MBSS Site Summary for: CORS-107-X-2005


Located on Three Bridges Branch UT2 in the Corsica River watershed, 8-digit code: 02130507.
This stream was visited in the spring on 4/27/2005 and again in the summer on 8/24/2005.

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 N R
Benthic IBI Poor - 2.1 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area No data available 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 No data available
Agricultural Land Use No data available
Forested Land Use No data available


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

Physical Stream Habitat
Instream Habitat 10/20 (Marginal)
Epifaunal Substrate 9/20 (Marginal)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = 68 meters 		10/20 (Marginal)
Riffle Quality
Riffle Extent = 7 meters 		11/20 (Suboptimal)
Shading 85 %
Embeddedness 55 %
The embeddedness, a measure of silt on the stream bottom, was 55%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 21.1 ° C
Dissolved oxygen (DO) 6.1 mg/L
pH (lab) 7.47
Conductivity 226 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1014.281 µeq/L
Dissolved organic carbon (DOC) 8.8623 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 9 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Tessellated Darter 259
Eastern Mudminnow 60
Creek Chubsucker 34
Fallfish 32
American Eel 12
Pirate Perch 10
White Sucker 3
Black Crappie 1
Green Sunfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Green Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladius Non-Biting Midges 67
Gammarus Amphipod 7
Tanytarsus Non-Biting Midges 6
Orthocladiinae Midge 5
Thienemannimyia group Non-Biting Midges 4
Polypedilum Non-Biting Midges 2
Paratendipes European Non-Biting Midge 2
Caecidotea Isopod 2
Oecetis Long-Horned Caddisfly 1
Tubificidae Aquatic Worm 1
Probezzia Biting Midges 1
Rheosmittia Non-Biting Midges 1
Viviparidae Mystery Snail 1
Stictochironomus Non-Biting Midge 1
Pisidiidae Pill Clam 1
Lumbriculidae Worm 1
Bithynia 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.