Blog‎ > ‎

Saturday October 16, 2005 Monitoring Report

posted Oct 10, 2012, 10:53 PM by Derek Brown   [ updated Oct 10, 2012, 10:57 PM by Lfp StreamKeepers ]
Regular Quarterly Water Testing - At 9AM Saturday morning October 15 we once again had a good turnout for the quarterly Chemical monitoring event. Again the chemistry of our streams looks to be in good shape. The data has been collated and can be found at under the data page on this web site.

Macroinvertebrate Sampling - On October 1, after much preparation, two groups of volunteers visited two sites on each stream and collected macroinvertebrate samples that were then sent to be professionaly evaluated. When the samples have been analyzed we will post the data on the data page of this web site.

Why do Macroinvertebrate sampling? The best way to assess the health of a watershed for living things is to look at those living things. Undisturbed watersheds in the Pacific Northwest contain a marvelous variety of benthic macroinvertebrates, representing a smorgasbord of shapes, sizes, survival strategies, and adaptations. Human activities that interfere with natural processes in a watershed have a definite and predictable impact on the types and numbers of invertebrates that live here.

Many invertebrates are just as sensitive to changes in their environment as salmon. We tend to be more interested in fish than invertebrates rather than or along with fish.

It is easier and less intrusive to the environment to sample invertebrates. Whereas anadromous fish are impacted by a variety of factors such as ocean conditions and fishing pressures, stream invertebrates are primarily impacted by activities within their watershed.

Since invertebrates are an important food source for fish (and other wildlife), sampling them measures an environmental component with a direct impact on fish. Undisturbed streams have such a great variety on invertebrates that sampling can reveal subtle disturbances over space and time.

Fecal Coliform Testing - We are continuing the bacterial monitoring that was started in the spring: See the data posted on the data page of this web site