Tag: urban forestry

  • Memorials & Trees

    Memorial Day commemorates the sacrifices of service members. According to the National Cemetery Administration, it began after Major General Logan issued the ‘Memorial Day Act’ in 1866 to remember fallen soldiers after the American Civil War and a day to decorate their memorials with flowers and other mementos.

    However, this day has started including those who haven’t served in the military. Many communities use this day to visit graves of their loved ones.

    Why do we use plants to honor the dead?

    Many plants follow the same seasons, literally and metaphorically, as humans: we’re born, we live, we rest, we may have offspring, we hold roles in our communities, we pass away.

    In the spring, we awake after a long, cold winter. In the summer, we grow–reaching peak fullness in early autumn when we return to deep rest in the winter. While each part of the world varies, we can affirm that this cycle has existed for all life for time immemorial.

    All of our lives are tied to the green world around us. It’s a natural thing to live a life and honor that experience through the beings that are always near us, bringing childlike joy and wonder to everyday living, including the end of our loved ones lives.

    Why are trees so popular as memorials?

    Trees are arguably one, if not the most, ‘charismatic megaflora’ on Earth. In other words, beings that are so impressive to the naked eye that it provokes an emotional reaction; we physically look up to them and frequently care for them as family members.

    Long-lived species like oaks offer a way to commune with our loved ones long after their passing. Trees give protection from harsh rays, cool our homes, live for many human generations, provide food and shelter for innumerable species, serve as a keystone connection to ecological habitat and are a constant physical reminder honoring those that have passed.

    Humans & Trees

    Humans and trees are more alike than folks may realize. While physically, we may differ, we have been in relationship with our tall, woody friends for a very long time.

    One could say that we heal trauma and damage similarly through compartmentalization that occurs faster near new growth, and find resilience in where we are planted.

    All trees may have similar forms and structure (in the sense that they have secondary growth as woody material), but not all species of trees are directly related to each other or even have common ancestors. This is a scientific phenomenon called convergent evolution.

    How incredible is it that that so many different beings that have differ in community roles end up sharing similar traits even though they aren’t ‘actually’ related? It kind of sounds human, doesn’t it?

    How do I choose a tree as a memorial?

    This can be a hard question as it becomes more complicated depending on exactly the answer you’re looking for.

    We can separate the following advice into three different categories for the folks that will be assisting you during this difficult time: your arborist, the funeral director and a spiritual advisor/clergy. All of these experts should be in conversation with each other and your family.

    You can find a Certified Arborist through the Trees Are Good: Find An Arborist search function.

    Your arborist should follow the adage: ‘right tree, right place, right reason, right season’. They will likely ask if you have a species, leaf colors, flowering or anything particular in mind that reminds you of the person you have lost.

    Your arborist should be trained on how to plant a tree properly, keeping in mind the size, location especially in regards to long term maintenance and should communicate this to you. The US Forest Service provides a great manual for tree owners.

    If you’re choosing to inter your relative in a cemetery, talk about tree care and what the tree maintenance schedule looks like with funeral home/cemetery staff. If the trees are not well-maintained, especially over graves and memorials, other important details for your relative’s resting place may be overlooked.

    Both deciduous and evergreen trees are suitable, depending on the story the family is trying to tell. It may be wise to ask if the family wants a tree that ‘follows’ the seasons (in the sense that it goes dormant every year) or one that ‘perpetuates’ all of the seasons (that the tree doesn’t enter dormancy in the winter).

    This phrasing may not work for you, so feel free to explore how to ask these questions with someone that supports the family during difficult times such as clergy or the funeral director.

    Planting saplings can be therapeutic for families that have lost children. As the tree grows and reaches maturity, one can remember that seeds can be shared with friends and relatives to commemorate life events.

    Trees are just as unique as people and have characteristics that shine in different seasons:

    A native redbud (Cercis occidentalis or Cercis canadensis) which blooms in early spring for a loved one that had a birthday during that time or to celebrate new life after a long winter. The heart shaped leaves that exist throughout the growing season evoke a sense of whimsy and have charismatic movement when the wind blows by.

