MBSS Site Summary for: PATL-256-T-2007

Site Photos

Field photo showing stream conditions at site PATL-256-T-2007-1 (Opens in a new window) Field photo showing stream conditions at site PATL-256-T-2007-2 (Opens in a new window)

Located on Deep Run UT1 in the Patapsco River L N Br watershed, 8-digit code: 02130906.
This stream was visited in the spring on 4/18/2007 and again in the summer on 6/12/2007.

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 Fair - 3.0 / 5.0
Benthic IBI Poor - 2.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 3,302 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 55.7 %
Agricultural Land Use 19.8 %
Forested Land Use 23.1 %


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

Physical Stream Habitat
Instream Habitat 6/20 (Marginal)
Epifaunal Substrate 8/20 (Marginal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = 57 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 18 meters 		7/20 (Marginal)
Shading 80 %
Embeddedness 50 %


Stream Water Quality:
Water temperature 21.6 ° C
Dissolved oxygen (DO) 9.03 mg/L
pH (lab) 7.56
Conductivity 470 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1157.6 µeq/L
Dissolved organic carbon (DOC) 2.5486 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 10 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Tessellated Darter 30
Eastern Mudminnow 25
Blacknose Dace 7
Blue Ridge Sculpin 7
Longnose Dace 6
White Sucker 6
American Eel 5
Creek Chub 4
Green Sunfish 3
Satinfin Shiner 2
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Fowler's Toad
Northern Green Frog
Northern Spring Peeper
Northern Two-Lined Salamander

Crayfish:
Orconectes limosus
Orconectes virilis

Exotic Plants:
Garlic Mustard
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
Tree Of Heaven
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Hydrobaenus Midge 44
Orthocladius Non-Biting Midges 19
Polypedilum Non-Biting Midges 10
Orthocladiinae Midge 9
Crangonyx Amphipod 5
Tvetenia Non-Biting Midges 5
Saetheria 3
Calopteryx Damselfly 3
Tanytarsus Non-Biting Midges 3
Enchytraeidae Aquatic Worm 2
Cheumatopsyche Net-Spinning Caddisfly 2
Ablabesmyia Non-Biting Midge 1
Stenelmis Beetle 1
Simulium Black Fly 1
Tipula Crane Fly 1
Tanypodinae Non-Biting Midges 1
Ironoquia Northern Caddisfly 1
Boyeria Spotted Darner Dragonfly 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.