MBSS Site Summary for: GWYN-102-S-2010

Site Photos

Field photo showing stream conditions at site GWYN-102-S-2010-1 (Opens in a new window) Field photo showing stream conditions at site GWYN-102-S-2010-2 (Opens in a new window)

Located on UT to Red Run in the Gwynns Falls watershed, 8-digit code: 02130905.
This stream was visited in the spring on 3/8/2010 and again in the summer on 6/9/2010.

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 - 2.3 / 5.0
Benthic IBI Good - 4.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 179 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 7.1 %
Agricultural Land Use 15.9 %
Forested Land Use 63.2 %


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

Physical Stream Habitat
Instream Habitat 9/20 (Marginal)
Epifaunal Substrate 10/20 (Marginal)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = 34 meters 		8/20 (Marginal)
Riffle Quality
Riffle Extent = 43 meters 		7/20 (Marginal)
Shading 60 %
Embeddedness 5 %


Stream Water Quality:
pH (lab) 7.695
Alkalinity
(acid neutralizing capacity) 		823.4 µeq/L
Dissolved organic carbon (DOC) 3.0205 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 138
Rosyside Dace 45
Creek Chub 38
Green Sunfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog
Northern Two-Lined Salamander
Pickerel Frog
Wood Frog

Crayfish:
Cambarus bartonii bartonii

Exotic Plants:
Japanese Stiltgrass
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cheumatopsyche Net-Spinning Caddisfly 22
Chimarra Fingernet Caddisfly 15
Prosimulium Black Fly 12
Amphinemura Spring Stonefly 8
Parametriocnemus Non-Biting Midges 6
Baetidae Small Minnow Mayfly 5
Psephenus Water Penny 4
Diplectrona Net-Spinning Caddisfly 4
Caenis Mayfly 3
Acerpenna Tiny Blue-Winged Olive Mayflies 3
Polycentropus Tube Maker Caddisfly 2
Prostoia Spring Stonefly 2
Thienemannimyia Group Non-Biting Midges 2
Trissopelopia Non-Biting Midges 2
Eurylophella Mayfly 2
Nigronia Megaloptera (Dark Fishfly) 2
Argia Narrow-Winged Damselfly 2
Eukiefferiella Non-Biting Midges 2
Pseudolimnophila Crane Fly 2
Calopteryx Damselfly 1
Rhyacophila Free-Living Caddisfly 1
Dicranota Hairy-Eyed Cranefly 1
Neophylax Caddisfly 1
Stempellina 1
Stenelmis Beetle 1
Micropsectra Non-Biting Midges 1
Orthocladius Non-Biting Midges 1
Corynoneura Non-Biting Midges 1
Nemouridae Nemourid Stonefly 1
Tvetenia Non-Biting Midges 1
Sympotthastia Non-Biting Midges 1
Tanytarsus Non-Biting Midges 1
Collembola Springtail 1
Allocapnia Small Winter Stonefly 1
Hydrobius Water Scavenger Beetle 1
Eccoptura Yellow Stone Stonefly 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.