MBSS Site Summary for: GWYN-112-R-2004

Site Photos

Field photo showing stream conditions at site GWYN-112-R-2004-109 (Opens in a new window)

Located on RED RUN UT 1 in the Gwynns Falls watershed, 8-digit code: 02130905.
This stream was visited in the spring on 3/17/2004 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 - 2.7 / 5.0
Benthic IBI Poor - 2.3 / 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 226 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 46 %
Agricultural Land Use 28 %
Forested Land Use 24 %


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

Physical Stream Habitat
Instream Habitat 13/20 (Suboptimal)
Epifaunal Substrate 14/20 (Suboptimal)
Velocity/Depth Diversity 9/20 (Marginal)
Pool Quality
Pool Extent = 52 meters 		9/20 (Marginal)
Riffle Quality
Riffle Extent = 23 meters 		10/20 (Marginal)
Shading 65 %
Embeddedness 40 %


Stream Water Quality:
Water temperature 19.6 ° C
Dissolved oxygen (DO) 7.9 mg/L
pH (lab) 7.34
Conductivity 231 µmho/cm
Alkalinity
(acid neutralizing capacity) 		961.3 µeq/L
Dissolved organic carbon (DOC) 1.8 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 135
Creek Chub 132
Green Sunfish 9
Rosyside Dace 5
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Box Turtle
Northern Green Frog
Northern Two-Lined Salamander
Northern Watersnake
Pickerel Frog
Wood Frog

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
Orthocladius Non-Biting Midges 32
Hydropsyche Net-Spinning Caddisfly 22
Cheumatopsyche Net-Spinning Caddisfly 16
Diamesa Bloodworm 12
Eukiefferiella Non-Biting Midges 12
Sympotthastia Non-Biting Midges 12
Limnephilidae Northern Casemaker Caddisfly 4
Thienemanniella Non-Biting Midges 2
Thienemannimyia group Non-Biting Midges 2
Tvetenia Non-Biting Midges 2
Parametriocnemus Non-Biting Midges 2
Tipula Crane Fly 2
Simulium Black Fly 2
Diplectrona Net-Spinning Caddisfly 2
Brillia Non-Biting Midges 1
Chelifera Aquatic Dance Fly 1
Chimarra Fingernet Caddisfly 1
Rheosmittia Non-Biting Midges 1
Microtendipes 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.