MBSS Site Summary for: LYOU-415-R-2004


Located on LITTLE YOUGHIOGHENY R in the Little Youghiogheny R watershed, 8-digit code: 05020202.
This stream was visited in the spring on 4/20/2004 and again in the summer on 10/7/2004.

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 Poor - 2.3 / 5.0
Benthic IBI Poor - 2.8 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 25,077 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 14 %
Agricultural Land Use 34 %
Forested Land Use 50 %


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 8/20 (Marginal)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = 75 meters 		16/20 (Optimal)
Riffle Quality
Riffle Extent = 0 meters 		0/20 (Poor)
Shading 40 %
Embeddedness 50 %


Stream Water Quality:
Water temperature 10.9 ° C
Dissolved oxygen (DO) 7.1 mg/L
pH (lab) 7.63
Conductivity 187 µmho/cm
Alkalinity
(acid neutralizing capacity) 		308 µeq/L
Dissolved organic carbon (DOC) 1.5 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 11 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Pumpkinseed 17
Rock Bass 12
Bluegill 9
Smallmouth Bass 6
Golden Shiner 5
River Chub 5
Green Sunfish 3
Chain Pickerel 2
Redfin Pickerel 2
White Sucker 2
Largemouth Bass 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
Canada Thistle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cheumatopsyche Net-Spinning Caddisfly 24
Orthocladius Non-Biting Midges 17
Parametriocnemus Non-Biting Midges 6
Thienemannimyia group Non-Biting Midges 6
Polypedilum Non-Biting Midges 5
Ephemerella Sulphur Mayfly 4
Hydropsyche Net-Spinning Caddisfly 3
Brillia Non-Biting Midges 3
Tanytarsus Non-Biting Midges 2
Diplectrona Net-Spinning Caddisfly 2
Stenonema Flatheaded Mayfly 2
Leuctra  Rolled-Winged Stonefly 2
Crangonyx Amphipod 2
Hyalella Amphipod 1
Diamesa Bloodworm 1
Baetis Blue-Winged Olive Mayfly 1
Antocha Crane Fly 1
Stenochironomus European Non-Biting Midge 1
Dicranota Hairy-Eyed Cranefly 1
Eurylophella Mayfly 1
Rheocricotopus Non-Biting Midges 1
Rheosmittia Non-Biting Midges 1
Stempellinella Non-Biting Midges 1
Tvetenia Non-Biting Midges 1
Perlodidae Perlodid Stonefly 1
Tallaperla Roach-Like Stonefly 1
Eukiefferiella Non-Biting Midges 1
Psychomyia Trumpet-Net Caddisfly 1
Lumbriculidae Worm 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.