MBSS Site Summary for: LYOU-237-A-2007
Located on Little Youghiogheny River in the Little Youghiogheny R watershed,
8-digit code: 05020202.
This stream was visited in the spring on 4/23/2007 and again in the summer on 6/26/2007.
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.
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Fish IBI
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Poor - 2.5 / 5.0
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Benthic IBI
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Fair - 3.5 / 5.0
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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.)
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Catchment area
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5,326 acres
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An example of a forested stream.
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Urban Land Use
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9 %
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Agricultural Land Use
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18.9 %
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Forested Land Use
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71 %
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Stream Water Quality:
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| Water temperature |
19.9 ° C
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| Dissolved oxygen (DO) |
6.9 mg/L
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| pH (lab) |
7.11 |
| Conductivity |
121 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
154.6 µeq/L |
| Dissolved organic carbon (DOC) |
1.2861 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.
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| American Bullfrog |
| Northern Green Frog |
| Cambarus dubius |
| Orconectes |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Thienemannimyia group |
Non-Biting Midges
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10 |
| Ephemerella |
Sulphur Mayfly
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10 |
| Dubiraphia |
Riffle Beetle
|
7 |
| Parametriocnemus |
Non-Biting Midges
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7 |
| Chrysops |
Deerfly
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5 |
| Prosimulium |
Black Fly
|
4 |
| Platycentropus |
|
4 |
| Pycnopsyche |
Great Autumn Brown Sedge Caddisfly
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4 |
| Zavrelimyia |
Non-Biting Midges
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4 |
| Limnephilidae |
Northern Casemaker Caddisfly
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4 |
| Pseudolimnophila |
Crane Fly
|
3 |
| Tanypodinae |
Non-Biting Midges
|
3 |
| Optioservus |
Riffle Beetle
|
2 |
| Stempellinella |
Non-Biting Midges
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2 |
| Paraphaenocladius |
Non-Biting Midges
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2 |
| Pisidiidae |
Pill Clam
|
2 |
| Cheumatopsyche |
Net-Spinning Caddisfly
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2 |
| Corynoneura |
Non-Biting Midges
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2 |
| Micropsectra |
Non-Biting Midges
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2 |
| Orthocladius |
Non-Biting Midges
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2 |
| Brillia |
Non-Biting Midges
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1 |
| Lepidostoma |
Little Brown Sedge Caddisfly
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1 |
| Coenagrionidae |
Narrowwinged Damselfly
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1 |
| Lype |
Net Tube Caddisfly
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1 |
| Physa |
Air-Breathing Freshwater Snail
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1 |
| Sialis |
Alderfly
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1 |
| Tubificidae |
Aquatic Worm
|
1 |
| Heteroplectron |
Caddisfly
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1 |
| Heptageniidae |
Flathead Mayfly
|
1 |
| Rhyacophila |
Free-Living Caddisfly
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1 |
| Leptophlebiidae |
Pronggilled Mayfly
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1 |
| Pseudorthocladius |
Non-Biting Midges
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1 |
| Promoresia |
Riffle Beetle
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1 |
| Ephemerellidae |
Spiny Crawler Mayfly
|
1 |
| Thienemanniella |
Non-Biting Midges
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1 |
| Hydroporus |
Water Beetle
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1 |
| Lumbriculidae |
Worm
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1 |
Sampling with a kick net.
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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.
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