MBSS Site Summary for: PRMT-177-S-2013

Site Photos

Field photo showing stream conditions at site PRMT-177-S-2013-MidpointDownstream (Opens in a new window) Field photo showing stream conditions at site PRMT-177-S-2013-MidpointUpstream (Opens in a new window)

Located on REEDER RUN in the Potomac River M tidal watershed, 8-digit code: 02140102.
This stream was visited in the spring on 3/19/2013 and again in the summer on 6/6/2013.

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 - 4.7 / 5.0
Benthic IBI Good - 4.7 / 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 12.9 %
Agricultural Land Use 3.5 %
Forested Land Use 82.7 %


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

Physical Stream Habitat

Instream Habitat 18/20 (Optimal)
Epifaunal Substrate 17/20 (Optimal)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = 51 meters
17/20 (Optimal)
Riffle Quality
Riffle Extent = 30 meters
11/20 (Suboptimal)
Shading 50 %
Embeddedness 40 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:

pH (lab) 6.07
Alkalinity
(acid neutralizing capacity)
71.1 µeq/L
Dissolved organic carbon (DOC) 5.6424 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 13 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Redbreast Sunfish 96
Eastern Mudminnow 17
Least Brook Lamprey 17
Creek Chubsucker 15
American Eel 8
Golden Shiner 8
Blacknose Dace 6
Tessellated Darter 4
Lepomis Hybrid 3
Creek Chub 2
Pumpkinseed 2
Chain Pickerel 1
Rosyside Dace 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:

Eastern Cricket Frog
Eastern Wormsnake
Gray Treefrog
Pickerel Frog
Stinkpot

Crayfish:

Orconectes limosus
Procambarus clarkii

Exotic Plants:

Japanese Honeysuckle
Japanese Stiltgrass
 

Benthic Macroinvertebrates:

Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Stegopterna Black Fly 33
Cheumatopsyche Net-Spinning Caddisfly 15
Acerpenna Tiny Blue-Winged Olive Mayflies 9
Hydropsyche Net-Spinning Caddisfly 9
Bezzia Biting Midge 5
Parametriocnemus Non-Biting Midges 5
Polypedilum Non-Biting Midges 3
Stempellinella Non-Biting Midges 3
Prosimulium Black Fly 3
Simulium Black Fly 3
Maccaffertium March Brown And Cahill Mayfly 3
Nigronia Megaloptera (Dark Fishfly) 3
Diplectrona Net-Spinning Caddisfly 3
Ceratopogon Biting Midge 2
Psilotreta Mortarjoint Casemaker Caddisfly 1
Chrysops Deerfly 1
Chimarra Fingernet Caddisfly 1
Tanypodinae Non-Biting Midges 1
Tanytarsus Non-Biting Midges 1
Thienemannimyia Group Non-Biting Midges 1
Tribelos Non-Biting Midges 1
Trissopelopia Non-Biting Midges 1
Isoperla Stripetail Stonefly 1
Cricotopus Non-Biting Midges 1
Micropsectra Non-Biting Midges 1
Microtendipes Non-Biting Midges 1
Orthocladius Non-Biting Midges 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.