MBSS Site Summary for: PRUN-104-R-2001

Site Photos

Field photo showing stream conditions at site PRUN-104-R-2001-1 (Opens in a new window) Field photo showing stream conditions at site PRUN-104-R-2001-2 (Opens in a new window)

Located on NORTH PRONG LOSTLAND RUN in the Potomac River U N Branch watershed, 8-digit code: 02141005.
This stream was visited in the spring on 4/2/2001 and again in the summer on 8/15/2001.

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 Poor - 1.0 / 5.0
Benthic IBI Poor - 2.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 1,608 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 5 %
Forested Land Use 93 %


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

Physical Stream Habitat
Instream Habitat 19/20 (Optimal)
Epifaunal Substrate 18/20 (Optimal)
Velocity/Depth Diversity 15/20 (Suboptimal)
Pool Quality
Pool Extent = 26 meters 		17/20 (Optimal)
Riffle Quality
Riffle Extent = 55 meters 		17/20 (Optimal)
Shading 98 %
Embeddedness 25 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 14.5 ° C
Dissolved oxygen (DO) 9.1 mg/L
pH (lab) 4.73
Conductivity 40 µmho/cm
Alkalinity
(acid neutralizing capacity) 		-23.9 µeq/L
Dissolved organic carbon (DOC) 1.1 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:
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
Leuctra  Rolled-Winged Stonefly 53
Amphinemura Spring Stonefly 22
Prosimulium Black Fly 17
Rhyacophila Free-Living Caddisfly 11
Neophylax Caddisfly 3
Tanytarsus Non-Biting Midges 2
Thienemanniella Non-Biting Midges 1
Thienemannimyia group Non-Biting Midges 1
Nemouridae Nemourid Stonefly 1
Eukiefferiella Non-Biting Midges 1
Heleniella European Non-Biting Midge 1
Chelifera Aquatic Dance Fly 1
Probezzia Biting Midges 1
Oemopteryx Stonefly 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.