Saturday, April 20, 2024
April 20, 2024

Blowdown a windfall for forest research

A University of British Columbia researcher is using windfall from the Dec. 20 windstorm to further her research into the history of wildfires on Salt Spring Island.

While old-growth trees can be a wealth of information about the history of climate change and wildfires for a given area, taking samples usually ends up killing the tree. However, the recent windstorm has provided researchers with an opportunity to obtain samples and valuable insights from the fallen trees.

“These big old trees are so rare that we don’t want to be cutting into them for this type of project,” said lead researcher Tara Martin. “When I started to notice that several big ones fell in our area, I thought it was a good opportunity to put out a wider call.”

First Nations peoples traditionally used fire to promote food and other resources. The oldest trees on the island will often have scars or remnants of those fires. However, the last 150 years have seen fewer fires and any fires have been actively suppressed.

“When we combine fire suppression with post-logging regrowth — most of our forests are second-growth forests with the exception of these few big old giants — we get structurally a very different looking forest,” she said.

Martin said that Garry oak meadow ecosystems were more prevalent on the island before fire suppression. These ecosystems have been replaced by stands of Douglas-fir growth, particularly in deeper soil areas.

“The [samples] can tell us about how we might want to manage our forests in the future if we’re interested in plant diversity and maintaining biodiversity,” Martin said. “They can also tell us about minimizing fire risk in terms of what our forest should look like to minimize fire risk in terms of risk to property and human life.”

Martin is asking for anyone who might have a tree that fits the criteria to contact her. The trees need to be older than 250 years old, which can be difficult to determine. She is looking for samples of the tree rings cut at a height of about 1.5 metres. For her research, she also needs information about where the tree grew.

Those who have a potential tree on their property are asked to contact Martin at tara.martin@ubc.ca. Martin can also help identify trees that might be usable.

For more on this story, see the Jan. 16, 2019 issue of the Gulf Islands Driftwood newspaper, or subscribe online.

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