MBSS Site Summary for: BRIG-301-A-2008
Located on PATUXENT RIVER in the Brighton Dam watershed,
8-digit code: 02131108.
This stream was visited in the spring on 3/25/2008 and again in the summer on 7/18/2008.
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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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.
(Hint: Screen readers will announce definitions; mouse users can hover over dotted text.)
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Catchment area
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8,894 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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3.2 %
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Agricultural Land Use
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56.8 %
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Forested Land Use
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39.1 %
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Stream Water Quality:
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| Water temperature |
20.2 ° C
|
| Dissolved oxygen (DO) |
6.8 mg/L
|
| pH (lab) |
7.3 |
| Conductivity |
181 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
302.9 µeq/L |
| Dissolved organic carbon (DOC) |
0.8151 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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| Eastern Box Turtle |
| Northern Green Frog |
| Northern Red Salamander |
| Northern Ring-Necked Snake |
| Northern Two-Lined Salamander |
| Wood Frog |
| Cambarus bartonii bartonii |
| Orconectes virilis |
| Garlic Mustard |
| Japanese Stiltgrass |
| Mile-A-Minute |
| Multiflora Rose |
| Oriental Bittersweet |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Prosimulium |
Black Fly
|
26 |
| Amphinemura |
Spring Stonefly
|
20 |
| Cheumatopsyche |
Net-Spinning Caddisfly
|
13 |
| Ephemerella |
Sulphur Mayfly
|
11 |
| Prostoia |
Spring Stonefly
|
8 |
| Chimarra |
Fingernet Caddisfly
|
7 |
| Orthocladiinae |
Midge
|
5 |
| Orthocladius |
Non-Biting Midges
|
5 |
| Thienemannimyia Group |
Non-Biting Midges
|
3 |
| Ameletus |
Combmouthed Minnow Mayfly
|
3 |
| Antocha |
Crane Fly
|
2 |
| Chelifera |
Aquatic Dance Fly
|
2 |
| Eukiefferiella |
Non-Biting Midges
|
2 |
| Polycentropus |
Tube Maker Caddisfly
|
2 |
| Rheotanytarsus |
Non-Biting Midges
|
2 |
| Ferrissia |
Small Air-Breathing Freshwater Limpets
|
1 |
| Parametriocnemus |
Non-Biting Midges
|
1 |
| Paraphaenocladius |
Non-Biting Midges
|
1 |
| Polypedilum |
Non-Biting Midges
|
1 |
| Nanocladius |
Non-Biting Midges
|
1 |
| Hydropsyche |
Net-Spinning Caddisfly
|
1 |
| Ablabesmyia |
Non-Biting Midge
|
1 |
| Clinocera |
Aquatic Dance Fly
|
1 |
| Taenionema |
|
1 |
| Hexatoma |
Crane Fly
|
1 |
| Rhyacophila |
Free-Living Caddisfly
|
1 |
| Prostoma |
Freshwater Nemertean (Ribbon Worm)
|
1 |
| Acroneuria |
Golden Stoneflies
|
1 |
| Epeorus |
Mayfly
|
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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