MBSS Site Summary for: COCA-209-N-2003

Site Photos

Field photo showing stream conditions at site COCA-209-N-2003-831 (Opens in a new window) Field photo showing stream conditions at site COCA-209-N-2003-832 (Opens in a new window)

Located on ROCK RUN in the Potomac River MO Cnty watershed, 8-digit code: 02140202.
This stream was visited in the spring on 4/15/2003 and again in the summer on 8/6/2003.

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 Poor - 2.7 / 5.0
Benthic IBI Poor - 1.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 3,090 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 30 %
Agricultural Land Use 44 %
Forested Land Use 25 %


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 12/20 (Suboptimal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = 36 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 65 meters 		11/20 (Suboptimal)
Shading 90 %
Embeddedness 40 %


Stream Water Quality:
Water temperature 20.5 ° C
Dissolved oxygen (DO) 8.2 mg/L
pH (lab) 9.64
Conductivity 211 µmho/cm
Alkalinity
(acid neutralizing capacity) 		858.9 µeq/L
Dissolved organic carbon (DOC) 2.8 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 95
Longnose Dace 34
Fantail Darter 17
Cutlip Minnow 15
Green Sunfish 4
White Sucker 2
Redbreast Sunfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Diamesinae Non-Biting Midges 110
Stenelmis Beetle 5
Chimarra Fingernet Caddisfly 2
Polypedilum Non-Biting Midges 2
Crangonyx Amphipod 2
Tanytarsus Non-Biting Midges 1
Lumbriculidae Worm 1
Orthocladius Non-Biting Midges 1
Stenonema Flatheaded Mayfly 1
Caecidotea Isopod 1
Cheumatopsyche Net-Spinning 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.