MBSS Site Summary for: NANJ-321-A-2007
Located on Wards Run in the Nanjemoy Creek watershed,
8-digit code: 02140110.
This stream was visited in the spring on 3/28/2007 and again in the summer on 7/16/2007.
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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Fair - 3.7 / 5.0
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Benthic IBI
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Good - 4.7 / 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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4,720 acres
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An example of a forested stream.
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Urban Land Use
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3.1 %
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Agricultural Land Use
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15.1 %
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Forested Land Use
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77.7 %
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Stream Water Quality:
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| Water temperature |
23.2 ° C
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| Dissolved oxygen (DO) |
6.8 mg/L
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| pH (lab) |
6.73 |
| Conductivity |
44 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
99.8 µeq/L |
| Dissolved organic carbon (DOC) |
3.7408 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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| Japanese Honeysuckle |
| Japanese Stiltgrass |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Cheumatopsyche |
Net-Spinning Caddisfly
|
9 |
| Rheocricotopus |
Non-Biting Midges
|
8 |
| Stenelmis |
Beetle
|
8 |
| Simulium |
Black Fly
|
6 |
| Amphinemura |
Spring Stonefly
|
6 |
| Isoperla |
Stripetail Stonefly
|
5 |
| Leuctra |
Rolled-Winged Stonefly
|
5 |
| Chimarra |
Fingernet Caddisfly
|
4 |
| Stenonema |
Flatheaded Mayfly
|
4 |
| Stempellina |
|
4 |
| Rheosmittia |
Non-Biting Midges
|
3 |
| Polypedilum |
Non-Biting Midges
|
3 |
| Macronychus |
Riffle Beetle
|
3 |
| Optioservus |
Riffle Beetle
|
3 |
| Oecetis |
Long-Horned Caddisfly
|
3 |
| Triaenodes |
Long-Horned Caddisfly
|
3 |
| Acerpenna |
Tiny Blue-Winged Olive Mayflies
|
3 |
| Parametriocnemus |
Non-Biting Midges
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2 |
| Prostoma |
Freshwater Nemertean (Ribbon Worm)
|
2 |
| Hexatoma |
Crane Fly
|
2 |
| Synurella |
Amphipod
|
2 |
| Prosimulium |
Black Fly
|
2 |
| Nigronia |
Megaloptera (Dark Fishfly)
|
2 |
| Ablabesmyia |
Non-Biting Midge
|
2 |
| Unniella |
Non-Biting Midge
|
2 |
| Cricotopus |
Non-Biting Midges
|
1 |
| Micropsectra |
Non-Biting Midges
|
1 |
| Nanocladius |
Non-Biting Midges
|
1 |
| Hydropsyche |
Net-Spinning Caddisfly
|
1 |
| Pseudorthocladius |
Non-Biting Midges
|
1 |
| Tanytarsini |
Non-Biting Midges
|
1 |
| Dubiraphia |
Riffle Beetle
|
1 |
| Neophylax |
Caddisfly
|
1 |
| Hagenius |
Clubtail Dragonfly
|
1 |
| Stylogomphus |
Clubtail Dragonfly
|
1 |
| Calopteryx |
Damselfly
|
1 |
| Sphaerium |
Fingernail Clam
|
1 |
| Cura |
Flatworm
|
1 |
| Chloroperlidae |
Green Stonefly
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1 |
| Piscicolidae |
Leech
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1 |
| Eurylophella |
Mayfly
|
1 |
| Polycentropus |
Tube Maker Caddisfly
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1 |
| Lumbriculidae |
Worm
|
1 |
| Eccoptura |
Yellow Stone Stonefly
|
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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