    Perhaps the person who passed away loved water and was creative. If appropriate site conditions exist, a native willow species may be a good option. Many creative opportunities exist with willow, especially within weaving traditions.

    Be open to what moves and inspires you.

    I lost a tree that means a lot to me. What are my options?

    Depending on many factors like the species, health, and existing risk you may be able to support your memorial tree as a ‘snag’.

    ‘Snags’ are trees that have died, but still exist as habitat. They fill ecological roles beyond their natural life. An excellent online resource for your arborist is Cavity Conservation Initiative.

    If the tree is not able to be turned into a snag, you can request to keep burls or other prime pieces of wood for art pieces, furniture, frames for paintings, or other creative expressions.

    If all else, you may be able to request to mulch the tree and keep the mulch for your use. or use for firewood. Please remember to keep felled trees on your property. It helps reduce spread of invasive species & diseases.

    I’d like to celebrate a tree in my life

    Here is a short list of ceremonies to explore. This isn’t a ‘scientific’ list of things you can do to save a tree, but rather a way to come to terms spiritually and emotionally with events that are co-occuring to you and the tree.

    When you plant a tree, consider taking photos. You can write letters to the tree and place them on the branches, or bury them in the soil.

    Commit to watering your newly planted tree on certain days of the week. After establishment, consider doing deep waterings seasonally.

    When you have decided to remove the tree, let the tree know what is happening. Sit with the tree and chat with them. Thank them for anything they’ve helped you with: shade, food, play, etc.

    When decline begins, ask the tree to produce seed so you can propagate its progeny. Some trees will produce vast amounts of seed at the end of its life anyway, but it doesn’t hurt to ask.

    When you’ve removed a tree, consider building a fire with the felled wood. Try writing letters of good memories and place them in the fire. As the smoke reaches into the sky, so will your thanks. The cooled ashes have many uses and can be reused.

  • Free ISA CEUs: Week of May 19, 2025

    Free ISA CEUs: Week of May 19, 2025

    Much to celebrate this week: Tuesday is World Bee Day (remember native bees and birds are pollinators!), Wednesday is World Fish Migration Day, Thursday is International Day for Biological Biodiversity and Friday is World Turtle Day. We will be posting about these informal international holidays and how they relate to urban forestry. There is 1 free ISA CEU training opportunity available this week.

    Wednesday May 21, 2025

    ITree Open Academy Spring 2025

    The view from the top: i-Tree Canopy and OurTrees. You can’t manage your forest resource unless you know what you have. Get an estimate of tree canopy cover for any area or monitor change with a few hours of image analysis. Or save your mouse clicks and see if a quick visit to OurTrees will get you what you need.

    Wednesdays @ 1pm EST (May 7-June 11, 2025)

    Register Here

    Remember, you can always ask your local ISA chapter if your event qualifies for CEUs.

    If your organization is hosting a free in-person or virtual ISA CEU opportunity, please reach out to us so we can get your event on this list.

    Subscribe to continue to receive free notifications for no-cost ISA CEU events.

  • Cycling Impacts on Urban Forests

    Cycling Impacts on Urban Forests

    In honor of National Bike month, we’re exploring the impacts of cycling on urban forests.

    On a personal level, I am an avid cyclist. It was my main form of transportation until I bought my first car around 23. Before that, I walked, took the bus, rode my bike and got rides with friends. It was a bit easier back when UTA had expanded routes, but due to lack of accessibility, it limited the opportunities for my education and career.

    On a professional level, I advocate for the reduction of car dependency in our communities on multiple levels. This tends to be a controversial take since most of the United States lacks comprehensive alternatives for personal vehicles.

    Let’s examine how bicycles positively impact urban forests:

    What are the main contributing factors to urban tree decline in communities?

    Most certified arborists, tree workers, tree surgeons and other folks in the industry would widely agree that the leading causes of tree mortality are related to:

    • watering: drought and/or over-watering, depending on local climate and soils
    • poor site selection, preparation, planting and establishment which leads to soil compaction and root damage
    • overall environmental stress: pollution, urban heat and increased storm runoff due to impermeable surfaces

    The Arbor Day Foundation has a great phrase that we all love to use: “Right Tree, Right Place, Right Reason”. It’s a great reminder to keep in mind the leading causes of preventable tree mortality in communities.

