MBSS Site Summary for: PAXU-404-R-2008
Located on PATUXENT RIVER in the Patuxent River upper watershed,
8-digit code: 02131104.
This stream was visited in the spring on 4/10/2008 and again in the summer on 8/6/2008.
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 - 4.7 / 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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111,880 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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12.7 %
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Agricultural Land Use
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49.5 %
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Forested Land Use
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35.4 %
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Stream Water Quality:
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| Water temperature |
22.8 ° C
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| Dissolved oxygen (DO) |
6.5 mg/L
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| pH (lab) |
7.19 |
| Conductivity |
264 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
694.6 µeq/L |
| Dissolved organic carbon (DOC) |
3.734 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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| Eastern American Toad |
| Eastern Cricket Frog |
| Marbled Salamander |
| Northern Green Frog |
| Northern Ring-Necked Snake |
| Northern Spring Peeper |
| Northern Two-Lined Salamander |
| Pickerel Frog |
| Orconectes limosus |
| Procambarus clarkii |
| Garlic Mustard |
| Japanese Barberry |
| Japanese Honeysuckle |
| Japanese Stiltgrass |
| Mile-A-Minute |
| Multiflora Rose |
| Privet |
| Vinca Vine |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Orthocladius |
Non-Biting Midges
|
18 |
| Tanytarsus |
Non-Biting Midges
|
14 |
| Simulium |
Black Fly
|
13 |
| Cheumatopsyche |
Net-Spinning Caddisfly
|
7 |
| Baetidae |
Small Minnow Mayfly
|
6 |
| Maccaffertium |
March Brown And Cahill Mayfly
|
5 |
| Gammarus |
Amphipod
|
5 |
| Ancyronyx |
Spider Riffle Beetle
|
4 |
| Polypedilum |
Non-Biting Midges
|
3 |
| Crangonyx |
Amphipod
|
3 |
| Corynoneura |
Non-Biting Midges
|
2 |
| Orthocladiinae |
Midge
|
2 |
| Tubificidae |
Aquatic Worm
|
2 |
| Simuliidae |
Black Fly
|
2 |
| Perlidae |
Common Stonefly
|
2 |
| Stenochironomus |
European Non-Biting Midge
|
2 |
| Polycentropus |
Tube Maker Caddisfly
|
2 |
| Amphipoda |
Scud
|
2 |
| Limnodrilus |
Worm
|
1 |
| Acerpenna |
Tiny Blue-Winged Olive Mayflies
|
1 |
| Hemerodromia |
Tiny Fly
|
1 |
| Centroptilum |
Small Minnow Mayfly
|
1 |
| Potthastia |
Non-Biting Midges
|
1 |
| Rheocricotopus |
Non-Biting Midges
|
1 |
| Thienemannimyia Group |
Non-Biting Midges
|
1 |
| Tribelos |
Non-Biting Midges
|
1 |
| Tvetenia |
Non-Biting Midges
|
1 |
| Pisidiidae |
Pill Clam
|
1 |
| Ceraclea |
Scaly-Winged Sedge Caddisfly
|
1 |
| Chimarra |
Fingernet Caddisfly
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1 |
| Triaenodes |
Long-Horned Caddisfly
|
1 |
| Gomphus |
Clubtail Dragonfly
|
1 |
| Hagenius |
Clubtail Dragonfly
|
1 |
| Aeshna |
Mosaic Darner Dragonflies
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1 |
| Hydrobaenus |
Midge
|
1 |
| Ablabesmyia |
Non-Biting Midge
|
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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