MBSS Site Summary for: PATL-511-X-2012

Site Photos

Field photo showing stream conditions at site PATL-511-X-2012-1 (Opens in a new window) Field photo showing stream conditions at site PATL-511-X-2012-2 (Opens in a new window)

Located on PATAPSCO RIVER in the Patapsco River L N Br watershed, 8-digit code: 02130906.
This stream was visited in the spring on 3/27/2012 and again in the summer on 8/2/2012.

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 - 3.7 / 5.0
Benthic IBI Good - 4.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 166,012 acres Cows standing in a stream at a site with high agricultural land use. Cows survey the sampling procedure at this extreme example of a highly agriculturalized site.
Urban Land Use 16.3 %
Agricultural Land Use 42.9 %
Forested Land Use 36.8 %


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

Physical Stream Habitat

Instream Habitat 16/20 (Optimal)
Epifaunal Substrate 16/20 (Optimal)
Velocity/Depth Diversity 17/20 (Optimal)
Pool Quality
Pool Extent = 69 meters
15/20 (Suboptimal)
Riffle Quality
Riffle Extent = 61 meters
17/20 (Optimal)
Shading 55 %
Embeddedness 25 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:

pH (lab) 7.86
Alkalinity
(acid neutralizing capacity)
786.1 µeq/L
Dissolved organic carbon (DOC) 1.5582 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 25 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Redbreast Sunfish 174
American Eel 135
Spotfin Shiner 95
Blue Ridge Sculpin 65
Cutlip Minnow 51
Rock Bass 51
Smallmouth Bass 33
Tessellated Darter 25
Swallowtail Shiner 22
Margined Madtom 21
Bluntnose Minnow 20
White Sucker 11
Bluegill 9
Northern Hogsucker 9
Green Sunfish 8
Longnose Dace 8
River Chub 5
Spottail Shiner 4
Satinfin Shiner 3
Blacknose Dace 2
Central Stoneroller 1
Common Shiner 1
Creek Chub 1
Largemouth Bass 1
Yellow Bullhead 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:

American Bullfrog
Northern Green Frog
Northern Water Snake

Crayfish:

Orconectes virilis

Exotic Plants:

Garlic Mustard
Japanese Hops
Japanese Stiltgrass
Mile-A-Minute
Multiflora Rose
Oriental Bittersweet
Privet
Wavyleaf Basketgrass
Wineberry
 

Benthic Macroinvertebrates:

Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Chimarra Fingernet Caddisfly 19
Simulium Black Fly 16
Ephemerella Sulphur Mayfly 11
Orthocladius Non-Biting Midges 9
Perlesta 8
Rheotanytarsus Non-Biting Midges 7
Tanytarsus Non-Biting Midges 4
Lepidostoma Little Brown Sedge Caddisfly 4
Cricotopus Non-Biting Midges 4
Hydropsyche Net-Spinning Caddisfly 3
Maccaffertium March Brown And Cahill Mayfly 3
Orthocladiinae Midge 3
Polypedilum Non-Biting Midges 3
Oulimnius Riffle Beetle 2
Eukiefferiella Non-Biting Midges 2
Leptoxis Freshwater Snail 2
Antocha Crane Fly 1
Protoptila 1
Clinocera Aquatic Dance Fly 1
NAIDIDAE Aquatic Worm 1
Stenelmis Beetle 1
Prosimulium Black Fly 1
Corynoneura Non-Biting Midges 1
Cheumatopsyche Net-Spinning Caddisfly 1
Nigronia Megaloptera (Dark Fishfly) 1
Promoresia Riffle Beetle 1
LEUCTRIDAE Rolledwinged Stonefly 1
Ceraclea Scaly-Winged Sedge Caddisfly 1
Isonychia Slate Drake Mayfly 1
Amphinemura Spring Stonefly 1
Potthastia Non-Biting Midges 1
Micrasema 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.