MBSS Site Summary for: NASS-217-R-2015
Located on NASSAWANGO CREEK in the Nassawango Creek watershed,
8-digit code: 02130205.
This stream was visited in the spring on 3/10/2015 and again in the summer on 8/24/2015.
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 - 4.3 / 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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9,779 acres
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An example of a forested stream.
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Urban Land Use
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7.7 %
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Agricultural Land Use
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32.1 %
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Forested Land Use
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52 %
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An example of woody debris in a stream.
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Physical Stream Habitat
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Instream Habitat
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16/20 (Optimal)
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Epifaunal Substrate
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18/20 (Optimal)
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Velocity/Depth Diversity
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11/20 (Suboptimal)
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Pool Quality
Pool Extent = 75 meters
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16/20 (Optimal)
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Riffle Quality
Riffle Extent = 7 meters
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9/20 (Marginal)
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Shading
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80 % |
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Embeddedness
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100 % |
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The embeddedness, a measure of silt on the stream bottom, was 100%. This is
very high, and may adversely affect biotic communities.
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Several measures of instream habitat were considered 'Optimal' at this location.
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Stream Water Quality:
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| pH (lab) |
6.75 |
Alkalinity
(acid neutralizing capacity)
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166.2 µeq/L |
| Dissolved organic carbon (DOC) |
13.8565 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 |
| Pickerel Frog |
| Japanese Honeysuckle |
| Multiflora Rose |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Stegopterna |
Black Fly
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19 |
| Diplocladius |
Non-Biting Midges
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17 |
| Enchytraeidae |
Aquatic Worm
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13 |
| Simulium |
Black Fly
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11 |
| Tvetenia |
Non-Biting Midges
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9 |
| Synurella |
Amphipod
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6 |
| Caecidotea |
Isopod
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5 |
| Hydrobaenus |
Midge
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5 |
| Orthocladius |
Non-Biting Midges
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5 |
| Leptophlebia |
Pronggilled Mayfly
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3 |
| Limnephilidae |
Northern Casemaker Caddisfly
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3 |
| Parametriocnemus |
Non-Biting Midges
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2 |
| Paraphaenocladius |
Non-Biting Midges
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2 |
| Limnophyes |
Non-Biting Midge
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2 |
| Dicrotendipes |
Non-Biting Midges
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2 |
| Ormosia |
Cranefly
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2 |
| Tabanus |
Biting Horsefly
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2 |
| Hexatoma |
Crane Fly
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2 |
| Pseudolimnophila |
Crane Fly
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1 |
| Naididae |
Aquatic Worm
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1 |
| Bryophaenocladius |
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1 |
| Crangonyx |
Amphipod
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1 |
| Pycnopsyche |
Great Autumn Brown Sedge Caddisfly
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1 |
| Micropsectra |
Non-Biting Midges
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1 |
| Pseudorthocladius |
Non-Biting Midges
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1 |
| Diptera |
True Fly
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1 |
| Taeniopteryx |
Winter Stonefly
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1 |
| Lumbriculidae |
Worm
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1 |
| Dytiscidae |
Predaceous Diving Beetle
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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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