MBSS Site Summary for: GWYN-211-R-2004

Site Photos

Field photo showing stream conditions at site GWYN-211-R-2004-103 (Opens in a new window)

Located on DEAD RUN in the Gwynns Falls watershed, 8-digit code: 02130905.
This stream was visited in the spring on 3/16/2004 and again in the summer on 6/15/2004.

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 Poor - 2.0 / 5.0
Benthic IBI Poor - 1.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 4,692 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 86 %
Agricultural Land Use 4 %
Forested Land Use 10 %


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

Physical Stream Habitat
Instream Habitat 16/20 (Optimal)
Epifaunal Substrate 13/20 (Suboptimal)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = 75 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 4 meters 		4/20 (Poor)
Shading 65 %
Embeddedness 40 %


Stream Water Quality:
Water temperature 22.1 ° C
Dissolved oxygen (DO) 9.1 mg/L
pH (lab) 7.9
Conductivity 554 µmho/cm
Alkalinity
(acid neutralizing capacity) 		2296 µeq/L
Dissolved organic carbon (DOC) 3.9 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 6 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Fathead Minnow 71
Longnose Dace 21
White Sucker 21
Blacknose Dace 9
American Eel 3
Rainbow Trout 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Red-Backed Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cricotopus Non-Biting Midges 8
Thienemannimyia group Non-Biting Midges 5
Paratanytarsus Non-Biting Midges 2
Synurella Amphipod 1
Chelifera Aquatic Dance Fly 1
Enchytraeidae Aquatic Worm 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.