MBSS Site Summary for: ANTI-101-X-2015


Located on MT AETNA CREEK in the Antietam Creek watershed, 8-digit code: 02140502.
This stream was visited in the spring on 4/8/2015 and again in the summer on 7/22/2015.

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.
Fish IBI Good - 4.7 / 5.0
Benthic IBI Poor - 2.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 2,338 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 6.9 %
Agricultural Land Use 9.6 %
Forested Land Use 83.3 %


Stream showing woody debris, logs, and rocky substrate.
An example of woody debris in a stream.

Physical Stream Habitat
Instream Habitat 12/20 (Suboptimal)
Epifaunal Substrate 18/20 (Optimal)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = 10 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 69 meters 		17/20 (Optimal)
Shading 15 %
Embeddedness 40 %


Stream Water Quality:
pH (lab) 7.82
Alkalinity
(acid neutralizing capacity) 		2340.3 µeq/L
Dissolved organic carbon (DOC) 1.0845 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. 		Close-up of a mayfly indicator species.

Fish Survey Results:
The following 3 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 181
Brown Trout 44
Longnose Dace 19
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
Cambarus bartonii bartonii
Orconectes virilis

Exotic Plants:
Multiflora Rose
Shrub Honeysuckle
Tree Of Heaven
Wineberry
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ephemerella Sulphur Mayfly 37
Gammarus Amphipod 16
Baetis Blue-Winged Olive Mayfly 16
Cheumatopsyche Net-Spinning Caddisfly 15
Optioservus Riffle Beetle 10
Antocha Crane Fly 10
Hydropsyche Net-Spinning Caddisfly 7
Parametriocnemus Non-Biting Midges 3
Simulium Black Fly 3
Isoperla Stripetail Stonefly 2
Kick net sampling for macroinvertebrates.
Sampling with a kick net.

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.