MBSS Site Summary for: BRET-450-H-2007
Located on McIntosh Run in the Breton Bay watershed,
8-digit code: 02140104.
This stream was visited in the spring on 4/19/2007 and again in the summer on 7/23/2007.
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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17,422 acres
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An example of a forested stream.
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Urban Land Use
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4.9 %
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Agricultural Land Use
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26.2 %
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Forested Land Use
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67.9 %
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Stream Water Quality:
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| Water temperature |
20.6 ° C
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| Dissolved oxygen (DO) |
3.6 mg/L
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Dissolved oxygen levels measured in the stream were very low (3.6 mg/L).
Many fishes and other aquatic animals cannot tolerate low levels of oxygen in the water.
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| pH (lab) |
6.81 |
| Conductivity |
127 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
238.7 µeq/L |
| Dissolved organic carbon (DOC) |
4.5156 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 |
| Northern Spring Peeper |
| Northern Two-Lined Salamander |
| Northern Watersnake |
| Cambarus diogenes |
| Orconectes limosus |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Musculium |
Fingernail Clam
|
15 |
| Polypedilum |
Non-Biting Midges
|
11 |
| Tanytarsus |
Non-Biting Midges
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8 |
| Simulium |
Black Fly
|
6 |
| Ablabesmyia |
Non-Biting Midge
|
6 |
| Cricotopus |
Non-Biting Midges
|
6 |
| Caecidotea |
Isopod
|
5 |
| Ephemerella |
Sulphur Mayfly
|
5 |
| Rheosmittia |
Non-Biting Midges
|
4 |
| Triaenodes |
Long-Horned Caddisfly
|
4 |
| Haploperla |
Green Stonefly
|
4 |
| Stenonema |
Flatheaded Mayfly
|
4 |
| Thienemannimyia group |
Non-Biting Midges
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3 |
| Macronychus |
Riffle Beetle
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2 |
| Tanypodinae |
Non-Biting Midges
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2 |
| Rheocricotopus |
Non-Biting Midges
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2 |
| Goniobasis |
|
2 |
| Stenelmis |
Beetle
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2 |
| Paraphaenocladius |
Non-Biting Midges
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1 |
| Dolichopodidae |
Long-Legged Fly
|
1 |
| Leucrocuta |
Mayfly
|
1 |
| Nigronia |
Megaloptera (Dark Fishfly)
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1 |
| Psilotreta |
Mortarjoint Casemaker Caddisfly
|
1 |
| Mallochohelea |
|
1 |
| Enchytraeidae |
Aquatic Worm
|
1 |
| Pycnopsyche |
Great Autumn Brown Sedge Caddisfly
|
1 |
| Gomphus |
Clubtail Dragonfly
|
1 |
| Perlidae |
Common Stonefly
|
1 |
| Hexatoma |
Crane Fly
|
1 |
| Calopteryx |
Damselfly
|
1 |
| Stenochironomus |
European Non-Biting Midge
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1 |
| Optioservus |
Riffle Beetle
|
1 |
| Oulimnius |
Riffle Beetle
|
1 |
| Polycentropus |
Tube Maker Caddisfly
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1 |
| Psephenus |
Water Penny
|
1 |
| Ectopria |
Water Penny Beetle
|
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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