The old story that trees will grow better
if their nearby competitors are removed so that they can get lots of sunshine
and water, comes from the forestry industry that wants trees to grow quickly so
they can be harvested at a young age.
However, forester and author, Peter Wohlleben in the The Hidden Life of Trees tells a new story based on decades of observation and science. He says that although the story of competition may be true for trees of different species, it is not true for trees of the same species. Beech trees for example share resources. Researchers have found that they synchronize their photosynthesis or sugar production using the power of the sun, so that all the trees are equally successful. They share the sugar through their roots. The trees that have an abundance give sugar to the trees that are struggling. Wohlleben likens this to a social security system.
However, forester and author, Peter Wohlleben in the The Hidden Life of Trees tells a new story based on decades of observation and science. He says that although the story of competition may be true for trees of different species, it is not true for trees of the same species. Beech trees for example share resources. Researchers have found that they synchronize their photosynthesis or sugar production using the power of the sun, so that all the trees are equally successful. They share the sugar through their roots. The trees that have an abundance give sugar to the trees that are struggling. Wohlleben likens this to a social security system.
Peter Wohlleben |
It is therefore beneficial for these
trees to grow close to each other so that they can share resources. Foresters
in the north of Germany have found that beech forests are more productive when
the trees are “packed together” (Hidden Life p.16).
If nearby trees are cleared out, then trees that are struggling send out
a message for help that goes unheard. Other
trees create a lot of sugar and grow better but they aren’t long-lived. “This is because a tree can only be as strong
as the forest that surrounds it,” writes Wohlleben (p. 17). The weaker trees with no help are eventually killed by
disease or insects.
Wohlleben has spent decades observing forests |
As well, when holes are created in the
forest canopy by cutting down trees, the sun and wind dries out the forest floor and changes the moist, cool
microclimate that trees depend on for health. Beech trees’ “well-being depends on their
community, and when the supposedly feeble trees disappear, the others lose as
well.” (p. 17) This story challenges the accepted idea of survival of the fittest, the story of competition for resources that is a part of the old paradigm of hierarchy and scarcity. Wohlleben describes why diversity, not monoculture is what creates security for ancient forests.
Peter Wohlleben was born in 1964 in Bonn, Germany. He
studied forestry and worked as a forester with the German government for over 20
years. After observing trees for all
this time, he developed his own ideas about how forests work. “To work with trees is my
life, “ he writes. Wohlleben gave up his government job to pursue these ideas
and now runs an environmentally friendly municipal piece of woodland in the
village of Heummel. He writes and speaks about what he has learned from the trees he loves. You can hear Peter
Wohlleben share this information in a short interview.
The Hidden Life of Trees
describes how trees feel and communicate. It is full of surprising facts that have been revealed by recent research. For example, when a tree has it's leaves eaten, it can release a chemical that makes the leaves taste bad. In addition it can release a wind born scent to warn nearby trees of the threat so they can prepare.
This is a new story being told about
how trees work together and function as communities. The story is being told by a man who has
spent decades observing and learning from these forests. We have a lot that we can learn from these
ancients about how to cooperate and create healthy, sustainable communities and find our place within nature.
Peter Wohlleben (2015)The Hidden Life of Trees. Vancouver: David Suzuki Institute.