in the management of green spaces: " Arboretum Detroit will create places for Detroiters to realize their love of trees. This may mean actively planting as an Arb volunteer or just finding one’s favorite tree and sitting with it." (1)
Evidence for use of assessment
Presence of an assessment, evaluation and/or monitoring process
Yes
Actors involved in the assessment, monitoring or evaluation of NBS impacts
Presence of indicators used in reporting
No evidence in public records
Presence of monitoring/evaluation reports
No evidence in public records
Availability of a web-based monitoring tool
No evidence in public records
Name of any specific impact assessment tools
n/a
Use of GIS in mapping impacts
No evidence in public records
Cost-benefit analysis
Unknown
Transparency
Justice
Community satisfaction
Description of locals satisfaction with the project
No public feedback published online.
Trade-offs & Negative impacts
Measures to prevent gentrification or displacement
High-quality & Transformative NBS
Multiple impacts delivery (climate, biodiversity, just community)
Yes
Goal setting and impacts delivery
Yes, from the planning phase the project aimed to address issues in these three key priority areas and it also delivered benefits across these three areas.
Reaching original project goals
Please specify the achievements of the project goals
Climate and Biodiversity Goals:
1. Enhanced carbon sequestration: "It is a gift measured in the cubic tons of pollution and carbon scrubbed from our air." (1)
2. Improved air quality: "It is a gift measured in the cubic tons of pollution and carbon scrubbed from our air. " (1)
3. Increased conversion of degraded land or soil: " Since the trees we planted were so large we had to use the bobcat to lower them into the holes. We had actually already used the bobcat to fork out large holes because the clay was so hard and dense. This allowed us to fill the huge hole with compost and topsoil so that the tree can grow in something more than straight clay." (2)
4. Enhanced support of pollination: "They are partnering with us to plant 46 varieties of native plants that will benefit the local bees and birds. We seeded about 75% of the Arb with the seed mix they donated." (2)
5. Increased number of species present: "We planted three each of Princeton Sentry Ginkgo, Redpoint Red Maple, Paper Birch, Cedar, and Yew. We also planted some understory trees that will add spring excitement. We planted two Kousa Dogwood and two Forest Pansy Redbuds. Oh, and last but not least, on the hill we planted a single Weeping Beech." (2)
Long-term perspective
Yes
Cost-effective solutions
Unknown
Perception of Environmental Change
Unknown
References
1.
Arboretum Detroit (n.d.). Our Vision. [Source link] [Archive];
2.
Arboretum Detroit (2019). Treetroit 1 is Planted. [Source link] [Archive];
3.
Arboretum Detroit (2019). Treetroit 1 - Pilot Arboretum . [Source link] [Archive];
4.
Statistical Atlas (n.d.). Overview of Poletown East, Detroit, Michigan. [Source link] [Archive];
5.
Arboretum Detroit (n.d.). Meet the Team. [Source link] [Archive];
Comments and notes
Public Images
Image
An overview of the project area for Treetroit
5300 Elmwood, Detroit, 48211
Arboretum Detroit
Image
An overview of two people planting a new tree for Treetroit.
Dropping the root ball.
Arboretum Detroit
Image
Treetroit
Treetroit
https://www.arbdetroit.org/treetroit-1
Image
Treetroit
Treetroit
https://www.arbdetroit.org/treetroit-1
Image
Treetroit
Treetroit
https://www.arbdetroit.org/treetroit-1
Image
Treetroit
Treetroit
https://www.arbdetroit.org/treetroit-1