"Big Lonely Doug", Port Renfrew, on Vancouver Island, British Columbia, shown being scaled to get an accurate measurement of its height. At 66 metres it's the 2nd tallest Douglas Fir in Canada..... BigTree ID#386
Photo Credit: TJ Watt

Identifying Canada’s biggest trees.


They are often huge. They are always majestic and awe-inspiring. Some have been around for a thousand years or even more.  Now a renewed effort is underway to document these giants.

It’s called the BC Big Tree Registry

Sally Aitken is a professor in the Department of Forest and Conservations Sciences at the University of British Columbia where the registry is now based. She is also the Director of the Centre for Forest Conservation Genetics

University of British Columbia professor Sally Aitken of the Department of Forest and Conservations Sciences at the University of British Columbia. She is also the Director of the Centre for Forest Conservation Genetics © Martin Dee

Canada of course has lots of big trees, really big trees, but the biggest trees in Canada and some of the world’s biggest are found in the west coast province of British Columbia.

It’s believed that it’s due to the generally mild and wet climate. The registry has many huge trees listed at over 40 metres. Even some at 80 and 90 metres.  Big Lonely Doug, a Douglas Fir,  at 66 metres is the second tallest of its species in Canada.

It was taller but when the rest of the forest was clear cut around it,  it was left completely exposed to the elements and a storm has since broken off the main top branch.

Sitka Spruce: Port Renfrew, BC… BigTree ID#175 This tree is 82m tall, There is a bigger Sitka Spruce, also on Vancouver Island, tree # 87 which is 96m tall. © TJ Watt

Although the original registry started back in the mid 1980’s counted only the biggest trees, the new version seeks big trees of all of the 50 or so species in the province. Thus a champion of one species might only be 20 metres high, while the champion of another species could be three of four times bigger.

The new big tree registry doesn’t only go strictly by height, rather by a formula counting height, circumference and crown size.

Western Redcedar “Cheewhat Giant”, Pacific Rim NP Reserve, BC ..55m tall, 18.29m circumference… BigTree ID# 84 © TJ Watt

Professor Aitken says the big old trees are important contributors to the forest ecosystem, but due to combined plant and animal life in their crowns, each creates its own individual ecosystem.

She says it appears that the mortality rates of old trees are increasing with climate change and that the registry helps us and citizens monitor the health of these giants over time.

Once people know of a registered big tree, they can advise of changes  such as if it blows over, loses its top, or dies. The registry also produces data on the type of ecosystems that these trees are found in, and this information can guide certain research.

The registry seeks to locate these big trees are so we can conserve them, as a biological legacy of the past, as important members of forest ecosystems today, and for future generations.

BC Big Tree Registry

Climbing Big Lonely Doug

Posted in Environment, Internet, Science and Technology

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