MBSS Site Summary for: MO-P-110-223-97


Located on NORTHWEST BR in the Anacostia River watershed, 8-digit code: 02140205.
This stream was visited in the spring on 3/6/1997 and again in the summer on 6/26/1997.

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 Good - 4.0 / 5.0
Benthic IBI Poor - 1.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 3,591 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 3.2 %
Agricultural Land Use 52.4 %
Forested Land Use 44 %


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 5/20 (Poor)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = meters 		10/20 (Marginal)
Riffle Quality 15/20 (Suboptimal)
Shading 50 %
Embeddedness 45 %


Stream Water Quality:
Water temperature 22 ° C
Dissolved oxygen (DO) 7.6 mg/L
pH (lab) 7.26
Conductivity 150 µmho/cm
Alkalinity
(acid neutralizing capacity) 		630.5 µeq/L
Dissolved organic carbon (DOC) 3.5 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 18 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Bluntnose Minnow 671
Swallowtail Shiner 105
Fantail Darter 73
Blacknose Dace 67
Rosyside Dace 62
Common Shiner 61
Tessellated Darter 49
White Sucker 33
Redbreast Sunfish 32
Northern Hogsucker 25
Spottail Shiner 17
Creek Chub 16
Silverjaw Minnow 12
Cutlip Minnow 9
Longnose Dace 9
Margined Madtom 6
Satinfin Shiner 6
American Eel 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Eastern American Toad
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladiinae A Non-Biting Midges 39
Cricotopus/Orthocladius Midge 21
Ephemerella Sulphur Mayfly 19
Thienemanniella Non-Biting Midges 6
Naididae Aquatic Worm 4
Prosimulium Black Fly 3
Eukiefferiella Non-Biting Midges 3
Amphinemura Spring Stonefly 2
Simulium Black Fly 2
Diamesa Bloodworm 2
Corynoneura Non-Biting Midges 2
Chelifera Aquatic Dance Fly 2
Clinocera Aquatic Dance Fly 2
Nematomorpha Horsehair Worm 1
Prostoia Spring Stonefly 1
Parametriocnemus Non-Biting Midges 1
Paratanytarsus Non-Biting Midges 1
Polypedilum Non-Biting Midges 1
Sympotthastia 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.