Benthic Macroinvertebrates (BMIs)

What are BMIbenthic macroinvertebrates are streambed organisms often used to monitor the health of a stream.'s and why do we monitor them?

"Aquatic insects and other invertebrates are the most common form of animal life in streams. They live among algae, aquatic plants, and many microscopic organisms (like bacteria) in surface water. Macroinvertebrates (those invertebrates visible to the unaided eye) play many roles in the aquatic food web--they help break down organic debris, recycle nutrients, and provide food for fish, amphibians, and riparian birds. Some of these organisms can live and even thrive under polluted conditions, but many others require clean and cold water to survive. The variety and types of organisms present are indicators of the health of the stream." --from California Streamside Survey, An Introduction to Using Aquatic Invertebrates as Water Quality Indicators<.

"The California Stream Bioassessment Procedure (CSBP) is a standardized protocol for assessing biological and physical/habitat conditions of wadeable streams in California. The CSBP is a regional adaptation of the US EPA's Rapid Bioassessment Protocols.... The CSBP is a cost-effective tool that utilizes measures of the stream’s BMIbenthic macroinvertebrates are streambed organisms often used to monitor the health of a stream. community and its physical/habitat characteristics to determine the stream’s biological and physical integrity." --from the California Stream Bioassessment Procedure< (attached below).

Monitoring BMIs in Sonoma Creek Watershed
Please note that not all Sonoma Creek BMIbenthic macroinvertebrates are streambed organisms often used to monitor the health of a stream. monitoring is yet reflected in the attachments below. Please search the entire Knowledge Base for "BMIbenthic macroinvertebrates are streambed organisms often used to monitor the health of a stream." to find all available information.

--2000-2002: SECSonoma Ecology Center is a not-for-profit organization located in the Sonoma Valley. http://sonomaecologycenter.org initiated the full CSBP program in Sonoma Creek main stem and tributaries, to: 1, provide baseline information on macro invertebrate assemblages; 2, evaluate conditions and biological integrity using the Northern California Index of Biological Integrity; and 3, provide recommendations for future monitoring. Eleven monitoring stations were established and sampled during 1, 2, or 3 consecutive years (2000-2002).
--2006: SECSonoma Ecology Center is a not-for-profit organization located in the Sonoma Valley. http://sonomaecologycenter.org sampled at the 11 original sites, along with 3 additional sites using an updated protocol available online from CDFGCalifornia Department of Fish and Game's Aquatic Bioassessment Laboratory. See reports at http://knowledge.sonomacreek.net/node/45< and http://knowledge.sonomacreek.net/node/288< for summaries of methods used and results obtained up to 2006.
--2012: SECSonoma Ecology Center is a not-for-profit organization located in the Sonoma Valley. http://sonomaecologycenter.org sampled at 13 sites. The approved QAPP was modified to identify organisms to taxonomic order, instead of to species.

Years Monitored: 
2000, 2001, 2002, 2006, 2012
AttachmentSize
BMI Monitoring Protocol210.38 KB
spreadsheet: 2012 BMI data by site39.6 KB
graph: Shannon-Wiener Biodiversity Index of BMI for all available years600.72 KB
graph: EPT index by site for 2012 data297.08 KB
graph: BMI diversity comparison between healthy and unhealthy sites170.2 KB

Benthic Macroinvertebrates (BMIs) data, by Station

There are no stations with data