MBSS Site Summary for: NANJ-304-R-2008
Located on NANJEMOY CREEK in the Nanjemoy Creek watershed,
8-digit code: 02140110.
This stream was visited in the spring on 3/11/2008 and again in the summer on 7/23/2008.
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 - 4.7 / 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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10,558 acres
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An example of a forested stream.
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Urban Land Use
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2.2 %
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Agricultural Land Use
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13.8 %
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Forested Land Use
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81.8 %
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Stream Water Quality:
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| Water temperature |
23.9 ° C
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| Dissolved oxygen (DO) |
3.9 mg/L
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Dissolved oxygen levels measured in the stream were very low (3.9 mg/L).
Many fishes and other aquatic animals cannot tolerate low levels of oxygen in the water.
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| pH (lab) |
6.09 |
| Conductivity |
57 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
57.4 µeq/L |
| Dissolved organic carbon (DOC) |
8.4152 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 Cricket Frog |
| Northern Green Frog |
| Upland Chorus Frog |
| Cambarus diogenes |
| Orconectes limosus |
| Procambarus clarkii |
| Japanese Honeysuckle |
| Japanese Stiltgrass |
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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
|
11 |
| Thienemannimyia Group |
Non-Biting Midges
|
8 |
| Maccaffertium |
March Brown And Cahill Mayfly
|
7 |
| Gammarus |
Amphipod
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6 |
| Polypedilum |
Non-Biting Midges
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5 |
| Lumbriculidae |
Worm
|
4 |
| Tanytarsus |
Non-Biting Midges
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4 |
| Parametriocnemus |
Non-Biting Midges
|
3 |
| Stempellinella |
Non-Biting Midges
|
3 |
| Rheocricotopus |
Non-Biting Midges
|
3 |
| Corynoneura |
Non-Biting Midges
|
3 |
| Caecidotea |
Isopod
|
3 |
| Triaenodes |
Long-Horned Caddisfly
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2 |
| Sphaerium |
Fingernail Clam
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2 |
| Prosimulium |
Black Fly
|
2 |
| Tipulidae |
Cranefly
|
2 |
| Macromia |
|
2 |
| Nyctiophylax |
|
2 |
| Stegopterna |
Black Fly
|
2 |
| Eurylophella |
Mayfly
|
2 |
| Limnephilidae |
Northern Casemaker Caddisfly
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2 |
| Capniidae |
Small Winter Stonefly
|
2 |
| Dubiraphia |
Riffle Beetle
|
1 |
| Stenacron |
Mayfly
|
1 |
| Psilotreta |
Mortarjoint Casemaker Caddisfly
|
1 |
| Argia |
Narrow-Winged Damselfly
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1 |
| Microtendipes |
Non-Biting Midges
|
1 |
| Orthocladius |
Non-Biting Midges
|
1 |
| Rheotanytarsus |
Non-Biting Midges
|
1 |
| Heteroplectron |
Caddisfly
|
1 |
| Phylocentropus |
Caddisfly
|
1 |
| Hexatoma |
Crane Fly
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1 |
| Ormosia |
Cranefly
|
1 |
| Bezzia |
Biting Midge
|
1 |
| Aeshnidae |
Darner Dragonfly
|
1 |
| Simuliidae |
Black Fly
|
1 |
| Campeloma |
|
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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