MBSS Site Summary for: PATL-357-T-2007

Site Photos

Field photo showing stream conditions at site PATL-357-T-2007-1 (Opens in a new window) Field photo showing stream conditions at site PATL-357-T-2007-2 (Opens in a new window)

Located on Deep Run 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 Good - 4.0 / 5.0
Benthic IBI Poor - 1.6 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 8,131 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 41.6 %
Agricultural Land Use 14.2 %
Forested Land Use 42 %


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

Physical Stream Habitat
Instream Habitat 12/20 (Suboptimal)
Epifaunal Substrate 13/20 (Suboptimal)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = 75 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 0 meters 		0/20 (Poor)
Shading 85 %
Embeddedness 15 %


Stream Water Quality:
Water temperature 19.9 ° C
Dissolved oxygen (DO) 6.9 mg/L
pH (lab) 7.38
Conductivity 533 µmho/cm
Alkalinity
(acid neutralizing capacity) 		877.5 µeq/L
Dissolved organic carbon (DOC) 2.819 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 14 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Tessellated Darter 79
American Eel 39
White Sucker 29
Satinfin Shiner 19
Blue Ridge Sculpin 17
Fallfish 17
Swallowtail Shiner 7
Green Sunfish 3
Northern Hogsucker 3
Creek Chub 2
Sea Lamprey 2
Bluntnose Minnow 1
Longnose Dace 1
Redbreast Sunfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

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

Crayfish:
Orconectes limosus
Orconectes virilis

Exotic Plants:
Garlic Mustard
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
Shrub Honeysuckle
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Hydrobaenus Midge 40
Orthocladius Non-Biting Midges 33
Orthocladiinae Midge 12
Rheocricotopus Non-Biting Midges 5
Chaetocladius Non-Biting Midges 5
Polypedilum Non-Biting Midges 3
Cheumatopsyche Net-Spinning Caddisfly 2
Stegopterna Black Fly 2
Diamesa Bloodworm 1
Argia Narrow-Winged Damselfly 1
Ablabesmyia Non-Biting Midge 1
Tanytarsus Non-Biting Midges 1
Thienemannimyia group 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.