MBSS Site Summary for: PATL-112-X-2016

Site Photos

Field photo showing stream conditions at site PATL-112-X-2016_midpoint looking downstream (Opens in a new window) Field photo showing stream conditions at site PATL-112-X-2016_midpoint looking upstream (Opens in a new window)

Located on Davis Branch in the Patapsco River L N Br watershed, 8-digit code: 02130906.
This stream was visited in the spring on 3/9/2016 and again in the summer on 6/8/2016.

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 - 4.7 / 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 1,094 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 39.6 %
Agricultural Land Use 36.2 %
Forested Land Use 23.4 %


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 14/20 (Suboptimal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = 8 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 67 meters 		14/20 (Suboptimal)
Shading 85 %
Embeddedness 40 %


Stream Water Quality:
No water quality measurements available for this site.

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
Blue Ridge Sculpin 589
Blacknose Dace 129
Longnose Dace 73
American Eel 5
Cutlip Minnow 5
White Sucker 3
Creek Chub 2
Fathead Minnow 1
Rosyside Dace 1
Tessellated Darter 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Fowler's Toad
Wood Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Garlic Mustard
Japanese Barberry
Japanese Honeysuckle
Japanese Stiltgrass
Mile-A-Minute
Multiflora Rose
Poison Hemlock
Wavyleaf Basketgrass
Wineberry
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cheumatopsyche Net-Spinning Caddisfly 29
Orthocladius Non-Biting Midges 26
Antocha Crane Fly 19
Neophylax Caddisfly 10
Hydropsyche Net-Spinning Caddisfly 10
Chimarra Fingernet Caddisfly 5
Tipula Crane Fly 3
Orthocladiinae Midge 3
Sympotthastia Non-Biting Midges 3
Thienemannimyia Group Non-Biting Midges 2
Tvetenia Non-Biting Midges 1
Optioservus Riffle Beetle 1
Ephemerella Sulphur Mayfly 1
Lumbriculidae Worm 1
Thienemanniella Non-Biting Midges 1
Eukiefferiella Non-Biting Midges 1
Microtendipes Non-Biting Midges 1
Stenelmis Beetle 1
Simulium Black Fly 1
Dicranota Hairy-Eyed Cranefly 1
Glossosoma Little Black Caddisfly 1
Maccaffertium March Brown And Cahill Mayfly 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.