MBSS Site Summary for: WA-V-072-104-95
Located on ROCKDALE RUN UT1 TO UT1 in the Conococheague Creek watershed,
8-digit code: 02140504.
This stream was visited in the spring on 3/13/1995 and again in the summer on 7/7/1995.
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 - 1.7 / 5.0
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Benthic IBI
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Fair - 3.0 / 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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73 acres
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An example of a forested stream.
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Urban Land Use
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0 %
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Agricultural Land Use
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7.5 %
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Forested Land Use
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90.1 %
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Stream Water Quality:
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| Water temperature |
22.5 ° C
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| Dissolved oxygen (DO) |
6.6 mg/L
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| pH (lab) |
6.74 |
| Conductivity |
50 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
175.2 µeq/L |
| Dissolved organic carbon (DOC) |
26 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 2 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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38 |
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Fantail Darter
|
1 |
Electrofishing to sample fish communities.
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| Eastern Box Turtle |
| Northern Dusky Salamander |
| Northern Red 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 |
| Parametriocnemus |
Non-Biting Midges
|
25 |
| Prosimulium |
Black Fly
|
17 |
| Ephemerella |
Sulphur Mayfly
|
14 |
| Stegopterna |
Black Fly
|
11 |
| Tanytarsus |
Non-Biting Midges
|
8 |
| Perlodidae |
Perlodid Stonefly
|
8 |
| Ostrocerca |
Stonefly
|
7 |
| Leuctra |
Rolled-Winged Stonefly
|
7 |
| Ameletus |
Combmouthed Minnow Mayfly
|
6 |
| Paraleptophlebia |
Blue Quill Mayfly
|
4 |
| Corynoneura |
Non-Biting Midges
|
4 |
| Eukiefferiella |
Non-Biting Midges
|
2 |
| Eccoptura |
Yellow Stone Stonefly
|
2 |
| Dolophilodes |
Medium Evening Sedge Caddisfly
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2 |
| Diplectrona |
Net-Spinning Caddisfly
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1 |
| Brillia |
Non-Biting Midges
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1 |
| Tipula |
Crane Fly
|
1 |
| Rhyacophila |
Free-Living Caddisfly
|
1 |
| Neophylax |
Caddisfly
|
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.
