MBSS Site Summary for: CORS-104-X-2009
Located on Three Bridges Branch in the Corsica River watershed,
8-digit code: 02130507.
This stream was visited in the spring on 3/9/2009 and again in the summer on 6/15/2009.
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 - 5.0 / 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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1,977 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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2.3 %
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Agricultural Land Use
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73.6 %
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Forested Land Use
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23.1 %
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Stream Water Quality:
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| Water temperature |
18.6 ° C
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| Dissolved oxygen (DO) |
7.7 mg/L
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| pH (lab) |
7.6 |
| Conductivity |
266 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
832.8 µeq/L |
| Dissolved organic carbon (DOC) |
7.4454 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 |
| Pickerel Frog |
| Orconectes |
| Orconectes limosus |
| Procambarus clarkii |
| Japanese Stiltgrass |
| Multiflora Rose |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Maccaffertium |
March Brown And Cahill Mayfly
|
10 |
| Cheumatopsyche |
Net-Spinning Caddisfly
|
8 |
| Thienemannimyia Group |
Non-Biting Midges
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7 |
| Tvetenia |
Non-Biting Midges
|
6 |
| Rheotanytarsus |
Non-Biting Midges
|
6 |
| Ephemerella |
Sulphur Mayfly
|
6 |
| Microtendipes |
Non-Biting Midges
|
6 |
| Prosimulium |
Black Fly
|
6 |
| Isoperla |
Stripetail Stonefly
|
5 |
| Macronychus |
Riffle Beetle
|
5 |
| Orthocladius |
Non-Biting Midges
|
4 |
| Polypedilum |
Non-Biting Midges
|
4 |
| Gammarus |
Amphipod
|
3 |
| Diplocladius |
Non-Biting Midges
|
3 |
| Nigronia |
Megaloptera (Dark Fishfly)
|
2 |
| Physa |
Air-Breathing Freshwater Snail
|
2 |
| Rheosmittia |
Non-Biting Midges
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2 |
| Parametriocnemus |
Non-Biting Midges
|
2 |
| Paratanytarsus |
Non-Biting Midges
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2 |
| Leptophlebiidae |
Pronggilled Mayfly
|
1 |
| Dubiraphia |
Riffle Beetle
|
1 |
| Ancyronyx |
Spider Riffle Beetle
|
1 |
| Boyeria |
Spotted Darner Dragonfly
|
1 |
| Tanypodinae |
Non-Biting Midges
|
1 |
| Acerpenna |
Tiny Blue-Winged Olive Mayflies
|
1 |
| Hemerodromia |
Tiny Fly
|
1 |
| Goniobasis |
|
1 |
| Hydrobaenus |
Midge
|
1 |
| Neophylax |
Caddisfly
|
1 |
| Musculium |
Fingernail Clam
|
1 |
| Clioperla |
Green-Winged Stonefly
|
1 |
| Oecetis |
Long-Horned Caddisfly
|
1 |
| Nanocladius |
Non-Biting Midges
|
1 |
| Diplectrona |
Net-Spinning Caddisfly
|
1 |
| Brillia |
Non-Biting Midges
|
1 |
| Cryptochironomus |
Non-Biting Midges
|
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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