MBSS Site Summary for: PRLN-318-R-2003

Site Photos

Field photo showing stream conditions at site PRLN-318-R-2003-1 (Opens in a new window) Field photo showing stream conditions at site PRLN-318-R-2003-3 (Opens in a new window) Field photo showing stream conditions at site PRLN-318-R-2003-2 (Opens in a new window) Field photo showing stream conditions at site PRLN-318-R-2003-4 (Opens in a new window)

Located on COLLIER RUN in the Potomac River L N Branch watershed, 8-digit code: 02141001.
This stream was visited in the spring on 3/31/2003 and again in the summer on 8/20/2003.

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 Good - 4.5 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 4,615 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 3 %
Agricultural Land Use 11 %
Forested Land Use 86 %


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

Physical Stream Habitat
Instream Habitat 16/20 (Optimal)
Epifaunal Substrate 17/20 (Optimal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = 50 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 41 meters 		13/20 (Suboptimal)
Shading 94 %
Embeddedness 20 %


Stream Water Quality:
Water temperature 18.4 ° C
Dissolved oxygen (DO) 8.7 mg/L
pH (lab) 7.23
Conductivity 157 µmho/cm
Alkalinity
(acid neutralizing capacity) 		229.9 µeq/L
Dissolved organic carbon (DOC) 1.9 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 7 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 271
Creek Chub 62
Potomac Sculpin 37
Fantail Darter 21
White Sucker 9
Central Stoneroller 5
Green Sunfish 3
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Mile-A-Minute
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Amphinemura Spring Stonefly 26
Ephemerellidae Spiny Crawler Mayfly 11
Tanytarsini Non-Biting Midges 9
Optioservus Riffle Beetle 9
Paraleptophlebia Blue Quill Mayfly 7
Prosimulium Black Fly 5
Acroneuria Golden Stoneflies 5
Chimarra Fingernet Caddisfly 4
Hexatoma Crane Fly 4
Leuctridae Rolledwinged Stonefly 4
Perlodidae Perlodid Stonefly 2
Oemopteryx Stonefly 2
Pseudolimnophila Crane Fly 2
Neophylax Caddisfly 2
Diplectrona Net-Spinning Caddisfly 2
Orthocladius Non-Biting Midges 2
Parametriocnemus Non-Biting Midges 1
Heptageniidae Flathead Mayfly 1
Stenonema Flatheaded Mayfly 1
Epeorus Mayfly 1
Eurylophella Mayfly 1
Dolophilodes Medium Evening Sedge Caddisfly 1
Nigronia Megaloptera (Dark Fishfly) 1
Cheumatopsyche Net-Spinning Caddisfly 1
Gomphidae Clubtail Dragonfly 1
Ameletus Combmouthed Minnow Mayfly 1
Antocha Crane Fly 1
Tipula Crane Fly 1
Stenelmis Beetle 1
Psephenus Water Penny 1
Ectopria Water Penny Beetle 1
Baetidae Small Minnow Mayfly 1
Boyeria Spotted Darner Dragonfly 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.