MBSS Site Summary for: GA-A-518-220-97


Located on GAP RUN in the Youghiogheny River watershed, 8-digit code: 05020201.
This stream was visited in the spring on 4/8/1997 and again in the summer on 8/28/1997.

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 Fair - 3.5 / 5.0
Benthic IBI Good - 4.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 1,530 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0.3 %
Agricultural Land Use 40.2 %
Forested Land Use 58.9 %


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

Physical Stream Habitat
Instream Habitat 13/20 (Suboptimal)
Epifaunal Substrate 7/20 (Marginal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = meters 		15/20 (Suboptimal)
Riffle Quality 15/20 (Suboptimal)
Shading 90 %
Embeddedness 0 %


Stream Water Quality:
Water temperature 18.5 ° C
Dissolved oxygen (DO) 8.4 mg/L
pH (lab) 7.62
Conductivity 250 µmho/cm
Alkalinity
(acid neutralizing capacity) 		764.3 µeq/L
Dissolved organic carbon (DOC) 1.2 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
Blacknose Dace 85
Creek Chub 15
Brown Trout 5
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Acerpenna Tiny Blue-Winged Olive Mayflies 32
Ephemerella Sulphur Mayfly 29
Paraleptophlebia Blue Quill Mayfly 22
Haploperla Green Stonefly 6
Isoperla Stripetail Stonefly 4
Epeorus Mayfly 4
Conchapelopia Non-Biting Midges 3
Tvetenia Non-Biting Midges 3
Parametriocnemus Non-Biting Midges 2
Hydropsyche Net-Spinning Caddisfly 2
Blepharicera Net-Winged Midges 2
Leuctra  Rolled-Winged Stonefly 2
Rhyacophila Free-Living Caddisfly 2
Dicranota Hairy-Eyed Cranefly 1
Neophylax Caddisfly 1
Pseudolimnophila Crane Fly 1
Stenonema Flatheaded Mayfly 1
Tanytarsus 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.