Tag: nature

  • 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 26, 2025

    Free ISA CEUs: Week of May 26, 2025

    A new moon tonight, a new start tomorrow; a fitting start to Memorial Day.

    There is 1 free ISA CEU training opportunity available this week.

    Wednesday May 28, 2025

    ITree Open Academy Spring 2025

    The view from the top: i-Tree Landscape: Data and tree benefits map portal. With dozens of layers covering a wide range of geographies, Landscape has a lot going on. This session will keep you on track to finish with maps of tree benefits and identify priority areas in your community.

    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.

  • World Pollinator Day & Urban Ecology

    World Pollinator Day & Urban Ecology

    What is World Pollinator Day?

    World Pollinator Day, or World Bee Day, is an environmental awareness holiday to support the critical role of pollinators in our communities.

    Why should I care about World Pollinator Day?

    As we describe on this blog frequently, all life is connected.

    Angiosperms, or flowering plants, make up about 80% of all life on earth–over 250,000 species. Of these species, a significant portion are food crops and 35% of all food crops are pollinated.

    The health of the environment is directly tied to our health and pollinators. Scientists have specific vocabulary that describes that relationship: indicator species. Indicator species aren’t always pollinators , but can be amphibians, birds and other organisms that show the effects of climate and environmental change so acutely, we can measure their presence to show the impacts of environmental change.

    What are pollinators?

    Pollinators include many kinds of life, not just insects. Birds, bats and some mammals are also pollinators, (including humans). These organisms have a long relationship with flowering plants through a process called co-evolution.

    Why do scientists say that we’re in a mass extinction event?

    If you speak to your parents, grandparents or folks that are older than you, you will likely hear about how much the world has changed since they were you age. This doesn’t necessarily apply to just technology or economic changes, but also includes changes in your environment. You may have also noticed differences in your environment as you have gotten older. I know I have.

    I’m in my early 30s, but I moved around and traveled a lot as a kid. Some of the strongest memories I have were from road trips. Although we lived in a desert climate, there were so many insects all over our car any time we drove more than an hour. This became more pronounced when we moved further east to the other side of the United States and when we moved overseas.

    When I moved back to my hometown in Central Utah in the mid 2000s, there was such a noticeable decrease in insects and birds that my parents were surprised. When I moved to Texas in 2022, I’d be on long roadtrips for work, up to 8 hours of driving through various climates and ecosystems, I’d rarely have any bugs on my front bumper or windshield. This is called the Windshield Phenomenon, a measurable indicator of climate change and ecological health.

    Why is the decrease in insect diversity concerning?

    Insects hold a unique role in ecosystems. When scientists talk about ‘trophic levels’ and ‘food webs’, insects are some of the most important species holding it all together.

    Many insects function as pollinators, which help plant species propagate and create new life. They also function as food for other species and a significant source of protein for larger organisms like birds and amphibians.

    Take a look at this example of a food web from North Carolina State University:

    What are you noticing about this food web?

    What would happen if the plant was removed?

    What effects would occur for the other living organisms that depend on that plant for food?

    This is a very simplified example of what ecologists do on a day to day basis, examining site conditions to determine ecological impacts for various (and frequently innumerable) species. There are specific ways of managing and documenting species that help maintain and encourage ecosystem health for future generations.

    How are urban forests and pollinators connected?

    Urban forests are one of the largest pockets of greenspace in cities that include multiple levels of plant biodiversity.

    Typically, you see a diagram like this (from New York City Parks & Rec Department) when talking about urban forest canopy levels/structure:

    Each of these layers has a role and supports specific ecological niches.

    These plants, ideally, are native species that provide habitat, food and other ecosystem services that support urban biodiversity. Native species have been around for a long time and have developed partnerships with native pollinators for eons.

    However, it is recommended to increase the biodiversity of canopy species to reduce pests and disease, so non-native species are frequently planted to achieve those goals. Additionally, it is hard to find many species of plants in commercially available nurseries as they have specific ways of germinating that impact it’s viability as a commercial product.

    How do I find information about my local pollinators?

    There are so many different resources to learn about your local pollinators.

    Internationally, iNaturalist is one of the best tools available. Data is collected by everyone and confirmed by experts in your community and worldwide. There are apps in all major app stores, a comprehensive website and has worldwide events anyone can participate in. It’s free, supports open-sourced data, and works like a real-life PokeDex.

    In the United States, most land-grant universities have Extension offices. These are community experts that typically specialize in traditional settler agriculture, but are increasingly including experts in native plants, gardening and engaging in community science opportunities and training for laypeople.

    Are domestic bees pollinators?

    Technically, yes.

    However, they aren’t the most efficient pollinators and increase competition for forage among native species. This has wide reaching effects and causes conflict among conservation advocates and community members who are seeking food sovereignty through bee-keeping.

    One way to keep domestic honeybees and support native bees and other pollinators is by building habitat.

    How do I increase pollinator diversity?

    Plant more native species in your area!

  • 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