MBSS Site Summary for: WEBR-201-R-2001
Located on LOTTSFORD BR in the Western Branch watershed,
8-digit code: 02131103.
This stream was visited in the spring on 3/23/2001 and again in the summer on 7/24/2001.
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 - 5.0 / 5.0
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Benthic IBI
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Fair - 3.6 / 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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5,965 acres
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An example of a highly channelized urban stream.
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Urban Land Use
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53 %
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Agricultural Land Use
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13 %
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Forested Land Use
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33 %
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Stream Water Quality:
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| Water temperature |
23.1 ° 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) |
7.05 |
| Conductivity |
250 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
513.7 µeq/L |
| Dissolved organic carbon (DOC) |
8.5 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 |
| Northern Spring Peeper |
| Wood Frog |
| 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 |
| Tubificidae |
Aquatic Worm
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11 |
| Polypedilum |
Non-Biting Midges
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10 |
| Stictochironomus |
Non-Biting Midge
|
9 |
| Sphaerium |
Fingernail Clam
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9 |
| Cheumatopsyche |
Net-Spinning Caddisfly
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6 |
| Ablabesmyia |
Non-Biting Midge
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5 |
| Cryptochironomus |
Non-Biting Midges
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4 |
| Limnodrilus |
Worm
|
4 |
| Orthocladiinae A |
Non-Biting Midges
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3 |
| Conchapelopia |
Non-Biting Midges
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3 |
| Cricotopus/Orthocladius |
Midge
|
3 |
| Tipula |
Crane Fly
|
2 |
| Stagnicola |
Air Breathing Freshwater Snail
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2 |
| Stenochironomus |
European Non-Biting Midge
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2 |
| Rheosmittia |
Non-Biting Midges
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2 |
| Tanytarsus |
Non-Biting Midges
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2 |
| Dubiraphia |
Riffle Beetle
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1 |
| Ancyronyx |
Spider Riffle Beetle
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1 |
| Lumbriculidae |
Worm
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1 |
| Tanypodinae |
Non-Biting Midges
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1 |
| Brillia |
Non-Biting Midges
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1 |
| Naididae |
Aquatic Worm
|
1 |
| Notonecta |
|
1 |
| Viviparus |
|
1 |
| Tipulidae |
Cranefly
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1 |
| Calopteryx |
Damselfly
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1 |
| Stenelmis |
Beetle
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1 |
| Coenagrionidae |
Narrowwinged Damselfly
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1 |
| Stenonema |
Flatheaded Mayfly
|
1 |
| Gordiidae |
Horsehair Worm
|
1 |
| Caecidotea |
Isopod
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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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