MBSS Site Summary for: RKGR-104-R-2009
Located on UT Patuxent River in the Rocky Gorge Dam watershed,
8-digit code: 02131107.
This stream was visited in the spring on 3/5/2009 and again in the summer on 6/10/2009.
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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Poor - 2.3 / 5.0
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Benthic IBI
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Good - 4.0 / 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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169 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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12.3 %
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Agricultural Land Use
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73.5 %
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Forested Land Use
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13.2 %
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Stream Water Quality:
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| Water temperature |
19.2 ° C
|
| Dissolved oxygen (DO) |
7.1 mg/L
|
| pH (lab) |
7.36 |
| Conductivity |
220 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
534.5 µeq/L |
| Dissolved organic carbon (DOC) |
1.318 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 |
| Gray Treefrog |
| Northern Green Frog |
| Northern Two-Lined Salamander |
| Pickerel Frog |
| Cambarus bartonii bartonii |
| Orconectes virilis |
| Garlic Mustard |
| Japanese Barberry |
| Japanese Stiltgrass |
| Mile-A-Minute |
| Multiflora Rose |
| Oriental Bittersweet |
| Wineberry |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Maccaffertium |
March Brown And Cahill Mayfly
|
9 |
| Sympotthastia |
Non-Biting Midges
|
8 |
| Orthocladiinae |
Midge
|
7 |
| Prosimulium |
Black Fly
|
7 |
| Corynoneura |
Non-Biting Midges
|
6 |
| Diamesinae |
Non-Biting Midges
|
4 |
| Stegopterna |
Black Fly
|
4 |
| Tanypodinae |
Non-Biting Midges
|
4 |
| Tanytarsini |
Non-Biting Midges
|
4 |
| Micropsectra |
Non-Biting Midges
|
4 |
| Psephenus |
Water Penny
|
4 |
| Eukiefferiella |
Non-Biting Midges
|
3 |
| Zavrelimyia |
Non-Biting Midges
|
3 |
| Leptophlebiidae |
Pronggilled Mayfly
|
3 |
| Baetidae |
Small Minnow Mayfly
|
3 |
| Anchytarsus |
Beetle
|
3 |
| Lype |
Net Tube Caddisfly
|
3 |
| Dicrotendipes |
Non-Biting Midges
|
2 |
| Chimarra |
Fingernet Caddisfly
|
2 |
| Oulimnius |
Riffle Beetle
|
2 |
| Acerpenna |
Tiny Blue-Winged Olive Mayflies
|
2 |
| Eccoptura |
Yellow Stone Stonefly
|
2 |
| Microtendipes |
Non-Biting Midges
|
2 |
| Parametriocnemus |
Non-Biting Midges
|
2 |
| Thienemannimyia Group |
Non-Biting Midges
|
2 |
| Tribelos |
Non-Biting Midges
|
1 |
| Tvetenia |
Non-Biting Midges
|
1 |
| Polypedilum |
Non-Biting Midges
|
1 |
| Rheotanytarsus |
Non-Biting Midges
|
1 |
| Orthocladius |
Non-Biting Midges
|
1 |
| Capniidae |
Small Winter Stonefly
|
1 |
| Amphinemura |
Spring Stonefly
|
1 |
| Rhyacophila |
Free-Living Caddisfly
|
1 |
| Phryganeidae |
Giant Casemaker Caddisfly
|
1 |
| Sialis |
Alderfly
|
1 |
| Ameletus |
Combmouthed Minnow Mayfly
|
1 |
| Perlidae |
Common Stonefly
|
1 |
| Antocha |
Crane Fly
|
1 |
| Pseudolimnophila |
Crane Fly
|
1 |
| Empididae |
Dance Fly
|
1 |
| Hydropsyche |
Net-Spinning Caddisfly
|
1 |
| Chironominae |
Non-Biting Midge
|
1 |
| Stilocladius |
Midge
|
1 |
| Xylotopus |
Midge
|
1 |
| Nigronia |
Megaloptera (Dark Fishfly)
|
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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