MBSS Site Summary for: MO-P-153-113-97


Located on ROCK CR UT1 in the Rock Creek watershed, 8-digit code: 02140206.
This stream was visited in the spring on 3/20/1997 and again in the summer on 7/16/1997.

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 - 4.7 / 5.0
Benthic IBI Poor - 2.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 575 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 59.1 %
Forested Land Use 30.3 %


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 15/20 (Suboptimal)
Velocity/Depth Diversity 9/20 (Marginal)
Pool Quality
Pool Extent = meters 		8/20 (Marginal)
Riffle Quality 7/20 (Marginal)
Shading 95 %
Embeddedness 20 %


Stream Water Quality:
Water temperature 18 ° C
Dissolved oxygen (DO) 6.8 mg/L
pH (lab) 6.92
Conductivity 109 µmho/cm
Alkalinity
(acid neutralizing capacity) 		395 µeq/L
Dissolved organic carbon (DOC) 2.5 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 9 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Potomac Sculpin 70
Blacknose Dace 53
Rosyside Dace 27
Creek Chub 7
Longnose Dace 3
Largemouth Bass 2
Common Shiner 1
Green Sunfish 1
White Sucker 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Dusky Salamander

Crayfish:
Orconectes virilis

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cricotopus/Orthocladius Midge 22
Orthocladiinae A Non-Biting Midges 13
Oulimnius Riffle Beetle 9
Polypedilum Non-Biting Midges 8
Prosimulium Black Fly 8
Naididae Aquatic Worm 8
Parametriocnemus Non-Biting Midges 7
Diamesa Bloodworm 4
Antocha Crane Fly 4
Clinocera Aquatic Dance Fly 3
Eukiefferiella Non-Biting Midges 3
Rheotanytarsus Non-Biting Midges 2
Tanytarsus Non-Biting Midges 2
Tubificidae Aquatic Worm 2
Chelifera Aquatic Dance Fly 1
Tipula Crane Fly 1
Dicranota Hairy-Eyed Cranefly 1
Simulium Black Fly 1
Orthocladius Non-Biting Midges 1
Cheumatopsyche Net-Spinning Caddisfly 1
Hydropsyche Net-Spinning Caddisfly 1
Conchapelopia Non-Biting Midges 1
Optioservus Riffle Beetle 1
Ephemerella Sulphur Mayfly 1
Rheocricotopus 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.