MBSS Site Summary for: QA-N-010-107-95


Located on THREE BRIDGES BR UT1 in the Corsica River watershed, 8-digit code: 02130507.
This stream was visited in the spring on 3/20/1995 and again in the summer on 7/20/1995.

Index of Biotic Integrity (IBI) Results:

An Index of Biotic Integrity (IBI) is a scientific tool used to identify and classify stream health. An IBI associates anthropogenic influences on a stream or with biological condition in the stream, and is formulated using data developed from biosurveys.
Details on the development and application of MBSS IBIs are in this document.
Fish IBI Poor - 2.3 / 5.0
Benthic IBI Good - 4.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 97 acres Cows standing in a stream at a site with high agricultural land use. Cows survey the sampling procedure at this extreme example of a highly agriculturalized site.
Urban Land Use 0 %
Agricultural Land Use 59.3 %
Forested Land Use 40 %


Stream showing woody debris, logs, and rocky substrate.
An example of woody debris in a stream.

Physical Stream Habitat
Instream Habitat 9/20 (Marginal)
Epifaunal Substrate 11/20 (Suboptimal)
Velocity/Depth Diversity 5/20 (Poor)
Pool Quality
Pool Extent = meters 		11/20 (Suboptimal)
Riffle Quality 6/20 (Marginal)
Shading 70 %
Embeddedness 10 %


Stream Water Quality:
Water temperature 20.7 ° C
Dissolved oxygen (DO) 8.6 mg/L
pH (lab) 6.49
Conductivity 232 µmho/cm
Alkalinity
(acid neutralizing capacity) 		362.6 µeq/L
Dissolved organic carbon (DOC) 3 mg/L

Biological Stream Condition:

Surveys of the organisms living within a stream can give indications of stream health. Species richness, or the number of different species present, as well as indicator species (species whose presence, absence or abundance can serve as a measure of environmental conditions) are informative for stream health. 		Close-up of a mayfly indicator species.

Fish Survey Results:
The following 3 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 241
Tessellated Darter 33
American Eel 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Box Turtle
Northern Green Frog
Northern Watersnake
Pickerel Frog
Southern Leopard Frog

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Diplectrona Net-Spinning Caddisfly 37
Eukiefferiella Non-Biting Midges 14
Larsia Non-Biting Midge 11
Paraleptophlebia Blue Quill Mayfly 10
Stenonema Flatheaded Mayfly 10
Cricotopus/Orthocladius Midge 9
Thienemannimyia Non-Biting Midges 4
Trissopelopia Non-Biting Midges 4
Acerpenna Tiny Blue-Winged Olive Mayflies 4
Eurylophella Mayfly 3
Stegopterna Black Fly 2
Pseudolimnophila Crane Fly 2
Sublettea 1
Prosimulium Black Fly 1
Nigronia Megaloptera (Dark Fishfly) 1
Limnephilidae Northern Casemaker Caddisfly 1
Ephemerella Sulphur Mayfly 1
Micropsectra Non-Biting Midges 1
Polypedilum Non-Biting Midges 1
Thienemanniella Non-Biting Midges 1
Corixidae Water Boatman 1
Corynoneura Non-Biting Midges 1
Kick net sampling for macroinvertebrates.
Sampling with a kick net.

Information disclaimer: The information and data on this page is for guidance and general planning purposes only. It should not be used to make decisions on specific matters.