MBSS Site Summary for: GWYN-104-R-2004

Site Photos

Field photo showing stream conditions at site GWYN-104-R-2004-104 (Opens in a new window) Field photo showing stream conditions at site GWYN-104-R-2004-105 (Opens in a new window)

Located on SCOTTS LEVEL BR 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 6/17/2004.

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 - 1.7 / 5.0
Benthic IBI Poor - 1.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 464 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 61 %
Agricultural Land Use 19 %
Forested Land Use 19 %


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

Physical Stream Habitat
Instream Habitat 14/20 (Suboptimal)
Epifaunal Substrate 15/20 (Suboptimal)
Velocity/Depth Diversity 8/20 (Marginal)
Pool Quality
Pool Extent = 15 meters 		9/20 (Marginal)
Riffle Quality
Riffle Extent = 60 meters 		13/20 (Suboptimal)
Shading 80 %
Embeddedness 25 %


Stream Water Quality:
Water temperature 20.4 ° C
Dissolved oxygen (DO) 7.5 mg/L
pH (lab) 7.42
Conductivity 932 µmho/cm
Alkalinity
(acid neutralizing capacity) 		778.9 µeq/L
Dissolved organic carbon (DOC) 5.1 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 5 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 116
Creek Chub 37
Redbreast Sunfish 23
Central Stoneroller 8
Longnose Dace 7
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Snapping Turtle
Northern Green Frog
Northern Two-Lined Salamander
Wood Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Garlic Mustard
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cricotopus Non-Biting Midges 57
Microtendipes Non-Biting Midges 12
Thienemannimyia group Non-Biting Midges 12
Hydropsyche Net-Spinning Caddisfly 11
Cheumatopsyche Net-Spinning Caddisfly 7
Antocha Crane Fly 7
Paratanytarsus Non-Biting Midges 6
Parametriocnemus Non-Biting Midges 5
Paraphaenocladius Non-Biting Midges 3
Tipula Crane Fly 2
Calopteryx Damselfly 1
Tabanidae Horse Fly 1
Orthocladiinae Midge 1
Ceratopogon Biting Midge 1
Eukiefferiella Non-Biting Midges 1
Orthocladius Non-Biting Midges 1
Rheosmittia Non-Biting Midges 1
Thienemanniella Non-Biting Midges 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.