    How do urban forests influence public health outcomes related to car pollution?

    I like to think of trees as oases in communities. They provide innumerable ecosystem benefits, or ‘ecosystem jobs’ in our neighborhoods: shade, cooling, water purification, water percolation, erosion reduction, biodiversity hubs, habitat for wildlife, food, etc. These benefits begin to decline when trees are exposed to environmental stressors like poor water quality, car pollution and root compaction.

    Cars produce various kinds of pollution: noise, particulate matter, volatile organic compounds, nitrous oxides, carbon monoxide, sulfur dioxide and carbon dioxide.

    Unfortunately, urban trees aren’t as ubiquitous in every neighborhood as one might hope. In communities that have been denied environmental justice, they are disproportionately affected by pollution and lack of green spaces, including vehicular emissions.

    Tree planting projects and other forms of achieving canopy equity used the Climate and Economic Justice Screening Tool to identify communities which would benefit from federal and state funding in urban forestry. CEJST was removed by the current administration, but the dataset is still available through Harvard Law School.

    If trees and other plants aren’t able to sequester pollution due to the intensity and density, then it directly affects our health.

    Making 50% of short trips by bicycle would yield savings of approximately $3.8 billion/year from avoided mortality and reduced health care costs (95% CI: $2.7 billion, $5.0 billion]. We estimate that the combined benefits of improved air quality and physical fitness would exceed $8 billion/year.

    Health impacts included the avoidance of more than 850 incidences of human mortality and 670,000 incidences of acute respiratory symptoms.

    Trees and forests are especially well-known for their ability to sequester carbon and biodiversity in forests leads to more robust survival outcomes in relation to climate change effects.

    In urban forestry, we call this the 10-20-30 (or Santamour) rule: No more than 10% of the same species, no more than 20% of the same genus and no more than 30% of the same family.

    To summarize, the more plants we install with different ecological ‘jobs’, the more we can reduce negative health impacts in our communities. In general, native plants are our best opportunity to ensure biodiversity in urban environments.

    To learn more about biodiversity, check out ‘Why Biodiversity Matters in Urban Forests’.

    In what ways do alternative forms of transportation reduce human causes of environmental stress on trees?

    By walking, biking or even carpooling, you are reducing the amount of carbon dioxide that you are producing as an individual. It won’t offset industry or billionaire waste, but it will help you and your local community with overall positive health effects.

    During the early days of the pandemic, there was a reduction of greenhouse gas emissions. While greenhouse gas emissions have returned and exceeded previous levels, there is evidence that community-led action leads to better public health outcomes.

    Why Bicycles? (sourced from https://www.peopleforbikes.org/statistics/environmental)

    If 20% of short car trips were replaced by bicycle trips in Milwaukee and Madison, Wisconsin, it would prevent 57,405 tons of carbon dioxide from being emitted, a value of $1.2 million. Grabow, M., et al., 2010  – Valuing Bicycling’s Economic and Health Impacts in Wisconsin, January 2010

    When car travel restrictions reduced morning traffic by 23% during the 1996 Olympics in Atlanta, ozone concentrations decreased 28% and acute care visits for asthma decreased 41%. Friedman, M., et al., 2001  – Impact of Changes in Transportation and Commuting Behaviors During the 1996 Summer Olympic Games in Atlanta on Air Quality and Childhood Asthma, Journal of the American Medical Association, 285(7):897

    A San Francisco Bay Area study found that increasing biking and walking from 4 to 24 minutes a day on average would reduce cardiovascular disease and diabetes by 14% and decrease GHGE by 14%. Maizlish, N. et al 2012  – Health Cobenefits and Transportation-Related Reduction in Greenhouse Gas Emissions in the San Francisco Bay Area

    When the complete life cycle of the following modes are taken into account, the carbon emissions are approximately: Bicycle, 21 g CO2/passenger/km traveled Electric-assist bicycle, 22 g CO2/passenger/km traveled Passenger car, 271 g CO2/passenger/km traveled Bus, 101 CO2/passenger/km traveled. European Cyclists’ Federation, 2011  – Cycle more often 2 cool down the planet: Quantifying CO2 savings of cycling

