MBSS Site Summary for: PRLN-119-R-2003

Site Photos

Field photo showing stream conditions at site PRLN-119-R-2003-1 (Opens in a new window) Field photo showing stream conditions at site PRLN-119-R-2003-2 (Opens in a new window) Field photo showing stream conditions at site PRLN-119-R-2003-3 (Opens in a new window)

Located on POTOMAC R UT2 UT1 in the Potomac River L N Branch watershed, 8-digit code: 02141001.
This stream was visited in the spring on 3/27/2003 and again in the summer on 6/18/2003.

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 - 3.5 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 209 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 0 %
Agricultural Land Use 0 %
Forested Land Use 100 %


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

Physical Stream Habitat
Instream Habitat 14/20 (Suboptimal)
Epifaunal Substrate 13/20 (Suboptimal)
Velocity/Depth Diversity 9/20 (Marginal)
Pool Quality
Pool Extent = 20 meters 		10/20 (Marginal)
Riffle Quality
Riffle Extent = 55 meters 		15/20 (Suboptimal)
Shading 92 %
Embeddedness 25 %


Stream Water Quality:
Water temperature 14.5 ° C
Dissolved oxygen (DO) 9.6 mg/L
pH (lab) 6.8
Conductivity 60 µmho/cm
Alkalinity
(acid neutralizing capacity) 		115.5 µeq/L
Dissolved organic carbon (DOC) 0.8 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 Dusky Salamander

Crayfish:
Cambaridae

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ameletus Combmouthed Minnow Mayfly 39
Ephemerella Sulphur Mayfly 23
Perlodidae Perlodid Stonefly 13
Amphinemura Spring Stonefly 10
Paraleptophlebia Blue Quill Mayfly 6
Pseudolimnophila Crane Fly 4
Ceratopogon Biting Midge 3
Prosimulium Black Fly 2
Neophylax Caddisfly 2
Peltoperlidae Roachlike Stonefly 2
Pisidiidae Pill Clam 2
Parametriocnemus Non-Biting Midges 2
Thienemannimyia group Non-Biting Midges 1
Oulimnius Riffle Beetle 1
Leuctridae Rolledwinged Stonefly 1
Enchytraeidae Aquatic Worm 1
Heptageniidae Flathead Mayfly 1
Caecidotea Isopod 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.