MBSS Site Summary for: BA-P-418-207-96


Located on PRETTYBOY BR in the Prettyboy Reservoir watershed, 8-digit code: 02130806.
This stream was visited in the spring on 4/8/1996 and again in the summer on 6/12/1996.

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 - 2.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 904 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 0 %
Agricultural Land Use 91.9 %
Forested Land Use 7.2 %


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

Physical Stream Habitat
Instream Habitat 10/20 (Marginal)
Epifaunal Substrate 9/20 (Marginal)
Velocity/Depth Diversity 8/20 (Marginal)
Pool Quality
Pool Extent = meters 		7/20 (Marginal)
Riffle Quality 12/20 (Suboptimal)
Shading 30 %
Embeddedness 70 %
The embeddedness, a measure of silt on the stream bottom, was 70%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 19.2 ° C
Dissolved oxygen (DO) 9.8 mg/L
pH (lab) 7.17
Conductivity 186 µmho/cm
Alkalinity
(acid neutralizing capacity) 		351.7 µeq/L
Dissolved organic carbon (DOC) 1.7 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 172
Creek Chub 140
Bluegill 35
Central Stoneroller 35
Longnose Dace 19
Rosyside Dace 11
Yellow Bullhead 10
White Sucker 7
Bluntnose Minnow 6
Tessellated Darter 2
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Dusky Salamander
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
Stenelmis Beetle 16
Cricotopus/Orthocladius Midge 14
Parametriocnemus Non-Biting Midges 12
Cheumatopsyche Net-Spinning Caddisfly 11
Hydropsyche Net-Spinning Caddisfly 7
Stenonema Flatheaded Mayfly 7
Optioservus Riffle Beetle 5
Conchapelopia Non-Biting Midges 4
Simulium Black Fly 4
Tanytarsus Non-Biting Midges 3
Orthocladiinae A Non-Biting Midges 3
Polypedilum Non-Biting Midges 2
Antocha Crane Fly 2
Microtendipes Non-Biting Midges 2
Clinocera Aquatic Dance Fly 1
Baetis Blue-Winged Olive Mayfly 1
Dubiraphia Riffle Beetle 1
Ephemerella Sulphur Mayfly 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.