    A recent study of Barcelona’s bike sharing program, Bicing, found that the health benefits of using the system outweigh the risks by a ratio of 77 to one. The study also estimated that Bicing reduces carbon dioxide emissions by more than 9,000 metric tons every year. Rojas-Rueda, D., et al., 2011  – The health risks and benefits of cycling in urban environments compared with car use: health impact assessment study, BMJ 2011;343:d4521

    There are 800 million car parking spaces in the U.S., totaling 160 billion square feet of concrete and asphalt. The environmental impact of all car parking spaces adds 10 percent to the CO2 emissions of the average automobile. Chester, M., et al., 2010  – Parking infrastructure: energy, emissions, and automobile life-cycle environmental accounting, Environmental Research Letters, 5

    The air quality improvement and reduced greenhouse gas emissions due to bicycling in Wisconsin is worth more than $90 million every year. Grabow, M., et al., 2010  – Valuing Bicycling’s Economic and Health Impacts in Wisconsin, January 2010

    If 20% of Madison, Wisconsin commuters biked to work, it would save 16,687 tons of carbon dioxide emissions, a value of $366,577. If 20% of Milwaukee commuters biked to work, it would save 40,718 tons of carbon dioxide emissions, a value of $821,282. Grabow, M., et al., 2010  – Valuing Bicycling’s Economic and Health Impacts in Wisconsin, January 2010

    Bicycle traffic in Copenhagen prevents 90,000 tons of CO2 from being emitted annually. City of Copenhagen, 2010  – Bicycle Account, 2010

    More CO2 is emitted by the United States’ transportation sector than any other nation’s entire economy, except for China. Greene, D., and Schafer, A., 2003  – in Pedroso, M., 2008, Safe Routes to School: Steps to a Greener Future

    If 5% of New Yorkers commuting by private car or taxi switched to biking to work, they could save 150 million pounds of CO2 emissions per year, equivalent to the amount reduced by planting a forest 1.3 times the size of Manhattan. Transportation Alternatives, 2008  – Rolling Carbon: Greenhouse Gas Emissions from Commuting in New York City

    Half of U.S. schoolchildren are dropped off at school in the family car. If 20% of those living within two miles of school were to bike or walk instead, it would save 4.3 million miles of driving per day. Over a year, that saved driving would prevent 356,000 tons of CO2 and 21,500 tons of other pollutants from being emitted. Pedroso, M., 2008  – Safe Routes to School: Steps to a Greener Future

    What activities can you do to celebrate National Bicycle Month ?

    Register & Vote in local elections.

    Reduce your car use through carpooling, walking, cycling, etc.

    Join a community bike ride

    Continue to use the Climate and Economic Justice Screening Tool

    Take Free ISA CEU courses to learn more about tree care.

    Support awareness efforts like Healthy Trees, Healthy Lives.

    Take a free Tree Board University course

    Get involved with your local Municipal Tree Board.

    Volunteer in a tree planting, neighborhood cleanup or celebration.

    Instead of driving, try to ride, walk, take the bus, or carpool.

    Learn about native plants around you and teach others.

    Book a Forest & Nature Therapy walk to unwind.

    Read a book by Dr. Robin Wall Kimmerer, an Indigenous botanist.

    Explore some current conversations in urbanism

  • World Migratory Bird Day: Urban Forest Edition

    World Migratory Bird Day: Urban Forest Edition

    What is World Migratory Bird Day?

    World Migratory Bird Day celebrates the birds that travel across the world’s ecosystems, including urban areas.

    When is World Migratory Bird Day?

    World Migratory Bird Day is celebrated in the Spring and Fall of each year, both on the second Saturdays of May and October.

    In the spring, birds fly to nesting sites. In the fall, they fly home to wintering areas. All species of birds vary in their migration patterns. They take different routes and it doesn’t all happen at the same time. These days were chosen to remind communities about the general season of bird migration.

    How are migratory birds relevant to urban forests?

