MBSS Site Summary for: LYOU-112-R-2004


Located on LITTLE YOUGHIOGHENY R UT 1 in the Little Youghiogheny R watershed, 8-digit code: 05020202.
This stream was visited in the spring on 4/6/2004 and again in the summer on 7/14/2004.

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 - 1.0 / 5.0
Benthic IBI Fair - 3.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 404 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 7 %
Agricultural Land Use 9 %
Forested Land Use 84 %


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 11/20 (Suboptimal)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = 60 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 15 meters 		7/20 (Marginal)
Shading 65 %
Embeddedness 60 %
The embeddedness, a measure of silt on the stream bottom, was 60%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 18.5 ° C
Dissolved oxygen (DO) 6.9 mg/L
pH (lab) 6.97
Conductivity 198 µmho/cm
Alkalinity
(acid neutralizing capacity) 		274.3 µeq/L
Dissolved organic carbon (DOC) 1.3 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 2 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Creek Chub 104
Blacknose Dace 37
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Watersnake

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladius Non-Biting Midges 22
Leuctra  Rolled-Winged Stonefly 12
Ostrocerca Stonefly 10
Hyalella Amphipod 7
Prosimulium Black Fly 6
Parametriocnemus Non-Biting Midges 6
Thienemannimyia group Non-Biting Midges 5
Diplectrona Net-Spinning Caddisfly 4
Nemouridae Nemourid Stonefly 3
Ptilostomis Giant Casemaker Caddisfly 2
Stempellinella Non-Biting Midges 2
Tipulidae Cranefly 2
Tvetenia Non-Biting Midges 2
Limnephilidae Northern Casemaker Caddisfly 2
Perlodidae Perlodid Stonefly 1
Leptophlebiidae Pronggilled Mayfly 1
Ephemerella Sulphur Mayfly 1
Lumbriculidae Worm 1
Molanna 1
Empididae Dance Fly 1
Stenonema Flatheaded Mayfly 1
Anchytarsus Beetle 1
Neophylax Caddisfly 1
Ameletus Combmouthed Minnow Mayfly 1
Antocha Crane Fly 1
Tipula Crane Fly 1
Hydropsyche Net-Spinning Caddisfly 1
Eukiefferiella Non-Biting Midges 1
Pycnopsyche Great Autumn Brown Sedge Caddisfly 1
Lepidostoma Little Brown Sedge Caddisfly 1
Lype Net Tube 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.