MBSS Site Summary for: NANJ-331-S-2006
Located on Mill Run in the Nanjemoy Creek watershed,
8-digit code: 02140110.
This stream was visited in the spring on 3/15/2006 and again in the summer on 7/18/2006.
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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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 |
22.6 ° C
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| Dissolved oxygen (DO) |
8.8 mg/L
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| pH (lab) |
6.77 |
| Conductivity |
59 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
111.5 µeq/L |
| Dissolved organic carbon (DOC) |
2.863 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 |
| Eastern American Toad |
| Orconectes limosus |
| Procambarus clarkii |
| Japanese Honeysuckle |
| Japanese Stiltgrass |
| Mile-A-Minute |
| Multiflora Rose |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Hydrobaenus |
Midge
|
26 |
| Orthocladius |
Non-Biting Midges
|
14 |
| Siphlonurus |
Gray Drake Mayfly
|
9 |
| Leptophlebiidae |
Pronggilled Mayfly
|
9 |
| Baetidae |
Small Minnow Mayfly
|
4 |
| Ancyronyx |
Spider Riffle Beetle
|
4 |
| Amphinemura |
Spring Stonefly
|
4 |
| Prostoia |
Spring Stonefly
|
4 |
| Parametriocnemus |
Non-Biting Midges
|
4 |
| Isoperla |
Stripetail Stonefly
|
3 |
| Rheocricotopus |
Non-Biting Midges
|
3 |
| Ablabesmyia |
Non-Biting Midge
|
2 |
| Thienemannimyia group |
Non-Biting Midges
|
2 |
| Nanocladius |
Non-Biting Midges
|
2 |
| Paraphaenocladius |
Non-Biting Midges
|
2 |
| Potthastia |
Non-Biting Midges
|
1 |
| Triaenodes |
Long-Horned Caddisfly
|
1 |
| Eurylophella |
Mayfly
|
1 |
| Diplectrona |
Net-Spinning Caddisfly
|
1 |
| Palaemonetes |
|
1 |
| Leuctra |
Rolled-Winged Stonefly
|
1 |
| Synurella |
Amphipod
|
1 |
| Perlidae |
Common Stonefly
|
1 |
| Parakiefferiella |
European Non-Biting Midge
|
1 |
| Musculium |
Fingernail Clam
|
1 |
| Prostoma |
Freshwater Nemertean (Ribbon Worm)
|
1 |
| Ptilostomis |
Giant Casemaker Caddisfly
|
1 |
| Ostrocerca |
Stonefly
|
1 |
| Ephemerellidae |
Spiny Crawler Mayfly
|
1 |
| Dubiraphia |
Riffle Beetle
|
1 |
| Optioservus |
Riffle Beetle
|
1 |
| Trissopelopia |
Non-Biting Midges
|
1 |
| Zavrelimyia |
Non-Biting Midges
|
1 |
| Ironoquia |
Northern Caddisfly
|
1 |
| Limnephilidae |
Northern Casemaker Caddisfly
|
1 |
| Paramerina |
Non-Biting Midge
|
1 |
| Diplocladius |
Non-Biting Midges
|
1 |
| Tanytarsus |
Non-Biting Midges
|
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.
