MBSS Site Summary for: PRET-209-X-2005


Located on Grave Run in the Prettyboy Reservoir watershed, 8-digit code: 02130806.
This stream was visited in the spring on 8/1/2005 and again in the summer on 8/1/2005.

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 - 3.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 4,867 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 63 %
Forested Land Use 35 %


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 16/20 (Optimal)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = 39 meters 		13/20 (Suboptimal)
Riffle Quality
Riffle Extent = 67 meters 		16/20 (Optimal)
Shading 88 %
Embeddedness 30 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 20.1 ° C
Dissolved oxygen (DO) 9.1 mg/L
Conductivity 151 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
Siphlonurus Gray Drake Mayfly 22
Hydrobaenus Midge 9
Phaenopsectra Non-Biting Midges 8
Orthocladiinae Midge 7
Eurylophella Mayfly 6
Musculium Fingernail Clam 3
Tanytarsus Non-Biting Midges 3
Leptophlebiidae Pronggilled Mayfly 3
Ephemerella Sulphur Mayfly 3
Ceratopogonidae Biting Midge 2
Prosimulium Black Fly 2
Orthocladius Non-Biting Midges 2
Chironomini Non-Biting Midge 2
Paracladopelma Non-Biting Midge 1
Cricotopus Non-Biting Midges 1
Microtendipes Non-Biting Midges 1
Pycnopsyche Great Autumn Brown Sedge Caddisfly 1
Chloroperlidae Green Stonefly 1
Neophylax Caddisfly 1
Tipula Crane Fly 1
Rhyacophila Free-Living Caddisfly 1
Physa Air-Breathing Freshwater Snail 1
Tubificidae Aquatic Worm 1
Hydroporus Water Beetle 1
Corixidae Water Boatman 1
Optioservus Riffle Beetle 1
Oulimnius Riffle Beetle 1
Trissopelopia Non-Biting Midges 1
Zavrelimyia 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.