MBSS Site Summary for: COCA-204-N-2003

Site Photos

Field photo showing stream conditions at site COCA-204-N-2003-1 (Opens in a new window) Field photo showing stream conditions at site COCA-204-N-2003-3 (Opens in a new window) Field photo showing stream conditions at site COCA-204-N-2003-2 (Opens in a new window)

Located on MARSH RUN in the Marsh Run watershed, 8-digit code: 02140503.
This stream was visited in the spring on 4/16/2003 and again in the summer on 7/26/2003.

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 - 2.3 / 5.0
Benthic IBI Poor - 1.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 13,456 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 17 %
Agricultural Land Use 69 %
Forested Land Use 14 %


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

Physical Stream Habitat
Instream Habitat 13/20 (Suboptimal)
Epifaunal Substrate 6/20 (Marginal)
Velocity/Depth Diversity 18/20 (Optimal)
Pool Quality
Pool Extent = 28 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 75 meters 		20/20 (Optimal)
Shading 95 %
Embeddedness 50 %


Stream Water Quality:
Water temperature 18.6 ° C
Dissolved oxygen (DO) 8.1 mg/L
pH (lab) 7.98
Conductivity 618 µmho/cm
Alkalinity
(acid neutralizing capacity) 		5054 µeq/L
Dissolved organic carbon (DOC) 1.4 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 4 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Spotfin Shiner 10
Fallfish 6
Smallmouth Bass 4
Golden Redhorse 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladius Non-Biting Midges 69
Orthocladiinae Midge 20
Lumbriculidae Worm 7
Diamesa Bloodworm 4
Chaetocladius Non-Biting Midges 3
Tanytarsus Non-Biting Midges 3
Crangonyx Amphipod 2
Lepidoptera Aquatic Moth 1
Stenelmis Beetle 1
Tipulidae Cranefly 1
Chrysops Deerfly 1
Caecidotea Isopod 1
Thienemanniella Non-Biting Midges 1
Thienemannimyia group Non-Biting Midges 1
Polypedilum 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.