MBSS Site Summary for: CORS-122-H-2007
Located on Three Bridges Branch UT2 in the Corsica River watershed,
8-digit code: 02130507.
This stream was visited in the spring on 4/18/2007 and again in the summer on 6/20/2007.
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 - 4.0 / 5.0
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Benthic IBI
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Good - 4.4 / 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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1,730 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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2.6 %
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Agricultural Land Use
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72.6 %
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Forested Land Use
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24.1 %
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Stream Water Quality:
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| Water temperature |
21.3 ° C
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| Dissolved oxygen (DO) |
6.8 mg/L
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| pH (lab) |
7.13 |
| Conductivity |
270 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
532.6 µeq/L |
| Dissolved organic carbon (DOC) |
9.0992 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 |
| Northern Green Frog |
| Orconectes limosus |
| Procambarus clarkii |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Orthocladius |
Non-Biting Midges
|
30 |
| Isoperla |
Stripetail Stonefly
|
13 |
| Polypedilum |
Non-Biting Midges
|
5 |
| Thienemannimyia group |
Non-Biting Midges
|
5 |
| Stenelmis |
Beetle
|
5 |
| Gammarus |
Amphipod
|
4 |
| Caecidotea |
Isopod
|
3 |
| Pseudorthocladius |
Non-Biting Midges
|
3 |
| Tanytarsus |
Non-Biting Midges
|
3 |
| Natarsia |
Non-Biting Midges
|
2 |
| Leptophlebiidae |
Pronggilled Mayfly
|
2 |
| Baetidae |
Small Minnow Mayfly
|
2 |
| Tvetenia |
Non-Biting Midges
|
2 |
| Hydropsyche |
Net-Spinning Caddisfly
|
2 |
| Prosimulium |
Black Fly
|
2 |
| Simulium |
Black Fly
|
1 |
| Neophylax |
Caddisfly
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1 |
| Calopteryx |
Damselfly
|
1 |
| Heptageniidae |
Flathead Mayfly
|
1 |
| Stenonema |
Flatheaded Mayfly
|
1 |
| Physa |
Air-Breathing Freshwater Snail
|
1 |
| Bezzia |
Biting Midge
|
1 |
| Ablabesmyia |
Non-Biting Midge
|
1 |
| Paramerina |
Non-Biting Midge
|
1 |
| Eukiefferiella |
Non-Biting Midges
|
1 |
| Cheumatopsyche |
Net-Spinning Caddisfly
|
1 |
| Parametriocnemus |
Non-Biting Midges
|
1 |
| Paraphaenocladius |
Non-Biting Midges
|
1 |
| Ironoquia |
Northern Caddisfly
|
1 |
| Pisidiidae |
Pill Clam
|
1 |
| Rheocricotopus |
Non-Biting Midges
|
1 |
| Tanypodinae |
Non-Biting Midges
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1 |
| Collembola |
Springtail
|
1 |
| Ceraclea |
Scaly-Winged Sedge Caddisfly
|
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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