MBSS Site Summary for: PRET-303-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 Fair - 3.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 8,490 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 5 %
Agricultural Land Use 75 %
Forested Land Use 21 %


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 15/20 (Suboptimal)
Velocity/Depth Diversity 15/20 (Suboptimal)
Pool Quality
Pool Extent = 58 meters 		16/20 (Optimal)
Riffle Quality
Riffle Extent = 24 meters 		17/20 (Optimal)
Shading 40 %
Embeddedness 40 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 18.8 ° C
Dissolved oxygen (DO) 9.2 mg/L
Conductivity 223 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:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

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

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Hydropsyche Net-Spinning Caddisfly 17
Orthocladius Non-Biting Midges 17
Cheumatopsyche Net-Spinning Caddisfly 13
Tvetenia Non-Biting Midges 10
Thienemanniella Non-Biting Midges 5
Hydrobaenus Midge 5
Parametriocnemus Non-Biting Midges 4
Chimarra Fingernet Caddisfly 3
Sympotthastia Non-Biting Midges 3
Amphinemura Spring Stonefly 3
Tanypodinae Non-Biting Midges 2
Rheosmittia Non-Biting Midges 2
Orthocladiinae Midge 2
Prosimulium Black Fly 2
Simulium Black Fly 2
Antocha Crane Fly 2
Strophopteryx Early Brown Stonefly 1
Chelifera Aquatic Dance Fly 1
Enchytraeidae Aquatic Worm 1
Stegopterna Black Fly 1
Neophylax Caddisfly 1
Ameletus Combmouthed Minnow Mayfly 1
Hydropsychidae Common Netspinner Caddisfly 1
Stilocladius Midge 1
Polypedilum Non-Biting Midges 1
Diamesinae Non-Biting Midges 1
Glossosomatidae Saddlecase Maker Caddisfly 1
Isonychia Slate Drake Mayfly 1
Ephemerellidae Spiny Crawler Mayfly 1
Hemerodromia Tiny Fly 1
Tropisternus Water Scavenger Beetle 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.