MBSS Site Summary for: RKGR-119-S-2008
Located on UT PATUXENT RIVER in the Rocky Gorge Dam watershed,
8-digit code: 02131107.
This stream was visited in the spring on 3/25/2008 and again in the summer on 7/22/2008.
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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Fair - 3.3 / 5.0
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Benthic IBI
|
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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673 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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4.5 %
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Agricultural Land Use
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58.3 %
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Forested Land Use
|
34.8 %
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Stream Water Quality:
|
| Water temperature |
22.2 ° C
|
| Dissolved oxygen (DO) |
7.1 mg/L
|
| pH (lab) |
7.69 |
| Conductivity |
223 µmho/cm
|
Alkalinity
(acid neutralizing capacity)
|
1088.3 µeq/L |
| Dissolved organic carbon (DOC) |
0.913 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 Box Turtle |
| Gray Treefrog |
| Northern Red Salamander |
| Northern Two-Lined Salamander |
| Pickerel Frog |
| Wood Frog |
| Cambarus bartonii bartonii |
| Orconectes virilis |
| Autumn Olive |
| Garlic Mustard |
| Japanese Barberry |
| Japanese Honeysuckle |
| Japanese Stiltgrass |
| Mile-A-Minute |
| Multiflora Rose |
| Oriental Bittersweet |
| Vinca Vine |
| Wineberry |
|
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Ephemerella |
Sulphur Mayfly
|
49 |
| Amphinemura |
Spring Stonefly
|
18 |
| Prosimulium |
Black Fly
|
14 |
| Perlodidae |
Perlodid Stonefly
|
8 |
| Thienemanniella |
Non-Biting Midges
|
4 |
| Perlidae |
Common Stonefly
|
4 |
| Hexatoma |
Crane Fly
|
2 |
| Simulium |
Black Fly
|
2 |
| Ameletus |
Combmouthed Minnow Mayfly
|
2 |
| Parametriocnemus |
Non-Biting Midges
|
2 |
| Thienemannimyia Group |
Non-Biting Midges
|
2 |
| Elmidae |
Riffle Beetle
|
2 |
| Oulimnius |
Riffle Beetle
|
2 |
| Leuctridae |
Rolledwinged Stonefly
|
1 |
| Glossosomatidae |
Saddlecase Maker Caddisfly
|
1 |
| Tvetenia |
Non-Biting Midges
|
1 |
| Prostoia |
Spring Stonefly
|
1 |
| Paraphaenocladius |
Non-Biting Midges
|
1 |
| Rheotanytarsus |
Non-Biting Midges
|
1 |
| Clinocera |
Aquatic Dance Fly
|
1 |
| Neophylax |
Caddisfly
|
1 |
| Gomphidae |
Clubtail Dragonfly
|
1 |
| Simuliidae |
Black Fly
|
1 |
| Chimarra |
Fingernet Caddisfly
|
1 |
| Heptageniidae |
Flathead Mayfly
|
1 |
| Acroneuria |
Golden Stoneflies
|
1 |
| Maccaffertium |
March Brown And Cahill Mayfly
|
1 |
| Eurylophella |
Mayfly
|
1 |
| Eukiefferiella |
Non-Biting Midges
|
1 |
| Orthocladius |
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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