MBSS Site Summary for: SOUT-108-R-2002
Located on TARNANS BR in the South River watershed,
8-digit code: 02131003.
This stream was visited in the spring on 3/11/2002 and again in the summer on 7/23/2002.
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 - 3.0 / 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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1,393 acres
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An example of a forested stream.
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Urban Land Use
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15 %
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Agricultural Land Use
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31 %
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Forested Land Use
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52 %
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Stream Water Quality:
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| Water temperature |
25.2 ° C
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| Dissolved oxygen (DO) |
4.9 mg/L
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Dissolved oxygen levels measured in the stream were very low (4.9 mg/L).
Many fishes and other aquatic animals cannot tolerate low levels of oxygen in the water.
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| pH (lab) |
6.1 |
| Conductivity |
220 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
51.7 µeq/L |
| Dissolved organic carbon (DOC) |
1.5 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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| Eastern American Toad |
| Northern Green Frog |
| Northern Watersnake |
| Pickerel Frog |
| Queen Snake |
| 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 |
| Cheumatopsyche |
Net-Spinning Caddisfly
|
11 |
| Hydropsyche |
Net-Spinning Caddisfly
|
11 |
| Orthocladiinae |
Midge
|
11 |
| Gammarus |
Amphipod
|
10 |
| Parametriocnemus |
Non-Biting Midges
|
7 |
| Dicrotendipes |
Non-Biting Midges
|
5 |
| Hyalella |
Amphipod
|
5 |
| Stegopterna |
Black Fly
|
4 |
| Sympotthastia |
Non-Biting Midges
|
4 |
| Thienemanniella |
Non-Biting Midges
|
3 |
| Thienemannimyia group |
Non-Biting Midges
|
3 |
| Caecidotea |
Isopod
|
3 |
| Ablabesmyia |
Non-Biting Midge
|
3 |
| Ceratopogonidae |
Biting Midge
|
2 |
| Ischnura |
|
2 |
| Pseudosuccinea |
Air Breathing Freshwater Snail
|
2 |
| Orthocladius |
Non-Biting Midges
|
2 |
| Conchapelopia |
Non-Biting Midges
|
2 |
| Tanypodinae |
Non-Biting Midges
|
2 |
| Boyeria |
Spotted Darner Dragonfly
|
2 |
| Hemerodromia |
Tiny Fly
|
1 |
| Polycentropus |
Tube Maker Caddisfly
|
1 |
| Corixidae |
Water Boatman
|
1 |
| Paraphaenocladius |
Non-Biting Midges
|
1 |
| Polypedilum |
Non-Biting Midges
|
1 |
| Tvetenia |
Non-Biting Midges
|
1 |
| Zavrelimyia |
Non-Biting Midges
|
1 |
| Ancyronyx |
Spider Riffle Beetle
|
1 |
| Cryptochironomus |
Non-Biting Midges
|
1 |
| Xylotopus |
Midge
|
1 |
| Microtendipes |
Non-Biting Midges
|
1 |
| Physa |
Air-Breathing Freshwater Snail
|
1 |
| Notonecta |
|
1 |
| Simulium |
Black Fly
|
1 |
| Chironomini |
Non-Biting Midge
|
1 |
| Procladius |
Non-Biting Midge
|
1 |
| Chaetocladius |
Non-Biting Midges
|
1 |
| Chironomus |
Non-Biting Midges
|
1 |
| Tipula |
Crane Fly
|
1 |
| Calopteryx |
Damselfly
|
1 |
| Isotomurus |
Elongate-Bodied Springtail
|
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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