MBSS Site Summary for: NANJ-331-S-2004
Located on MILL RUN NANJEMOY CR in the Nanjemoy Creek watershed,
8-digit code: 02140110.
This stream was visited in the spring on 4/15/2004 and again in the summer on 8/10/2004.
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.
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Fish IBI
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Good - 4.0 / 5.0
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Benthic IBI
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Good - 5.0 / 5.0
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Land Use
Land use can provide important information for determining stream health.
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Catchment area
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6,272 acres
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An example of a forested stream.
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Urban Land Use
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2.7 %
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Agricultural Land Use
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20.4 %
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Forested Land Use
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75.3 %
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Stream Water Quality:
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| Water temperature |
21 ° C
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| Dissolved oxygen (DO) |
7.7 mg/L
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| pH (lab) |
5.97 |
| Conductivity |
72 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
34.5 µeq/L |
| Dissolved organic carbon (DOC) |
4.2 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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| American Bullfrog |
| Common Five-Lined Skink |
| Northern Green Frog |
| Northern Ring-Necked Snake |
| Northern Spring Peeper |
| Japanese Honeysuckle |
| Japanese Stiltgrass |
| Multiflora Rose |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Acerpenna |
Tiny Blue-Winged Olive Mayflies
|
12 |
| Eccoptura |
Yellow Stone Stonefly
|
11 |
| Stenonema |
Flatheaded Mayfly
|
9 |
| Tanytarsus |
Non-Biting Midges
|
8 |
| Thienemannimyia group |
Non-Biting Midges
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8 |
| Ephemerella |
Sulphur Mayfly
|
7 |
| Eurylophella |
Mayfly
|
5 |
| Ironoquia |
Northern Caddisfly
|
3 |
| Ablabesmyia |
Non-Biting Midge
|
3 |
| Rheocricotopus |
Non-Biting Midges
|
3 |
| Rheosmittia |
Non-Biting Midges
|
2 |
| Amphinemura |
Spring Stonefly
|
2 |
| Dineutus |
Whirlygig Beetle
|
2 |
| Lumbriculidae |
Worm
|
2 |
| Orthocladius |
Non-Biting Midges
|
2 |
| Parametriocnemus |
Non-Biting Midges
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2 |
| Pycnopsyche |
Great Autumn Brown Sedge Caddisfly
|
2 |
| Chloroperlidae |
Green Stonefly
|
2 |
| Calopteryx |
Damselfly
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2 |
| Ceratopogonidae |
Biting Midge
|
2 |
| Perlidae |
Common Stonefly
|
1 |
| Tipulidae |
Cranefly
|
1 |
| Crangonyx |
Amphipod
|
1 |
| Synurella |
Amphipod
|
1 |
| Stenochironomus |
European Non-Biting Midge
|
1 |
| Paraphaenocladius |
Non-Biting Midges
|
1 |
| Polypedilum |
Non-Biting Midges
|
1 |
| Hydrobaenus |
Midge
|
1 |
| Lype |
Net Tube Caddisfly
|
1 |
| Diplectrona |
Net-Spinning Caddisfly
|
1 |
| Isoperla |
Stripetail Stonefly
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1 |
| Perlodidae |
Perlodid Stonefly
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1 |
| Leptophlebia |
Pronggilled Mayfly
|
1 |
| Stempellinella |
Non-Biting Midges
|
1 |
| Paracladopelma |
Non-Biting Midge
|
1 |
| Tribelos |
Non-Biting Midges
|
1 |
| Trissopelopia |
Non-Biting Midges
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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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