MBSS Site Summary for: WA-V-084-116-95


Located on LITTLE ANTIETAM CR UT2 in the Antietam Creek watershed, 8-digit code: 02140502.
This stream was visited in the spring on 3/2/1995 and again in the summer on 7/10/1995.

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 Fair - 3.5 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 429 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0.2 %
Agricultural Land Use 47.5 %
Forested Land Use 51 %


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

Physical Stream Habitat
Instream Habitat 10/20 (Marginal)
Epifaunal Substrate 1/20 (Poor)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = meters 		5/20 (Poor)
Riffle Quality 10/20 (Marginal)
Shading 95 %
Embeddedness 75 %
The embeddedness, a measure of silt on the stream bottom, was 75%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 19 ° C
Dissolved oxygen (DO) 8 mg/L
pH (lab) 7.31
Conductivity 115 µmho/cm
Alkalinity
(acid neutralizing capacity) 		530.8 µeq/L
Dissolved organic carbon (DOC) 2 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 4 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 48
Creek Chub 37
Fantail Darter 36
Bluegill 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Green Frog
Northern Red Salamander
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Parametriocnemus Non-Biting Midges 23
Heleniella European Non-Biting Midge 12
Micropsectra Non-Biting Midges 11
Bezzia Biting Midge 7
Neophylax Caddisfly 6
Eukiefferiella Non-Biting Midges 6
Paraleptophlebia Blue Quill Mayfly 5
Ephemerella Sulphur Mayfly 5
Amphinemura Spring Stonefly 4
Thienemannimyia Non-Biting Midges 4
Baetis Blue-Winged Olive Mayfly 4
Tipula Crane Fly 3
Chrysops Deerfly 3
Ceratopogon Biting Midge 3
Limnophila 3
Anchytarsus Beetle 3
Conchapelopia Non-Biting Midges 3
Allocapnia Small Winter Stonefly 3
Optioservus Riffle Beetle 2
Thienemanniella Non-Biting Midges 2
Nigronia Megaloptera (Dark Fishfly) 2
Stenonema Flatheaded Mayfly 2
Stenelmis Beetle 2
Prosimulium Black Fly 2
Rhyacophila Free-Living Caddisfly 1
Dicranota Hairy-Eyed Cranefly 1
Eurylophella Mayfly 1
Diplectrona Net-Spinning Caddisfly 1
Hydatophylax Northern Caddisfly 1
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.