MBSS Site Summary for: PRMT-177-S-2015


Located on REEDER RUN in the Potomac River M tidal watershed, 8-digit code: 02140102.
This stream was visited in the spring on 3/11/2015 and again in the summer on 6/18/2015.

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 Good - 5.0 / 5.0
Benthic IBI Good - 5.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 272 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 13.7 %
Agricultural Land Use 2.9 %
Forested Land Use 75.9 %


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 15/20 (Suboptimal)
Velocity/Depth Diversity 13/20 (Suboptimal)
Pool Quality
Pool Extent = 50 meters 		12/20 (Suboptimal)
Riffle Quality
Riffle Extent = 26 meters 		9/20 (Marginal)
Shading 35 %
Embeddedness 75 %
The embeddedness, a measure of silt on the stream bottom, was 75%. This is relatively high, and may exclude some biota.


Stream Water Quality:
pH (lab) 6.08
Alkalinity
(acid neutralizing capacity) 		69.8 µeq/L
Dissolved organic carbon (DOC) 5.717 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 11 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Redbreast Sunfish 90
Blacknose Dace 52
Least Brook Lamprey 49
Rosyside Dace 34
Creek Chub 27
Creek Chubsucker 25
Eastern Mudminnow 21
Tessellated Darter 16
American Eel 15
Lepomis Hybrid 1
Margined Madtom 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Common Five-Lined Skink
Cope's Gray Treefrog
Eastern Box Turtle
Northern Green Frog
Southern Leopard Frog

Crayfish:
Cambaridae
Orconectes limosus
Procambarus clarkii

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Acerpenna Tiny Blue-Winged Olive Mayflies 18
Chimarra Fingernet Caddisfly 11
Leuctridae Rolledwinged Stonefly 10
Hydropsyche Net-Spinning Caddisfly 10
Cheumatopsyche Net-Spinning Caddisfly 7
Anchytarsus Beetle 7
Tanytarsus Non-Biting Midges 6
Nigronia Megaloptera (Dark Fishfly) 5
Pseudolimnophila Crane Fly 4
Parametriocnemus Non-Biting Midges 4
Rheotanytarsus Non-Biting Midges 3
Orthocladius Non-Biting Midges 3
Simulium Black Fly 3
Leuctra  Rolled-Winged Stonefly 3
Diplectrona Net-Spinning Caddisfly 3
Maccaffertium March Brown And Cahill Mayfly 3
Eurylophella Mayfly 2
Ceratopogonidae Biting Midge 2
Thienemanniella Non-Biting Midges 2
Eukiefferiella Non-Biting Midges 2
Microtendipes Non-Biting Midges 1
Nanocladius Non-Biting Midges 1
Stictochironomus Non-Biting Midge 1
Corynoneura Non-Biting Midges 1
Tanypodinae Non-Biting Midges 1
Polypedilum Non-Biting Midges 1
Rheocricotopus Non-Biting Midges 1
Thienemannimyia Group Non-Biting Midges 1
Tvetenia Non-Biting Midges 1
Leptophlebia Pronggilled Mayfly 1
Leptophlebiidae Pronggilled Mayfly 1
Synurella Amphipod 1
Gomphidae Clubtail Dragonfly 1
Endochironomus 1
Heptageniidae Flathead Mayfly 1
Pycnopsyche Great Autumn Brown Sedge Caddisfly 1
Psilotreta Mortarjoint Casemaker 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.