Natural Resources Paper

Natural Resources and energy Natural Resources and energy The Columbia River use to have the or so prolific pink-orange eliminates in the world, today its salmon runs ar less than ten percent of what they were. Historically it is estimated that more than sixteen million salmon ran up the Columbia (native tiltsociety.org).Today it is considered a candid year if a run is a million fish. everywhere fishing, logging, agriculture, and manmade islands that harbor predators have decimated the salmon runs in the Columbia. The historic salmon runs in the Columbia were larger than any other river on earth. In the 1860s the first salmon cannery open on the lower river. By the 1880s the salmon canning industry had 39 canneries operating on the lower Columbia. pooh-pooh River canneries were supplied with salmon by around a thousand gillnet boats. The salmon industry back up 6,000 employees. In the 1880s the combined output from the canneries was 629,000 cases of salmon with for each one case possessing 48 one pound cans (oregonstate.edu). However, not hanker after the prolific salmon runs crashed, the amount of returning fish could not support the canneries. The last major cannery on the Columbia, the botch up Bee facility in Astoria closed in 1980.

Today on that point are still a few microscopical dress shop canning operations, but the pack is small, specialized, and expensive compared to the output of the industry that was at one time the main economy on the Lower Columbia (oregonstate.edu). Another major contributor to the dwindling salmon runs is over logging. Logging along Lower Columbia tributaries has resulted in degraded spawning habitat. Roads and clear cuts create silt run off that damage spawning grounds in the small creeks and streams. Futhermore, the qualifying of vegetation along the streams causes water temperatures to rise, often lethal to salmon. Culverts apply to build logging access roads over the small streams block salmon from migrating up them to spawn. The other major flagellum to Columbia River salmon... If you want to get a full essay, station it on our website: Ordercustompaper.com

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