Blackberry Invasive Species

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On Saturday November 1st, a peer and I attended Green Seattle Partnership’s “Autumn’s Fury” Work Party from 10am to 2pm at East Park entry on the corner of 21st Avenue East and East Interlaken Boulevard. Upon arrival we were instructed by Kari Olson to cut and pull non-native invasive species of plants, which included the Himalayan blackberries, evergreen blackberries, and Clematis. We were also very careful as to not harm the native species - especially the native blackberry that closely resembled the non-native blackberries, other than the fact that its stem had more of a silver hue. These invasive plants were found growing over and around many of the native trees and shrubs taking up a lot of space and sunlight. The Himalayan blackberry is a highly invasive species that is difficult to …show more content…

They were first introduced for fruit production, but have now naturalized and spread throughout the Pacific Northwest. The blackberries cover the ground so quickly that they prevent the growth of native trees such as the Pacific Madrona, Douglas Fir, and Western White Pine. Those of which are species that require the sun’s rays for germination. Another problem related to these plants is that their short roots lack the deep, bank stabilizing power of native wetland shrubs and trees leading to ground degradation (King County Noxious Weeds). Once we pulled one of these invasive plants out of the ground, Kari told us to bend the stems in half every foot or so down. I asked what the purpose of doing this was and she said, “When you bend the stem like this, it breaks the plant tissues and stops respiration throughout the plant, which speeds up the decomposition process.” After an hour and a half of this we took a break to eat lunch and move on to the

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