MBSS Site Summary for: CR-P-152-318-95


Located on N BR PATAPSCO R in the Liberty Reservoir watershed, 8-digit code: 02130907.
This stream was visited in the spring on 3/6/1995 and again in the summer on 8/1/1995.

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 Fair - 3.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
(Hint: Screen readers will announce definitions; mouse users can hover over dotted text.)
Catchment area 32,299 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 2.1 %
Agricultural Land Use 72.5 %
Forested Land Use 24.9 %


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

Physical Stream Habitat
Instream Habitat 14/20 (Suboptimal)
Epifaunal Substrate 15/20 (Suboptimal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = meters 		16/20 (Optimal)
Riffle Quality 18/20 (Optimal)
Shading 40 %
Embeddedness 50 %


Stream Water Quality:
Water temperature 22.2 ° C
Dissolved oxygen (DO) 8.1 mg/L
pH (lab) 7.46
Conductivity 204 µmho/cm
Alkalinity
(acid neutralizing capacity) 		635.4 µeq/L
Dissolved organic carbon (DOC) 1 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 19 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blue Ridge Sculpin 179
Central Stoneroller 63
Northern Hogsucker 50
Longnose Dace 38
Bluegill 34
Largemouth Bass 16
Tessellated Darter 14
Blacknose Dace 12
Cutlip Minnow 12
Margined Madtom 12
River Chub 12
Redbreast Sunfish 7
White Sucker 6
Green Sunfish 4
Spottail Shiner 3
Yellow Bullhead 3
Common Shiner 2
Common Carp 1
Rosyside Dace 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Watersnake
Pickerel Frog

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cricotopus/Orthocladius Midge 30
Hydropsyche Net-Spinning Caddisfly 23
Antocha Crane Fly 11
Cricotopus Non-Biting Midges 10
Ephemerella Sulphur Mayfly 10
Isonychia Slate Drake Mayfly 7
Prostoma Freshwater Nemertean (Ribbon Worm) 3
Cheumatopsyche Net-Spinning Caddisfly 2
Stenonema Flatheaded Mayfly 2
Clinocera Aquatic Dance Fly 2
Ferrissia Small Air-Breathing Freshwater Limpets 2
Hemerodromia Tiny Fly 2
Conchapelopia Non-Biting Midges 2
Optioservus Riffle Beetle 1
Psephenus Water Penny 1
Chelifera Aquatic Dance Fly 1
Acroneuria Golden Stoneflies 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.