    It’s not a coincidence that birds are migrating during the leafing out and dormant periods of trees. Trees provide housing, protection, food, observation points, location for mating rituals and much more.

    Many species of birds use tree materials to build their homes, just like people (but on a smaller scale). Here’s a short list of nest building materials that you may typically see in your neighborhood:

    • sticks
    • leaves
    • bark
    • tree ‘cotton’ (cottonwood seeds)
    • lichen

    Flocks of migrating birds use urban forests as way-stations to final nesting locations. During migration, many birds are injured or killed due to collisions and urban infrastructure (like large glass windows).

    However, many of these final nesting habitats are affected by rapid urbanization. Ideal areas to raise offspring are becoming rarer as biodiversity is reduced in residential and commercial areas. Removal of habitat for homes, commercial buildings and their parking lots and increasing amounts of plant monocultures (like golf courses and residential lawns) have reduced available opportunities for seasonal forage like insects and berries.

    Many of the same quality of life issues for trees affect birds. If trees are not well-cared for in a community through management, tree mortality increases. This reduces habitat quality for migratory birds too.

    How can I learn more about building bird habitats through tree care?

    The Cavity Conservation Initiative has a great manual that describes Best Management Practices for conserving snags, or dead trees for habitat: Tree Care for Wildlife BMPs. It was designed to be used in California, but the information is invaluable for anyone who is interested in forest management.

    Avian Flu & World Migratory Bird Day

    For the most recent updates for Avian Flu related to migrating birds, visit AllAboutBirds.org.

    How can I support migratory birds in my neighborhood?

    • Plant native species
    • Keep your domestic cats indoors
    • Rather than ‘spraying for bugs’, start utilizing Integrative Pest Management strategies to increase biodiversity. Methods vary by area, so reach out to your local Extension office for Best Management Practices (BMPs).
    • Turn off lights at night to help birds find their way
    • Replace the type of outdoor lights you use to reduce light pollution
    • Put stickers on large windows to reduce collisions.
    • Support the health of your trees by hiring a Certified Arborist
    • When removing a tree, consider keeping it as a snag on the advice of a Certified Arborist who has a Tree Risk Assessment Qualification (TRAQ)

    What organizations can I support to help protect birds?

    Cavity Conservation Initiative

    Bird City Network

    Dark Sky International

    National Audubon Society

    BirdCast

    Indoor Pet Initiative

  • Free ISA CEUs: Week of May 5, 2025

    Free ISA CEUs: Week of May 5, 2025

    The first full week of summer is finally here! Keep a look out for birds, Friday is World Migratory Bird Day. There are 3 free ISA CEU training opportunities available this week.

    Tuesday May 6, 2025

    TreeFund Webinar @ 12:00pm CST. 

    Enhancing collaboration amongst urban forest stakeholders – An assessment of natural hazard risk perceptions in relation to the services and disservices of city trees

    Register Here

    Wednesday May 7, 2025

    ITree Open Academy Spring 2025

    May 7th – Introduction to i-Tree. Understand the basic science of tree benefits and the USFS & cooperator research behind them. Explore the relationships between the i-Tree tools and the data they provide. Start to consider which i-Tree tools will be best for the project you have in mind.

    Wednesdays @ 1pm EST (May 7-June 11, 2025)

    Register Here

    Thursday May 8th, 2025

    UCFS Learning Series–The Future of Tree Inventories: AI, LiDAR, and Smart Urban Forest Management @ 11am MDT

    Tree inventories have come a long way from pen-and-paper surveys to cloud-based GIS systems—but the future is even smarter! Today, with cutting-edge technologies like AI, LiDAR, and machine learning, the way we assess, manage, and care for our urban forests is being completely transformed. These technologies enhance data accuracy, automate analysis, and provide real-time insights, empowering urban foresters to make more informed, efficient decisions. This exciting shift is not only about better managing our urban trees—it’s about shaping more resilient, sustainable communities.

    Register Here

    Remember, you can always ask your local ISA chapter if your event qualifies for CEUs.

    If your organization is hosting a free in-person or virtual ISA CEU opportunity, please reach out to us so we can get your event on this list.

    Subscribe to continue to receive free notifications for no-cost ISA CEU events.