MBSS Site Summary for: AA-N-075-122-97


Located on BACON RIDGE BR UT1 TO UT1 in the South River watershed, 8-digit code: 02131003.
This stream was visited in the spring on 4/23/1997 and again in the summer on 7/9/1997.

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 - 1.0 / 5.0
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 29 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 10.7 %
Forested Land Use 91.1 %


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

Physical Stream Habitat
Instream Habitat 5/20 (Poor)
Epifaunal Substrate 3/20 (Poor)
Velocity/Depth Diversity 3/20 (Poor)
Pool Quality
Pool Extent = meters 		3/20 (Poor)
Riffle Quality 6/20 (Marginal)
Shading 90 %
Embeddedness 100 %
The embeddedness, a measure of silt on the stream bottom, was 100%. This is very high, and may adversely affect biotic communities.
Several measures of instream habitat were considered 'Poor' at this location.


Stream Water Quality:
Water temperature 19.2 ° C
Dissolved oxygen (DO) 7.6 mg/L
pH (lab) 5.65
Conductivity 243 µmho/cm
Alkalinity
(acid neutralizing capacity) 		43.8 µeq/L
Dissolved organic carbon (DOC) 1.5 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 1 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
No Fish Observed 0
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green 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
Leuctra  Rolled-Winged Stonefly 35
Crangonyx Amphipod 16
Parametriocnemus Non-Biting Midges 15
Amphinemura Spring Stonefly 7
Stegopterna Black Fly 6
Cricotopus/Orthocladius Midge 6
Naididae Aquatic Worm 5
Collembola Springtail 5
Dicranota Hairy-Eyed Cranefly 4
Krenopelopia Non-Biting Midge 3
Heterotrissocladius European Non-Biting Midge 2
Lumbriculidae Worm 2
Pisidium Freshwater Pea (Pill) Clam 1
Tubificidae Aquatic Worm 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.