MBSS Site Summary for: PRET-205-X-2005


Located on Murphy Run in the Prettyboy Reservoir watershed, 8-digit code: 02130806.
This stream was visited in the spring on 7/25/2005 and again in the summer on 7/25/2005.

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 Good - 4.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
(Hint: Screen readers will announce definitions; mouse users can hover over dotted text.)
Catchment area 2,795 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 8 %
Agricultural Land Use 72 %
Forested Land Use 20 %


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

Physical Stream Habitat
Instream Habitat 15/20 (Suboptimal)
Epifaunal Substrate 13/20 (Suboptimal)
Velocity/Depth Diversity 14/20 (Suboptimal)
Pool Quality
Pool Extent = 50 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 45 meters 		15/20 (Suboptimal)
Shading 87 %
Embeddedness 35 %


Stream Water Quality:
Water temperature 21.5 ° C
Dissolved oxygen (DO) 8.1 mg/L
Conductivity 231 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 Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Dolophilodes Medium Evening Sedge Caddisfly 45
Polypedilum Non-Biting Midges 12
Hydropsyche Net-Spinning Caddisfly 7
Leuctridae Rolledwinged Stonefly 7
Cheumatopsyche Net-Spinning Caddisfly 6
Amphinemura Spring Stonefly 6
Orthocladius Non-Biting Midges 5
Ephemerella Sulphur Mayfly 4
Acentrella Tiny Blue-Winged Olive Mayflies 4
Leptophlebiidae Pronggilled Mayfly 3
Antocha Crane Fly 3
Simulium Black Fly 2
Diamesa Bloodworm 1
Paraleptophlebia Blue Quill Mayfly 1
Stenonema Flatheaded Mayfly 1
Rhyacophila Free-Living Caddisfly 1
Stenelmis Beetle 1
Orthocladiinae Midge 1
Baetidae Small Minnow Mayfly 1
Brillia Non-Biting Midges 1
Cricotopus Non-Biting Midges 1
Tanypodinae Non-Biting Midges 1
Thienemannimyia group 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.