MBSS Site Summary for: PRLN-201-R-2003

Site Photos

Field photo showing stream conditions at site PRLN-201-R-2003-1 (Opens in a new window) Field photo showing stream conditions at site PRLN-201-R-2003-3 (Opens in a new window) Field photo showing stream conditions at site PRLN-201-R-2003-2 (Opens in a new window) Field photo showing stream conditions at site PRLN-201-R-2003-4 (Opens in a new window)

Located on SEVEN SPRINGS RUN UT2 in the Potomac River L N Branch watershed, 8-digit code: 02141001.
This stream was visited in the spring on 3/25/2003 and again in the summer on 6/26/2003.

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 Fair - 3.3 / 5.0
Benthic IBI Fair - 3.8 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 1,151 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 4 %
Agricultural Land Use 3 %
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 11/20 (Suboptimal)
Epifaunal Substrate 11/20 (Suboptimal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = 51 meters 		12/20 (Suboptimal)
Riffle Quality
Riffle Extent = 25 meters 		11/20 (Suboptimal)
Shading 85 %
Embeddedness 35 %


Stream Water Quality:
Water temperature 16.1 ° C
Dissolved oxygen (DO) 8.1 mg/L
pH (lab) 6.69
Conductivity 72 µmho/cm
Alkalinity
(acid neutralizing capacity) 		163.5 µeq/L
Dissolved organic carbon (DOC) 1.5 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 8 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 82
Creek Chub 58
Fantail Darter 23
Rainbow Darter 6
Central Stoneroller 5
Green Sunfish 4
White Sucker 3
Pumpkinseed 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Perlodidae Perlodid Stonefly 29
Ephemerella Sulphur Mayfly 26
Amphinemura Spring Stonefly 12
Parametriocnemus Non-Biting Midges 9
Micropsectra Non-Biting Midges 8
Leuctridae Rolledwinged Stonefly 8
Crangonyx Amphipod 5
Lumbriculidae Worm 5
Eurylophella Mayfly 4
Prosimulium Black Fly 3
Neophylax Caddisfly 2
Nemouridae Nemourid Stonefly 2
Polypedilum Non-Biting Midges 1
Tanypodinae Non-Biting Midges 1
Elmidae Riffle Beetle 1
Gomphidae Clubtail Dragonfly 1
Ameletus Combmouthed Minnow Mayfly 1
Tipula Crane Fly 1
Heptageniidae Flathead Mayfly 1
Rhyacophila Free-Living Caddisfly 1
Clioperla Green-Winged Stonefly 1
Lepidostoma Little Brown Sedge Caddisfly 1
Sweltsa 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.