MBSS Site Summary for: MO-P-496-215-97


Located on BROAD RUN in the Potomac River MO Cnty watershed, 8-digit code: 02140202.
This stream was visited in the spring on 3/25/1997 and again in the summer on 6/17/1997.

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 - 3.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
(Hint: Screen readers will announce definitions; mouse users can hover over dotted text.)
Catchment area 807 acres Cows standing in a stream at a site with high agricultural land use. Cows survey the sampling procedure at this extreme example of a highly agriculturalized site.
Urban Land Use 1.2 %
Agricultural Land Use 69.2 %
Forested Land Use 28.9 %


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 5/20 (Poor)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = meters 		12/20 (Suboptimal)
Riffle Quality 6/20 (Marginal)
Shading 95 %
Embeddedness 25 %


Stream Water Quality:
Water temperature 20 ° C
Dissolved oxygen (DO) 9.8 mg/L
pH (lab) 6.76
Conductivity 80 µmho/cm
Alkalinity
(acid neutralizing capacity) 		199 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 5 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 125
Creek Chub 78
Rosyside Dace 13
Potomac Sculpin 10
Green Sunfish 2
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Ratsnake
Northern Two-Lined Salamander
Wood Frog

Crayfish:
Cambarus bartonii bartonii
Orconectes virilis

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Amphinemura Spring Stonefly 33
Prosimulium Black Fly 8
Diplectrona Net-Spinning Caddisfly 7
Stenonema Flatheaded Mayfly 6
Eukiefferiella Non-Biting Midges 5
Perlodidae Perlodid Stonefly 5
Oulimnius Riffle Beetle 5
Tanytarsus Non-Biting Midges 4
Cheumatopsyche Net-Spinning Caddisfly 4
Cricotopus/Orthocladius Midge 3
Parametriocnemus Non-Biting Midges 3
Polypedilum Non-Biting Midges 3
Rheotanytarsus Non-Biting Midges 3
Acerpenna Tiny Blue-Winged Olive Mayflies 2
Eccoptura Yellow Stone Stonefly 2
Trissopelopia Non-Biting Midges 2
Unniella Non-Biting Midge 2
Antocha Crane Fly 2
Chrysops Deerfly 1
Chimarra Fingernet Caddisfly 1
Perlidae Common Stonefly 1
Heptagenia 1
Crangonyx Amphipod 1
Tubificidae Aquatic Worm 1
Helichus Beetle 1
Stenelmis Beetle 1
Ceratopogon Biting Midge 1
Conchapelopia Non-Biting Midges 1
Hydropsyche Net-Spinning Caddisfly 1
Clioperla Green-Winged Stonefly 1
Collembola Springtail 1
Thienemanniella 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.