MBSS Site Summary for: PRWA-104-R-2000

Site Photos

Field photo showing stream conditions at site PRWA-104-R-2000-01 (Opens in a new window) Field photo showing stream conditions at site PRWA-104-R-2000-02 (Opens in a new window)

Located on GREEN SPRING RUN UT1 in the Potomac River WA Cnty watershed, 8-digit code: 02140501.
This stream was visited in the spring on 3/30/2000 and again in the summer on 8/9/2000.

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 - 1.3 / 5.0
Benthic IBI Poor - 2.5 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 623 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 2.3 %
Agricultural Land Use 7.1 %
Forested Land Use 90.6 %


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 10/20 (Marginal)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = 60 meters 		9/20 (Marginal)
Riffle Quality
Riffle Extent = 25 meters 		7/20 (Marginal)
Shading 95 %
Embeddedness 30 %


Stream Water Quality:
Water temperature 21.1 ° C
Dissolved oxygen (DO) 7.4 mg/L
pH (lab) 7.44
Conductivity 190 µmho/cm
Alkalinity
(acid neutralizing capacity) 		724.1 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 2 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 69
Creek Chub 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
Canada Thistle
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Amphinemura Spring Stonefly 94
Perlodidae Perlodid Stonefly 10
Ephemerella Sulphur Mayfly 8
Ameletus Combmouthed Minnow Mayfly 5
Parametriocnemus Non-Biting Midges 2
Tanytarsus Non-Biting Midges 2
Thienemanniella Non-Biting Midges 1
Leuctridae Rolledwinged Stonefly 1
Chloroperlidae Green Stonefly 1
Conchapelopia Non-Biting Midges 1
Prosimulium Black Fly 1
Stegopterna Black Fly 1
Diamesa Bloodworm 1
Prostoia Spring 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.