Life in and Around a Tree

We sometimes think of trees as solitary objects - lone specimens standing in a field of green.  Or we think of them in clusters of a forest, one indistinguishable from another.  But trees, like everything else, are interconnected and linked with all life around them.  I thought about this when looking at the tree in my backyard yesterday.  What life does this tree support along its vertical axis?  And what relationships do these life forms have with each other?  What can we learn from these connections?

The pride of my backyard - our Norway Maple

Our Norway Maple was planted well over 50 years ago, and is large and established, much like most of the trees in my downtown neighborhood.  This type of tree, however, is considered to be an invasive species because it sends off thousands of little "helicopter" seeds, sometimes a couple times in a season, that create tiny little trees everywhere you look.  Its leaves are also so complete as to shade everything below it and its roots are so dense and shallow such that very little else can grow among them. For these reasons, and the fact that it was planted underneath an elevated power line, I'm not sure it was the best selection that the former land owners could have made, but I love it just the same.  

I love that my house was designed on axis with the tree so that as soon as you walk in my front door, you see the tree centered in the back.  I love that it shades the back part of my yard so completely that you can lie in the grass in 90 degree weather and feel cool.  I love that my daughter's playhouse never sees the sun and is always cool for her to play in.  And I love all the critters it attracts to my garden - even the chipmunks which eat every last strawberry I plant.  Well, maybe not the chipmunks.  What other life does my maple support? 

Let's look a little closer.

July's Prairie Flowers as Design Inspiration

Today was a beautiful sunny day for a bike ride through the Springbrook Prairie Forest Preserve.  It was hot today.  Very hot.  But the flowers in the prairie were in full bloom, and I was curious about the plants I found there.  What are their names?  Where do they grow and why?  Is there anything we can we learn from them that could influence design?  To try and answer these questions, I took a collection (which doubles as an interesting wildflower arrangement) and have attempted to classify a few of the flowers I picked.  I did a little research on the natural history of each and then have extrapolated a few questions as to how each plant may inspire design.  What questions do you think the plant could help us answer?  

Purple Coneflowers (Echinacea)

Aster (Daisy) family (Asteraceae)

Natural History:  This plant, while native to Illinois, is not that common in native habitats.  In fact, most of the plants that grow in the wild are escaped cultivars or as a result of prairie restoration efforts.  On my ride, there were only small clusters or small groups of individuals but I was determined to collect a few for my daughter, who loves pink flowers.  It has only a faint smell.  The stem is strong and rigid and the seed head is heavy.  The petals are smooth on top, rough on bottom, and damaged with black spots from insect or impact damage.  The top of the flower head is a collection of small spines, which is why it was named after the latin name for "hedgehog."  The spines are packed closely in the Fibonacci spiral formation, which allows for radiating growth.  

Biomimicry Inspiration:  I wonder what a seating arrangement in a restaurant, theater in the round, or other establishment where many people must be placed would look like if we tried to emulate this radiating pattern?  Would its allowance for growth allow the seating arrangement to grow and contract as needed depending on how many people need to be seated?  Would this pattern be relevant to temporary disaster shelter camps as well?  

Genius of Place: Lichen in a New England Forest

Lichen are plants and fungus that create a mutualistic relationship greater than the sum of their parts.  What can we learn from them?

Common Greenshield Lichen.  Flavoparmelia Caperata.  Photo by Amy Coffman Phillips

Natural History
How does the lichen fit into this forest?


Walking through the forest for my first iSite in the Harvard Forest, I came upon this beautiful lichen growing on a red maple tree.  Up close, it looks like flattened lettuce or cabbage growing in these romantic formations, an example of a foliose (leaf like) lichen.  And lichen is unique because it is not one organism, but a symbiotic relationship between two organisms:  fungi and algae.  To form a lichen, the fungus either encloses the algae in fungal tissue or penetrates the algal cell wall in order to harness their photosynthetic abilities.  The fungi form the structure and then recruit algae to come live with them, and the algae benefits from the protection the fungi provide as well as their ability to capture water and nutrients.  The mutualistic relationship between these two organisms (although sometimes commensalistic or even parasitic depending on the species) is greater than the sum of its parts because it allows both organisms to survive and thrive in areas they would not be able to alone.  Their relationship creates benefits for the ecosystem as a whole as well because as rain water falls down the bark of a tree, it gathers nutrients from the lichen which feeds nitrogen and other nutrients to the soil, and then by extension, the tree and other plants.