MBSS Site Summary for: PRUN-103-R-2001

Site Photos

Field photo showing stream conditions at site PRUN-103-R-2001-1 (Opens in a new window) Field photo showing stream conditions at site PRUN-103-R-2001-2 (Opens in a new window)

Located on FOLLY RUN in the Potomac River U N Branch watershed, 8-digit code: 02141005.
This stream was visited in the spring on 3/28/2001 and again in the summer on 8/16/2001.

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 Good - 4.0 / 5.0
Benthic IBI Fair - 3.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 2,079 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 7 %
Agricultural Land Use 5 %
Forested Land Use 87 %


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

Physical Stream Habitat
Instream Habitat 18/20 (Optimal)
Epifaunal Substrate 17/20 (Optimal)
Velocity/Depth Diversity 15/20 (Suboptimal)
Pool Quality
Pool Extent = 23 meters 		16/20 (Optimal)
Riffle Quality
Riffle Extent = 59 meters 		19/20 (Optimal)
Shading 94 %
Embeddedness 15 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 15.6 ° C
Dissolved oxygen (DO) 7 mg/L
pH (lab) 6.69
Conductivity 130 µmho/cm
Alkalinity
(acid neutralizing capacity) 		43.2 µeq/L
Dissolved organic carbon (DOC) 0.5 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 2 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Fantail Darter 33
Blacknose Dace 22
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Allegheny Mountain Dusky 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
Leuctra  Rolled-Winged Stonefly 28
Paraphaenocladius Non-Biting Midges 12
Amphinemura Spring Stonefly 12
Micropsectra Non-Biting Midges 9
Sweltsa Stonefly 6
Polypedilum Non-Biting Midges 5
Ephemerella Sulphur Mayfly 4
Lumbriculidae Worm 3
Tvetenia Non-Biting Midges 3
Potamyia 3
Ceratopogon Biting Midge 2
Stempellinella Non-Biting Midges 2
Rhyacophila Free-Living Caddisfly 2
Hydropsyche Net-Spinning Caddisfly 2
Parachaetocladius Non-Biting Midge 2
Brillia Non-Biting Midges 1
Eukiefferiella Non-Biting Midges 1
Dicranota Hairy-Eyed Cranefly 1
Dolophilodes Medium Evening Sedge Caddisfly 1
Prosimulium Black Fly 1
Hexatoma Crane Fly 1
Tipula Crane Fly 1
Peltoperla 1
Enchytraeidae Aquatic Worm 1
Bezzia Biting Midge 1
Oulimnius Riffle Beetle 1
Polycentropus Tube Maker 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.