From an article I wrote in 2012 for the Red Deer River Naturalist newsletter.
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At the Grand Canyon, 8500 feet above sea level is a tourist walk. |
As a
long-time hiker of our Canadian Rockies, I couldn't help but recognize the
importance of altitude in the creation of the different mountain eco-zones. I
also understood(at least in theory) the correlation between altitude and
latitude. Climbing up a mountain is very similar to traveling North toward the
Arctic circle. The two trips that my wife and I took this past summer really
brought this idea home to me and allowed me to actually experience some of the
things that I have heard and read.
In mid-July
we pulled our trailer West to Alberta's Kananaskis Country for our customary
two weeks of camping and hiking. It had been a few years since we had a chance
to be in the Rocky mountains during the peak flower season and I was savoring
the experience.
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The kind of signs one might see in the Montane Zone |
The one
thing that almost all of our hikes share is a gain of altitude and ascendant
eco-zones. Low zone on the totem-pole in the Canadian Rockies is the Montane
zone. This is the one that most casual visitors to Banff are familiar with.
There are lots of trees -typically pine and spruce. There are also plenty of
larger animals and people, with their roads, railroads, towns, resorts and
campgrounds.
As you hike up and out of the valley bottoms
you notice that the kinnikinnick which carpets the understory is replaced by
feather mosses and the trees are more typically Engleman Spruce, subalpine fir,
white-barked pine and perhaps Lyall's larch. Also there are fewer trees and
more meadows. As you gain altitude there become even less trees and the ones
that you do see tend to be smaller. They often occur in groups of stunted trees
huddled together known as "Krummholz".
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Three Lakes Valley - entering the subalpine/alpine zone. |
As you climb
even higher you may enter into the alpine zone. Meadows in this zone contain no
trees. Plants and flowers tend to be small and very low to the ground.
Subalpine and alpine areas may contain less familiar creatures such as the pika
and hoary marmot. The Clark's nutcracker replaces the gray or Canada jay of the
montane forest. I always feel privileged to visit the alpine zone, but I know
it is (by necessity) for a short period. The month of year and the time of day
leave small windows, where I can comfortably spend time in the alpine. Whenever
I am there, I make the most of it. I endeavor to take in all the sights, sounds
and scents before I trudge back down the mountain.
One of the
hikes we did this year(for the first time ever) was a trip up Plateau Mountain,
located in the southern most part of K- Country. Unique in the Rockies, this
mountain is indeed a high plateau, and its flat summit contains a large alpine
area. In one area of the summit, we observed rocks arranged in polygon patterns
on ground. I have never been to the arctic, but I have seen in films and
books where this same phenomena occurs
as a result of the action of permafrost just under the surface of the tundra.
In
Kananaskis country, tree-line is about 2300 metres or around 7500 feet above
sea level. Above this altitude is the alpine zone. As one makes their way
further north the tree-line becomes lower and of course it is higher the more
you head south... I realized this fact, but it wasn't until a trip South to the
North rim of the Grand Canyon that I ever really experienced it for myself.
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In the Canadian Rockies, 8500 feet above sea level certainly isn't a tourist walk. |
It was part
of our first summer trip of 2012 to
the beautiful Southwest United States. We were staying in the town of Kanab in
Southwest Utah and one day (in late May) we drove further south into Arizona
through what is typical of the desert - sand and sandstone interspersed with pinion pine
and Utah juniper. Imagine the cartoon loop through which Wile E. Coyote chases
Roadrunner - this might give you the idea of the terrain, if you've never been.
As the road began to climb, I noticed a sign "6500 feet above sea level".
There were more trees. We began to see a forest of Ponderosa pine such as you
might see in the Rocky mountain trench of Southeastern British Columbia. I saw
one more sign; "7200 feet". That really got me thinking. "If I
was in Alberta..."
Our first
visit to the North Rim of the Grand Canyon was extremely enjoyable and in the late
afternoon we attended a lecture on the geology of the canyon. The speaker began
by asking if any of the people there had been to Glacier National Park in
Montana and most of the crowd put up their hands. Then she told us that we were
all sitting atop the Colorado Plateau at an altitude of 8500 feet above sea
level - higher than almost every mountain summit in Glacier. We were a thousand
feet above Alberta's tree-line and yet we had a spruce forest all around us.
From bottom to top, the Grand Canyon also has layered ecosystems of its own.
Sonoran to Hudsonian, they are representative of those from Mexico to Canada.
A visitor
from the east once told me (after a brief visit) that he personally didn't like
the mountains. I was incredulous and replied that if you don't like the
mountains where you are, just walk up a few hundred feet and look around at a
whole different environment and if you don't like that continue on up... The
ecosystems of the Rocky Mountains are
the nature of Canada in microcosm; foothills and parkland, montane and boreal , subalpine and hemi arctic, alpine
and arctic - the correlation may not be exact, but it is a close enough model
for this layman. Perhaps one day I will visit the Arctic and gain a better
understanding of an aspect of the natural world that has fascinated me
throughout my life.