MBSS Site Summary for: WA-V-077-310-95


Located on MARSH RUN in the Marsh Run watershed, 8-digit code: 02140503.
This stream was visited in the spring on 3/6/1995 and again in the summer on 7/13/1995.

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 - 3.7 / 5.0
Benthic IBI Poor - 2.8 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 11,572 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 16.9 %
Agricultural Land Use 69.5 %
Forested Land Use 13.2 %


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

Physical Stream Habitat
Instream Habitat 17/20 (Optimal)
Epifaunal Substrate 11/20 (Suboptimal)
Velocity/Depth Diversity 16/20 (Optimal)
Pool Quality
Pool Extent = meters 		19/20 (Optimal)
Riffle Quality 16/20 (Optimal)
Shading 80 %
Embeddedness 0 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 18 ° C
Dissolved oxygen (DO) 7.7 mg/L
pH (lab) 7.95
Conductivity 550 µmho/cm
Alkalinity
(acid neutralizing capacity) 		5334 µeq/L
Dissolved organic carbon (DOC) 2 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 10 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 34
Fantail Darter 16
Greenside Darter 12
Longnose Dace 8
White Sucker 8
Largemouth Bass 7
Bluegill 5
Rainbow Trout 3
Redbreast Sunfish 1
River Chub 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ephemerella Sulphur Mayfly 42
Acerpenna Tiny Blue-Winged Olive Mayflies 31
Hydropsyche Net-Spinning Caddisfly 21
Crangonyx Amphipod 8
Cheumatopsyche Net-Spinning Caddisfly 6
Antocha Crane Fly 5
Simulium Black Fly 3
Pagastia 2
Eukiefferiella Non-Biting Midges 2
Paratanytarsus Non-Biting Midges 1
Tvetenia Non-Biting Midges 1
Optioservus Riffle Beetle 1
Pycnopsyche Great Autumn Brown Sedge Caddisfly 1
Neophylax Caddisfly 1
Chelifera Aquatic Dance Fly 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.