MBSS Site Summary for: MATT-309-A-2009
Located on Mattawoman Creek in the Mattawoman Creek watershed,
8-digit code: 02140111.
This stream was visited in the spring on 3/31/2009 and again in the summer on 8/13/2009.
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 - 4.7 / 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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30,583 acres
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An example of a highly channelized urban stream.
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Urban Land Use
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21 %
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Agricultural Land Use
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17.9 %
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Forested Land Use
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59 %
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Stream Water Quality:
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| Water temperature |
23.5 ° C
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| Dissolved oxygen (DO) |
3.5 mg/L
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Dissolved oxygen levels measured in the stream were very low (3.5 mg/L).
Many fishes and other aquatic animals cannot tolerate low levels of oxygen in the water.
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| pH (lab) |
6.89 |
| Conductivity |
123 µmho/cm
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Alkalinity
(acid neutralizing capacity)
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209.1 µeq/L |
| Dissolved organic carbon (DOC) |
5.0237 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 |
| Eastern American Toad |
| Northern Black Racer |
| Northern Green Frog |
| Northern Spring Peeper |
| Northern Two-Lined Salamander |
| Japanese Stiltgrass |
| Multiflora Rose |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Stenelmis |
Beetle
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17 |
| Tanytarsus |
Non-Biting Midges
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14 |
| Micropsectra |
Non-Biting Midges
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8 |
| Stempellinella |
Non-Biting Midges
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8 |
| Acerpenna |
Tiny Blue-Winged Olive Mayflies
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8 |
| Caecidotea |
Isopod
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8 |
| Hydrobaenus |
Midge
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7 |
| Isoperla |
Stripetail Stonefly
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7 |
| Tubificidae |
Aquatic Worm
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5 |
| Perlidae |
Common Stonefly
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4 |
| Ancyronyx |
Spider Riffle Beetle
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4 |
| Orthocladius |
Non-Biting Midges
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4 |
| Rheotanytarsus |
Non-Biting Midges
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3 |
| Tanytarsini |
Non-Biting Midges
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3 |
| Perlodidae |
Perlodid Stonefly
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3 |
| Optioservus |
Riffle Beetle
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3 |
| Lumbriculidae |
Worm
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3 |
| Musculium |
Fingernail Clam
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3 |
| Ceratopogonidae |
Biting Midge
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2 |
| Neophylax |
Caddisfly
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2 |
| Corbicula |
Basket Clam
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2 |
| Ephemerellidae |
Spiny Crawler Mayfly
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2 |
| Tribelos |
Non-Biting Midges
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1 |
| Sphaeromias |
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1 |
| Physa |
Air-Breathing Freshwater Snail
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1 |
| Strophopteryx |
Early Brown Stonefly
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1 |
| Rhyacophila |
Free-Living Caddisfly
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1 |
| Prostoma |
Freshwater Nemertean (Ribbon Worm)
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1 |
| Maccaffertium |
March Brown And Cahill Mayfly
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1 |
| Eurylophella |
Mayfly
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1 |
| Ablabesmyia |
Non-Biting Midge
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1 |
| Chironomini |
Non-Biting Midge
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1 |
| Cricotopus |
Non-Biting Midges
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1 |
| Dicrotendipes |
Non-Biting Midges
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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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