Land Use History: Ravenna
Park is widely known for its history and how not to care for natural areas.
Somehow Ravenna Park escaped the logging operations in the late 1800s, and was
adopted and privately owned by the couple William and Louise Beck (Blecha, P).
For many years the couple preserved the momentous and beautiful Douglas Fir
trees and flaunted the mineral springs and their supposed health qualities. The
couple was known for changing the name of the park every couple of years. From
Big Tree Park, Twin Maples Lane, Ravenna Natural Park, and finally landing on
Ravenna Park. Unfortunately, in 1911 the city of Seattle bought the park from
the Beck’s destroying quite a bit of its beauty. The city cut down the well-known
Douglas Firs and lowered the lake that fed into the stream, slowing down the
pace and displacing many aquatic invertebrates.
Plants: Identifying
plants was easily my favorite aspect of this course. Not only because I found
it to be the easiest, but because it gives you a whole new idea of “being aware
of your surroundings.” I highly recommend not only being able to identify the
plants around you, but to also be able to state their uses. For example, before
the class I would have never known that sword fern helps relieve the pain from
stinging nettle. A remedy that certainly came in handy when I found myself
surrounded by stinging nettle on my trip to Whidbey Island. You should also be
able to tell the history of that plant. For example, the Western Red Cedar was
called “The Tree Of Life” because it was used to produce just about everything
from canoes to clothing. Cattails were used to weave baskets and make brushes.
While
identifying trees, you should always look at the pines. Ponderosa Pines have
three needles per bundle while Western White Pines have five per bundle.
Another key feature to observe is the leaves of the trees. For example, the Red
Alder has alternate branching leaves, while Big Leaf Maple has opposite branching leaves. You can also look at the lobes of
the leaves. Big leaf maple typically has five lobes on each leaf. For pine
trees, which often look similar to the amateur eye can be differentiated by the
way the pines lay on the branches.
You can
find all of these plants and trees all over Ravenna Park but you can a particularly
large patch of Horsetails at Station 1. Horsetails typically grow near watery
areas such as rivers, marshes, and streams, which is why you’ll find station 3
less than one meter away from the Ravenna stream. The horsetail has no leaves
or flowers. When it’s in its first stage of growth the horsetail appears as a
hollow stem, resembling an asparagus. In the second stage of growth thin green
barren stems branch out of the plant. Horsetails are commonly used by
herbalists to treat kidney and bladder problems. For more information on
horsetails go to
http://www.encyclopedia.com/topic/horsetail.aspx
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Horsetails |
EDIBLE AREAS (choice
station): At station four you’ll find my favorite shrub, Salmonberry. With
it’s five leaflets per branch and bright pink flower, it’s almost impossible to
miss in Ravenna’s sea of green shrubs. You’ll find Salmonberry at station 2,
about 2.5 meters from the horsetails at station 1.
One of my
favorite aspects of the Salmonberry is its native history. According to
storytellers in the Chinook First Nation the coyote was “instructed to place
these berries in the mouth of each salmon he caught in order to ensure
continued good fishing” and for that reason this berry came to be known as the
Salmonberry (Pena, D). Others argue that the name comes from the fact that the
salmonberry closely resembles the salmon egg. Because the salmonberry is native
to the Pacific Northwest it has certain political restrictions around its
harvesting, cultivating, and processing. Among the Coast Salish peoples,
certain families have rights and reservations to the first and second rounds of
harvesting.
Besides
consumption, the salmonberry is known for it’s medicinal and material uses. If
you make the bark and leaves into tea, the tea can help with digestive issues
such as diarrhea and dysentery. The Makah are known to use the salmonberry
brambles to make tobacco pipes. The Kaigani Haida people are known to line
baskets with the salmonberry plant.
For more information on the salmonberry plant go to
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Dust lichen |
Lichen/Fungi: At
station 3, about 4 meters across the trail from station 2 you’ll find a Western
Red Cedar with Dust Lichen. You will most commonly find dust lichen on shaded
and sheltered bark, or sometimes on vertical rock outcrops in humid sites.
Although they’re easy to identify as a group, dust lichen have many different
sub species that almost impossible to identify with the naked, untrained eye (Pojar,
J., MacKinnon, A., & Alaback, P. B.).
There are
seven different growth forms of lichen: dust, crust, scale, leaf, club, shrub,
and hair. When telling the difference between a crust and a dust lichen you’ll
notice that they’re both closely attached but dust lichen is composed of tiny,
powdery balls, while crust lichen has a clear upper surface and no visible
lower surface.
Some say
lichen are like the fungi that discovered agriculture (Pojar, J., MacKinnon,
A., & Alaback, P. B.). Instead of invading and scavenging like other fungi,
lichen cultivate within themselves. A lichen is the physical manifestation of a
fungus providing protection to the alga from the elements of nature.
Invertebrates:
Searching and observing for invertebrates requires the patience and dedication
of bird watching, but with the added necessity of getting down into the dirt
and sometimes getting your feet wet. While looking for invertebrates I was
required to really test my patience and willingness to face my fear of bugs. I
went crawling through bushes, digging around soil, and picking up rocks in the
stream. The strategy I found the most rewarding was picking up rocks in the
stream, not because it’s the easiest, because it by far isn’t, but because I
find the water invertebrates to be the most interesting.
The invertebrates I had the most
fun searching for at station 4 were surprisingly the stream invertebrates. Stream
invertebrates are commonly used to indicate the quality of water. The steam
invertebrates can be divided into three different taxa based on the quality of
water. You will find taxa one strictly in good quality water due to the fact
that they are not pollution tolerant invertebrates. The faster the stream is
going, the cleaner the water will be. The slower the stream is going, the more
polluted the water will be. Group two taxa is tolerant of polluted waters, but
can also live in cleaner areas of the stream. You can find group two taxa in
moderately polluted water. Group three taxa is completely tolerate of polluted
waters so you will find them in the slower, more polluted parts of the stream.
