MBSS Site Summary for: GA-A-314-116-96


Located on GLADE RUN UT1 in the Potomac River U N Branch watershed, 8-digit code: 02141005.
This stream was visited in the spring on 4/22/1996 and again in the summer on 7/17/1996.

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 Fair - 3.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 297 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 28.6 %
Forested Land Use 71 %


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

Physical Stream Habitat
Instream Habitat 6/20 (Marginal)
Epifaunal Substrate 2/20 (Poor)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = meters 		5/20 (Poor)
Riffle Quality 2/20 (Poor)
Shading 85 %
Embeddedness 75 %
The embeddedness, a measure of silt on the stream bottom, was 75%. This is relatively high, and may exclude some biota.
Several measures of instream habitat were considered 'Poor' at this location.


Stream Water Quality:
Water temperature 17.8 ° C
Dissolved oxygen (DO) 7.2 mg/L
pH (lab) 6.69
Conductivity 53 µmho/cm
Alkalinity
(acid neutralizing capacity) 		140.2 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 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:
Eastern Gartersnake
Northern Green Frog
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ameletus Combmouthed Minnow Mayfly 18
Paraleptophlebia Blue Quill Mayfly 11
Larsia Non-Biting Midge 11
Zavrelimyia Non-Biting Midges 11
Amphinemura Spring Stonefly 5
Dicranota Hairy-Eyed Cranefly 4
Ephemerella Sulphur Mayfly 4
Parametriocnemus Non-Biting Midges 3
Ostrocerca Stonefly 3
Hexagenia 3
Leuctra  Rolled-Winged Stonefly 3
Pycnopsyche Great Autumn Brown Sedge Caddisfly 3
Heterotrissocladius European Non-Biting Midge 2
Lepidostoma Little Brown Sedge Caddisfly 2
Tanytarsus Non-Biting Midges 2
Acerpenna Tiny Blue-Winged Olive Mayflies 2
Eurylophella Mayfly 1
Brillia Non-Biting Midges 1
Orthocladius Non-Biting Midges 1
Isoperla Stripetail Stonefly 1
Hexatoma Crane Fly 1
Phylocentropus Caddisfly 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.