MBSS Site Summary for: NANJ-331-S-2015
Located on MILL RUN in the Nanjemoy Creek watershed,
8-digit code: 02140110.
This stream was visited in the spring on 3/12/2015 and again in the summer on 8/12/2015.
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 - 4.7 / 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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6,272 acres
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An example of a forested stream.
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Urban Land Use
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8.3 %
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Agricultural Land Use
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11.5 %
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Forested Land Use
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77 %
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Stream Water Quality:
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| pH (lab) |
6.22 |
Alkalinity
(acid neutralizing capacity)
|
60.9957 µeq/L |
| Dissolved organic carbon (DOC) |
3.6002 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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| Northern Green Frog |
| Pickerel Frog |
| Bush 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 |
| Rheotanytarsus |
Non-Biting Midges
|
11 |
| Paratanytarsus |
Non-Biting Midges
|
10 |
| Oulimnius |
Riffle Beetle
|
7 |
| Capniidae |
Small Winter Stonefly
|
7 |
| Strophopteryx |
Early Brown Stonefly
|
7 |
| Acerpenna |
Tiny Blue-Winged Olive Mayflies
|
6 |
| Isoperla |
Stripetail Stonefly
|
5 |
| Caecidotea |
Isopod
|
5 |
| Synurella |
Amphipod
|
4 |
| Ephemerellidae |
Spiny Crawler Mayfly
|
4 |
| Optioservus |
Riffle Beetle
|
4 |
| Microtendipes |
Non-Biting Midges
|
4 |
| Ephemerella |
Sulphur Mayfly
|
4 |
| Physa |
Air-Breathing Freshwater Snail
|
3 |
| Nemouridae |
Nemourid Stonefly
|
3 |
| Cheumatopsyche |
Net-Spinning Caddisfly
|
2 |
| Stilocladius |
Midge
|
2 |
| Maccaffertium |
March Brown And Cahill Mayfly
|
2 |
| Prostoia |
Spring Stonefly
|
2 |
| Anafroptilum |
Small Minnow Mayfly
|
1 |
| Parametriocnemus |
Non-Biting Midges
|
1 |
| Sympotthastia |
Non-Biting Midges
|
1 |
| Tribelos |
Non-Biting Midges
|
1 |
| Limnephilidae |
Northern Casemaker Caddisfly
|
1 |
| Perlodidae |
Perlodid Stonefly
|
1 |
| Dytiscidae |
Predaceous Diving Beetle
|
1 |
| Leptophlebia |
Pronggilled Mayfly
|
1 |
| Dubiraphia |
Riffle Beetle
|
1 |
| Nigronia |
Megaloptera (Dark Fishfly)
|
1 |
| Hydrobaenus |
Midge
|
1 |
| Dicrotendipes |
Non-Biting Midges
|
1 |
| Stenelmis |
Beetle
|
1 |
| Hexatoma |
Crane Fly
|
1 |
| Tipula |
Crane Fly
|
1 |
| Chrysops |
Deerfly
|
1 |
| Musculium |
Fingernail Clam
|
1 |
| Pycnopsyche |
Great Autumn Brown Sedge Caddisfly
|
1 |
| Chloroperlidae |
Green Stonefly
|
1 |
| Gordiidae |
Horsehair 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.