While searching around the stream,
it is important to be very gentle with everything you do so you can disrupt the
ecosystem as little as possible. When you pick up a rock make sure to very
gently replace it exactly where you found it. After turning over many rocks, I
was able to find a Midge Fly Larva and a leech. Both are part of group three
taxa and I was in a slower part of the stream, indicating that I was in a more
polluted part of the stream.
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Drawing of the crane fly I found at another station |
Birds: If you’re
anything like me, bird watching will not be your strong suit. You won’t be able
to effectively or efficiently find birds by tasting, smelling or touching. That
leaves you with seeing and hearing, and when you’re looking for small birds in
a very large area, your sight won’t be all that helpful. Bird watching isn’t
actually so much about the watching, but about the listening. While in my sight
I found it easiest to just sit, close my eyes, and listen for anything that
could hint to a bird nearby. This doesn’t necessarily mean listening for
birdcalls. If you decide to just listen for the calls most calls are too
difficult to hear over the sound of the city or as I quickly found out, the
crows. So while you’re sitting, try to ignore the honking of cars and the
“Cawing” of crows and listen for things like movement in the bushes and trees
nearby.
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Red Winged Blackbird |
Most of the identifications I made
were within 5-10 meters away. From station 5 I was able to hear the
brushing of a Song Sparrow in a nearby bush. If you’re having trouble
identifying the bird by it’s song, try looking at it’s features. For example, I
was able to identify the Bewick’s Wren because of its upright tail feathers.
Also pay close attention to the coloring and markings of the bird, I’m fairly
new at bird watching so at first I got the Pacific Slope Flycatcher confused
with the Wilson’s Warbler because they’re both green. I was soon able to figure
out that the Pacific Slope Flycatcher was more of a greenish/grey and the
Wilson’s Warbler has a black mark on it’s head.
Animal Behavior (Station 6): After
bird siting I went down the trail to the right and found almost half of a dozen
American Crows bathing in the stream. Although I normally despise crows, it was
nice to see them calm and sitting still instead of hopping around and cawing.
The crows were all bundled together within about 3-4 meters of each other. Some
of the crows weren’t even bathing; they were just watching the other crows from
the branches above.
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Crow Bathing |
While I was
watching the crows, I heard a song sparrow’s high trills and buzzes in a nearby
tree. I searched the surrounding area to find the song sparrow and after what
felt like forever of frantically looking in nearby branches I found the song
sparrow on a higher up branch about 3 meters away. Because the song sparrow
didn’t want to give the location of it’s nest away. Song sparrows are known for
being territorial, something that I learned quickly while in this class. Again,
bird watching takes a lot of patience so even though this sounds like a quick
interaction it really took approximately 15-20 minutes.
Geology/Geomorphology:
While I was watching the crows bathe
in the stream, I could see an erratic off in the distance. Erratics are
basically large boulders that could have only been moved by something as heavy
and strong as a glacier. The erratic I found at station station 7 was moved
there by the Vashon glacier, also known as the Cordellion Ice Sheet. The Vashon
glacier retreated about 15,000 years ago and while it was retreating it had the
power to push boulders so large that it’s almost impossible to move them any
other way.
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Vashon Glacier Erratic |
Visible Ecological
Interaction: At station 8, on your way back up the trail from the erratic
at station 7 you’ll find a patch of sword fern on the left side of the trail.
On one of those sword ferns I was able to find a spider web that was woven
between the sword fern’s fronds. You’ll actually be able to see this
interaction all over the park because it’s quite common for spiders to weave
their webs on all sorts of ferns.
Within the spider’s web you will be able to find flies that
had been trapped in the sticky web, waiting to be consumed by the spider.
Within this
web we were able to see multiple ecological interactions: the sword fern
obtaining nutrients from the soil, the spider building it’s habitat on the
sword fern, and the fly getting stuck in the sticky web, waiting for it’s
death. You can find numerous interactions just like this all over Ravenna park.
For example, you can probably look at any big leaf maple to find that it has
moss on it and most likely has lady fern growing out of it. The moss absorbs
water and stores it for the hotter months, when the big leaf maple will then
need it due to the fact it can’t hold moisture well.
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Spider's Web on top of a Sword Fern |
Effects of Ecological
Disturbance: One thing I never considered about pollution and global
warming was how it has been affecting our plant species. There are countless
species that have been edged out by the high amounts of CO2 and other toxins in
the air. While at my site I was able to find a banana slug, unknowing of how
rare it is I continued on my way after drawing a picture of it. This is a prime
example of how human interaction with nature needs to slow down so we can fully
appreciate the beauty and rarity of organisms around us.
One species
that has been highly affected by pollution is lichen. Certain species of lichen
are specifically susceptible to sulfur dioxide. Due to the high toxicity of
Seattle’s hair it will be near impossible to find Common Witch’s Hair in the
greater Seattle area, even though it’s common on coastlines. If you were
looking for Common Witch’s Hair you would have a much easier time finding it
along the Olympic peninsula near the Olympic Mountains in a quieter, less
densely populated area. For more information on how lichen are affected by
pollution go to
https://staff.concord.org/~btinker/gaiamatters/investigations/lichens/affectslichens.html
Sources Cited:
Blecha, Peter. "Ravenna Park
(Seattle)." HistoryLink.org- the Free Online Encyclopedia of Washington
State History. N.p., 23 Jan. 2011. Web. 08 June 2016.
Pojar, J., MacKinnon, A., & Alaback,
P. B. (1994). Plants of the Pacific Northwest coast: Washington, Oregon,
British Columbia & Alaska. Redmond, WA: Lone Pine Pub.