MBSS Site Summary for: PRET-107-X-2005


Located on Georges Run in the Prettyboy Reservoir watershed, 8-digit code: 02130806.
This stream was visited in the spring on 9/19/2005 and again in the summer on 9/19/2005.

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 N R
Benthic IBI Poor - 2.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 754 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 18 %
Agricultural Land Use 67 %
Forested Land Use 15 %


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

Physical Stream Habitat
Instream Habitat 16/20 (Optimal)
Epifaunal Substrate 14/20 (Suboptimal)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = 55 meters 		13/20 (Suboptimal)
Riffle Quality
Riffle Extent = 25 meters 		15/20 (Suboptimal)
Shading 65 %
Embeddedness 40 %


Stream Water Quality:
Water temperature 19.4 ° C
Dissolved oxygen (DO) 8.8 mg/L
Conductivity 253 µmho/cm

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:
Fish data is unavailable or no fish observed.

Amphibians and Reptiles:
American Bullfrog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Stiltgrass
Mile-A-Minute
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladius Non-Biting Midges 49
Hydropsyche Net-Spinning Caddisfly 14
Diplectrona Net-Spinning Caddisfly 7
Parametriocnemus Non-Biting Midges 6
Thienemannimyia group Non-Biting Midges 5
Rheosmittia Non-Biting Midges 4
Cheumatopsyche Net-Spinning Caddisfly 4
Orthocladiinae Midge 3
Glossosoma Little Black Caddisfly 3
Antocha Crane Fly 3
Chimarra Fingernet Caddisfly 2
Brillia Non-Biting Midges 2
Leptophlebiidae Pronggilled Mayfly 1
Hemerodromia Tiny Fly 1
Caecidotea Isopod 1
Tipula Crane Fly 1
Triaenodes Long-Horned 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.