MBSS Site Summary for: GA-A-373-220-95
Located on ROCKLICK CR in the Youghiogheny River watershed,
8-digit code: 05020201.
This stream was visited in the spring on 4/3/1995 and again in the summer on 7/31/1995.
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 - 2.0 / 5.0
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Benthic IBI
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Fair - 3.8 / 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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749 acres
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An example of a forested stream.
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Urban Land Use
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0.9 %
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Agricultural Land Use
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44.6 %
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Forested Land Use
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54.5 %
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Stream Water Quality:
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| Water temperature |
20 ° C
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| Dissolved oxygen (DO) |
7.2 mg/L
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| pH (lab) |
7.54 |
| Conductivity |
235 µmho/cm
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Alkalinity
(acid neutralizing capacity)
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279.8 µeq/L |
| Dissolved organic carbon (DOC) |
2 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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The following 4 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Common name |
Count |
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Blacknose Dace
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225 |
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Creek Chub
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168 |
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Bluegill
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1 |
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Pumpkinseed
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1 |
Electrofishing to sample fish communities.
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| Allegheny Mountain Dusky Salamander |
| Northern Dusky Salamander |
| Northern Two-Lined Salamander |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Orthocladius |
Non-Biting Midges
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19 |
| Ephemerella |
Sulphur Mayfly
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17 |
| Serratella |
Mayfly
|
12 |
| Eukiefferiella |
Non-Biting Midges
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7 |
| Micropsectra |
Non-Biting Midges
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7 |
| Baetis |
Blue-Winged Olive Mayfly
|
6 |
| Oulimnius |
Riffle Beetle
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5 |
| Amphinemura |
Spring Stonefly
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5 |
| Cricotopus |
Non-Biting Midges
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4 |
| Dicranota |
Hairy-Eyed Cranefly
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3 |
| Chimarra |
Fingernet Caddisfly
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3 |
| Rhyacophila |
Free-Living Caddisfly
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3 |
| Paraleptophlebia |
Blue Quill Mayfly
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2 |
| Parametriocnemus |
Non-Biting Midges
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2 |
| Thienemanniella |
Non-Biting Midges
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2 |
| Perlodidae |
Perlodid Stonefly
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1 |
| Promoresia |
Riffle Beetle
|
1 |
| Hemerodromia |
Tiny Fly
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1 |
| Caecidotea |
Isopod
|
1 |
| Nigronia |
Megaloptera (Dark Fishfly)
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1 |
| Hydropsyche |
Net-Spinning Caddisfly
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1 |
| Corynoneura |
Non-Biting Midges
|
1 |
| Acroneuria |
Golden Stoneflies
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1 |
| Micrasema |
|
1 |
| Pagastia |
|
1 |
| Stenelmis |
Beetle
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1 |
| Tabanus |
Biting Horsefly
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1 |
| Probezzia |
Biting Midges
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1 |
| Simuliidae |
Black Fly
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1 |
| Diamesa |
Bloodworm
|
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.
