What I Discovered When I Really Looked at a Pine Tree
- Glen Sealy

- Feb 21
- 6 min read
And Why Every Tree in Our Parks Actually Matters
I casually wondered what pine trees look like when there's no snow or decorations on them - just the tree itself, stripped of all those festive associations we pile onto them every December. So I grabbed my camera and got close.
Really close.
What I found was a whole world I'd walked past countless times without really seeing. Silvery-blue needles arranged in these perfect geometric patterns, incredible textures, and this quiet beauty that exists completely independent of whether humans think it's pretty or useful.
And that got me thinking about how we see trees in general. Most of us walk through parks and see landscaping - nice green things that make the space look good. But these trees, these pine trees in Holland Park and parks everywhere, they're doing so much more than just looking decorative.
There's a Whole Ecosystem in Those Needles

Those silvery needles I photographed? They're home to specialised insects that have evolved specifically to live on pine trees. Coal tits and goldcrests depend on pine seeds to get through winter when other food is scarce. And that dense evergreen foliage provides shelter during harsh weather - protection that bare deciduous trees simply can't offer in winter when wildlife needs it most.
Think about it. In a park full of trees that lose their leaves, evergreens create year-round cover. Birds and small mammals can shelter there when everywhere else is exposed. They nest at heights that aren't available in other park trees. And beneath the canopy, there's this stable microclimate where temperature and moisture stay relatively constant even when everything around it is fluctuating wildly.
That silvery coating on the needles - the waxy cuticle that gives them that distinctive colour - it's not just pretty. It reduces water loss, protects against frost damage, and reflects excess light. These adaptations let the tree keep its foliage all year, which means continuous habitat and food when other trees are standing bare.
Why Mature Trees Are Irreplaceable
Here's something that really surprised me when I started researching this. A mature tree captures way more carbon than a young one - and the rate actually increases as trees get older, not decreases. A big tree can filter hundreds of times more air pollution than a sapling.
And stormwater? A mature tree's root system can absorb thousands of gallons during heavy rainfall. That prevents flooding and takes pressure off our aging drainage systems. Young replacement trees take decades to develop roots like that. So when you remove a mature tree, you're creating an immediate gap in the landscape's ability to manage water, and that gap lasts for 20-30 years.
The same goes for cooling cities. Large trees provide extensive shade and cool the air around them. Replace a mature tree with a young sapling and yes, you've maintained the tree count on paper, but you've eliminated the actual cooling benefit for decades.
Perhaps most importantly, mature trees support way more biodiversity than young ones. As trees age, they develop cavities, loose bark, dead branches - all these structural features that provide habitat for cavity-nesting birds, bats, insects, lichens, and fungi. These features take decades to develop. You can't create them artificially in a young tree.
We're Losing More Trees Than We're Gaining
Here's the thing that really concerns me. Cities worldwide are losing mature tree cover despite all the tree planting initiatives. Development, aging infrastructure that requires root removal, disease, lack of maintenance, climate stress - they're all removing mature trees faster than young plantings can replace them.
And it's a visibility problem too. When a mature tree gets removed and five young trees get planted, the number might stay the same or even increase. People see that as successful tree management. But ecologically, it's a massive loss. You can't offset a 50-year-old tree by planting five saplings. The ecosystem services disappear immediately and take decades to restore.
Funding doesn't help. Tree planting gets media attention, corporate sponsors, volunteers. Everyone loves a planting day. But maintaining existing trees - which needs skilled arborists and specialised equipment and ongoing investment - that gets far less support. We celebrate planting while quietly accepting the removal of mature trees.
Disease is another worry. Remember Dutch elm disease? It wiped out elm populations across Europe and North America. Ash Dieback is doing something similar to Ash trees right now. When one species dominates urban plantings, disease can eliminate it from entire regions within years. That's catastrophic loss of tree cover and all those services trees provide.
So What Actually Helps?
The shift needs to be from planting to protecting. That means proper tree protection policies during development. Professional maintenance of existing trees. Disease prevention. Protecting root zones from soil compaction and construction damage. Making sure trees get water during drought, especially newly planted ones.
Diversity matters hugely. If our urban forests depend heavily on one species, they're vulnerable to disease or climate change wiping them out. Maintaining diverse plantings - native and well-adapted non-native species - means disease affecting one species won't devastate entire parks. Different tree species also support different wildlife, providing varied food resources and habitat.
And we need to think long-term about climate change. Trees planted today will face very different conditions as they mature. We need to consider what temperature ranges, precipitation patterns, and extreme weather will look like 50-100 years from now. That doesn't mean abandoning native species, but it does mean being thoughtful about which species will actually thrive.
Community engagement is essential too. People protect what they value, and they value what they understand. When communities know that mature trees provide services worth thousands of pounds annually - actual, quantifiable benefits like stormwater management and air quality improvement - they're more likely to support the funding needed to maintain them.
But here's the crucial bit: professional management can't be replaced by volunteers. Community tree planting is great for engagement and education, but maintaining mature urban forests requires trained arborists with proper equipment and expertise. Chronic underfunding of professional tree care undermines conservation no matter how many saplings volunteers plant.
Why This Matters to Me

These photographs came from a simple question: what do pine trees actually look like when I really pay attention? And yes, I found beauty - intricate, detailed beauty I'd never noticed before. But I also found myself recognising the complex ecology these trees support and all the ways they contribute to making our city function.
That shift in seeing - from 'tree as decoration' to 'tree as functioning part of the ecosystem' - that's what urban conservation is really about. When you understand that every mature tree provides real, measurable services, removing one becomes a serious decision that needs justification, not just routine maintenance. When you understand how long it takes for replacement trees to provide equivalent benefits, protecting existing trees becomes the obvious priority.
Photography helps with this. Getting close enough to see detail, paying attention long enough to notice patterns, taking time to understand what you're looking at - these practices build the kind of attention that conservation needs. You can't protect what you don't notice, and you can't notice without paying attention.
Those silvery-blue needles represent more than just a nice photograph. They're documentation of an urban tree doing exactly what it should - healthy, mature, providing habitat and services while offering accessible nature to millions of people. This is what conservation success looks like, and it's absolutely worth protecting.
The Bigger Picture
Urban tree conservation doesn't have the drama of saving endangered species in remote places. No one's making a documentary about the pine trees in Epping Forest. But the ecological and social importance of urban forests equals or exceeds many wilderness areas that get far more attention and resources.
Millions of people interact with urban trees every single day. For many people, especially children in cities, these trees are their only regular contact with nature.
The understanding and conservation mindset that develops from these interactions shapes how people think about environmental issues throughout their lives. Urban forests matter both for what they do directly and for how they help people connect with nature.
The challenge is getting this value recognised in funding priorities and planning decisions. Trees need to be protected as critical infrastructure that provides essential services, not dismissed as decorative features that can be casually removed and replaced. That needs public education about what trees actually do, and political will to prioritize long-term health over short-term development pressures.
These photographs started with curiosity about something familiar. They ended up documenting something more important - evidence that urban conservation can work, and a reminder of what we stand to lose if we don't protect and maintain our urban forests properly. Every mature tree matters. Every park matters. The ordinary things we walk past every day can be extraordinary when we pay enough attention to actually see them.








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