MBSS Site Summary for: CATO-115-R-2009
Located on Lewis Mill Run in the Catoctin Creek watershed,
8-digit code: 02140305.
This stream was visited in the spring on 4/14/2009 and again in the summer on 6/29/2009.
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 - 3.3 / 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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1,107 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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6 %
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Agricultural Land Use
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76.9 %
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Forested Land Use
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17 %
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Stream Water Quality:
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| Water temperature |
17.2 ° C
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| Dissolved oxygen (DO) |
10.2 mg/L
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| pH (lab) |
7.77 |
| Conductivity |
280 µmho/cm
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Alkalinity
(acid neutralizing capacity)
|
1069 µeq/L |
| Dissolved organic carbon (DOC) |
0.5621 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 Two-Lined Salamander |
| Pickerel Frog |
| Cambarus bartonii bartonii |
| Orconectes virilis |
| Garlic Mustard |
| Japanese Honeysuckle |
| Japanese Stiltgrass |
| Multiflora Rose |
| Shrub Honeysuckle |
| Wineberry |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Ephemerella |
Sulphur Mayfly
|
25 |
| Rheocricotopus |
Non-Biting Midges
|
14 |
| Cheumatopsyche |
Net-Spinning Caddisfly
|
12 |
| Micropsectra |
Non-Biting Midges
|
9 |
| Maccaffertium |
March Brown And Cahill Mayfly
|
9 |
| Diphetor |
Mayfly
|
8 |
| Polypedilum |
Non-Biting Midges
|
8 |
| Amphinemura |
Spring Stonefly
|
7 |
| Thienemannimyia Group |
Non-Biting Midges
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4 |
| Cricotopus |
Non-Biting Midges
|
4 |
| Trissopelopia |
Non-Biting Midges
|
3 |
| Leptophlebiidae |
Pronggilled Mayfly
|
3 |
| Tanytarsus |
Non-Biting Midges
|
3 |
| Optioservus |
Riffle Beetle
|
2 |
| Rhyacophila |
Free-Living Caddisfly
|
2 |
| Orthocladius |
Non-Biting Midges
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2 |
| Parametriocnemus |
Non-Biting Midges
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2 |
| Eurylophella |
Mayfly
|
2 |
| Orthocladiinae |
Midge
|
2 |
| Naididae |
Aquatic Worm
|
2 |
| Stenelmis |
Beetle
|
1 |
| Baetis |
Blue-Winged Olive Mayfly
|
1 |
| Neophylax |
Caddisfly
|
1 |
| Dugesiidae |
Flatworm
|
1 |
| Microtendipes |
Non-Biting Midges
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1 |
| Zavrelimyia |
Non-Biting Midges
|
1 |
| Rheotanytarsus |
Non-Biting Midges
|
1 |
| Stempellinella |
Non-Biting Midges
|
1 |
| Tanypodinae |
Non-Biting Midges
|
1 |
| Polycentropus |
Tube Maker Caddisfly
|
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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