MBSS Site Summary for: MPAX-401-R-2007
Located on Middle Patuxent River in the Middle Patuxent River watershed,
8-digit code: 02131106.
This stream was visited in the spring on 4/18/2007 and again in the summer on 7/18/2007.
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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Good - 4.7 / 5.0
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Benthic IBI
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Fair - 3.3 / 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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30,888 acres
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Cows survey the sampling procedure at this extreme example of a highly agriculturalized site.
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Urban Land Use
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7.3 %
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Agricultural Land Use
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70.1 %
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Forested Land Use
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21.6 %
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Stream Water Quality:
|
| Water temperature |
22.3 ° C
|
| Dissolved oxygen (DO) |
7 mg/L
|
| pH (lab) |
7.61 |
| Conductivity |
282 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
833.5 µeq/L |
| Dissolved organic carbon (DOC) |
1.9168 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 |
| Eastern Box Turtle |
| Eastern Hog-Nosed Snake |
| Fowler's Toad |
| Northern Green Frog |
| Northern Spring Peeper |
| Northern Two-Lined Salamander |
| Northern Watersnake |
| Pickerel Frog |
| Spotted Salamander |
| Wood Frog |
| Orconectes limosus |
| Orconectes virilis |
| Autumn Olive |
| Garlic Mustard |
| Japanese Barberry |
| 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 |
| Simulium |
Black Fly
|
27 |
| Cheumatopsyche |
Net-Spinning Caddisfly
|
14 |
| Stenonema |
Flatheaded Mayfly
|
13 |
| Ephemerella |
Sulphur Mayfly
|
10 |
| Polypedilum |
Non-Biting Midges
|
8 |
| Orthocladius |
Non-Biting Midges
|
7 |
| Hydrobaenus |
Midge
|
6 |
| Amphinemura |
Spring Stonefly
|
4 |
| Hydropsyche |
Net-Spinning Caddisfly
|
3 |
| Perlidae |
Common Stonefly
|
3 |
| Rheocricotopus |
Non-Biting Midges
|
3 |
| Rheosmittia |
Non-Biting Midges
|
3 |
| Tipula |
Crane Fly
|
2 |
| Orthocladiinae |
Midge
|
2 |
| Dolichopodidae |
Long-Legged Fly
|
1 |
| Paratendipes |
European Non-Biting Midge
|
1 |
| Chimarra |
Fingernet Caddisfly
|
1 |
| Stempellinella |
Non-Biting Midges
|
1 |
| Sympotthastia |
Non-Biting Midges
|
1 |
| Tanytarsus |
Non-Biting Midges
|
1 |
| Thienemannimyia group |
Non-Biting Midges
|
1 |
| Baetidae |
Small Minnow Mayfly
|
1 |
| Stenelmis |
Beetle
|
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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