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Roads Division is going
buggy In
an area criss-crossed with so many rivers, streams and wetlands, the
King County Road Services Division must carry out its construction and
maintenance projects with great care. But once a project is done, how do
they measure the impact of the projects on the native species? It turns
out that the best way is to count bugs.The animals living in and around our streams provide the best indicators of that stream’s overall health and ecological condition. Human activities can alter a watershed and interfere with the natural process of a stream, and have immediate as well as long-term effects on the animals that live in the stream. That is why King County monitors the invertebrates since they represent an enormous diversity of life forms, survival strategies and adaptations. Many invertebrates require clear and cool water, adequate oxygen, stable flows, and a steady food source in order to complete their life cycles. These animals in turn, provide food for trout, salmon, herons and kingfishers. Once a year during the fall, Roads Maintenance staffers take samples from sites located within the road right-of-way throughout unincorporated King County. At each sampling site, a one-foot square area of the streambed is manually scrubbed and all loose material is collected downstream in what is called a Surber net. The sampled material is removed from the net and sorted. The samples are then submitted to a laboratory, where each sample is analyzed. Lab workers are counting the number of bethnic macro-invertebrates, which is a diverse group of animals that inhabit the sediment or water. This group includes insects, annelids, mollusks, flatworms and crustaceans. The data provided from these samples is combined with King County’s water quality study data and habitat surveys to determine the health of our local aquatic ecosystem. Ride, then shop and
dine at a discount
Metro smoothes the path to Husky stadium
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