Protecting and Restoring the Morro Bay Estuary.
Harold J. Miossi Charitable Trust

Bioassessment 2020: Highlights from the Season

Giant Water Bugs, also known as “Toe-Biters,” are large invertebrate predators with a powerful bite! Females typically deposit their eggs onto the males’ back, and the male “Toe-Biter” keeps the eggs safe until they hatch.

  As many of our readers and volunteers know, our spring bioassessment season is one of the major monitoring efforts of the year. We use a state-wide protocol that includes detailed habitat measurements and macroinvertebrate collection to assess creek health. Volunteers are an integral part of this effort. Our volunteers come to us from all walks of life, from seniors to college students and everything in between. We kick off the season with an orientation, and then volunteers join us on our surveys. Each season we usually have about 20 volunteers helping us monitor ten sites, collecting over 1,000 data points per site. Spring 2020: a …

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Bioassessment Survey Results 2019: Tracking the Health of Local Creeks

Two volunteers wear waders and dark red plaid shirts. The one on the left holds an algae-covered rock that is about 12 inches long. The volunteer on the right uses a red ruler to measure the width of the rock. The data that they collect will be used to calculate the overall bioassessment survey results for the year.

  What we learn from bioassessment survey results One of the goals of the Estuary Program is to monitor the bay and the lands that surround it to better understand conditions and how they are changing over time. As part of this effort, the Estuary Program conducts spring bioassessment surveys. This data allow us to assess the health of our creeks and determine if they support sensitive aquatic life. What we collect during bioassessment surveys Each spring, staff and volunteers head out to local creeks to collect habitat measurements such as the depth of the water, the size of the …

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Spring Bioassessment – Join the Team!

Estuary Program staff complete a habitat assessment during a bioassessment survey in 2015.

  Each spring, the Estuary Program and our volunteers engage in a bioassessment monitoring effort at a variety of sites along local creeks. This monitoring process follows a detailed protocol to collect habitat data and samples of macroinvertebrates or “macros,” which are insects that are visible to the naked eye. Some macros are very sensitive to pollution, so if you find them in a creek, you know that the water quality is good. This water penny, for example, is found in the creeks in our watershed. It spends from one to two years of its life cycle in this larval …

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