MBSS Site Summary for: ANTI-101-N-2006


Located on Antietam Creek UT3 in the Antietam Creek watershed, 8-digit code: 02140502.
This stream was visited in the spring on 4/27/2006 and again in the summer on 7/20/2006.

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 N R
Benthic IBI Poor - 2.5 / 5.0

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.)
Catchment area No data available Cows standing in a stream at a site with high agricultural land use. Cows survey the sampling procedure at this extreme example of a highly agriculturalized site.
Urban Land Use No data available
Agricultural Land Use No data available
Forested Land Use No data available


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 11/20 (Suboptimal)
Velocity/Depth Diversity 9/20 (Marginal)
Pool Quality
Pool Extent = 33 meters 		10/20 (Marginal)
Riffle Quality
Riffle Extent = 63 meters 		12/20 (Suboptimal)
Shading 90 %
Embeddedness 55 %
The embeddedness, a measure of silt on the stream bottom, was 55%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 16 ° C
Dissolved oxygen (DO) 10.8 mg/L
pH (lab) 8.24
Conductivity 549 µmho/cm
Alkalinity
(acid neutralizing capacity) 		4651 µeq/L
Dissolved organic carbon (DOC) 7.688 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 81
White Sucker 3
Rainbow Trout 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Dusky Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Mile-A-Minute
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Gammarus Amphipod 92
Optioservus Riffle Beetle 27
Micropsectra Non-Biting Midges 4
Baetis Blue-Winged Olive Mayfly 2
Parametriocnemus Non-Biting Midges 2
Calopteryx Damselfly 1
Dixa 1
Trepobates 1
Orthocladius Non-Biting Midges 1
Ephemerella Sulphur Mayfly 1
Hemerodromia Tiny Fly 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.