Results from Biological Monitoring events and identification by CSI volunteers.
The metrics used are explained first, and then results are shown with the most recent year on top. For more details about locations, or to see chemical monitoring data for the sites, visit the Database.
Explanation of Metrics:
Once the benthic macroinvertebrates in the sample collected from the stream have been identified under the microscope to the level of order and family, they can be used to assess the health of the stream as a home for aquatic life. The assessment is based on which orders and families of insects are present and how well they tolerate pollution.
Click on the tabs below to explore the various metrics used to evaluate stream health.
[accordion_item active=”” icon=”” title=”Total Family Richness” accordion=”accordion”]
A count of the number of different families of aquatic insects in the sample. It is an indication of how diverse the macroinvertebrate community is in the stream. The more different families of insects there are (higher richness), the healthier the stream.
Macroinvertebrate families vary widely with respect to how well they tolerate pollution. Some are very sensitive to pollution while others are quite tolerant of polluted conditions. This metric is based on the pollution tolerance of families of benthic macroinvertebrates on a scale of 0 to 10.
A count of the total number of macroinvertebrate families of mayflies (Ephemeroptera), stoneflies (Plecoptera), and caddisflies (Trichoptera) found in a sub-sample. These three orders of macroinvertebrates are considered to be mostly clean-water organisms, and the presence of several families from these three orders is generally correlated with good water quality.
[accordion_item title=”Percent Model Affinity” accordion=”accordion”]
The New York State Department of Environmental Conservation has established what a typical, or model, community of benthic macroinvertebrates looks like in a healthy, non-impacted stream in New York. The Percent Model Affinity metric indicates how similar your BMI sample is to the model New York BMI community as defined by NYSDEC. It is based on the relative abundance of 7 major groups of benthic macroinvertebrates.
This metric combines Total Family Richness, Family Biotic Index, EPT Richness and Percent Model Affinity in a single metric called the Biological Assessment Profile (BAP). Each of these four metrics is converted to a value from 0 to 10 using a mathematical equation. The four converted values are averaged, and the average represents the overall water quality for the sampling location.
West Branch Cayuga Inlet tributary
42.35949 N, 76.598485 W
just upstream of Main St. bridge near Trumbulls Corner *Note: Probably not all organisms were pulled from the sup-samples of
each replicate. Sorting was done during a 45 minute period and may not have been complete*
42.447921 N, 76.501958 W
just downstream of Hancock St. Bridge near Sciencenter
Tier 2 Protocols used
N/A – Tier 2 Protocols Used
moderately impacted Major Group Biotic Index
N/A – Tier 2 Protocols Used
42.63573 N, 76.6343 W
Atwater Rd. west of Lake Rd. *Note: Physical habitat may not have been ideal for sampling. It is difficult to tell if this affected the results. Volunteers plan to sample a nearby, more ideal location this year to evaluate stream health.