City Creek Nature Notes – Salt Lake City

September 20, 2016

August 31st

Peak Production

6:30 p.m. The canyon has passed its peak productivity. In the first two miles of the canyon, all the red fruit of a chokecherry bush (Prunus virginiana L.) has ripened to a dark purple. Box elder trees (Acer negundo L.) hang heavy with their helicopter seed pods. The white fruit of an unidentified berry bush extrudes vanilla smelling juice when squeezed. All thistles have bloomed into hairy grey tufts. Gambel’s oaks are dropping numerous acorns on the road. green crabapple trees, planted by the pioneers every third of a mile, are ripening fruit. Horsechestnut trees (Aesculus hippocastanum L.) are full of their green spiked seeds. Where is City Creek Canyon Road intersects Bonneville Drive, the mud flat in the stormwater pond is filled with 8 foot tall cattails (Typha latifolia L.) that are beginning to bloom. Along the pipeline trail, only one or two small birds are heard.

At meadows, grasses and weeds are parched varying shades of tan to dark brown. At one seep near mile 1.3, trees at its top are green and healthy while at the bottom all the water has been taken from the ground and the manzanita bushes (Arctostaphylos manzanita P.) are shriveled. Even for healthy Gambel’s oaks and cottonwood trees (Populus angustifolia James or Mountain Cottonwood), the unrelenting sun has burnt leaves on the top branches a curled brown. To escape the heat, the Box Elder trees on west facing slopes are turning their autumn pale red and light brown. But box elders with an adequate water supply on the canyon bottoms are still green.

Producers having peaked, the reducers now take over. In the scrub oak forest and in the meadows, crickets have multiplied. In the first two miles, I see five adolescent squirrels and hear another five scurrying through the brush. They have begun gathering and storing acorns for the coming winter.

 

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