MBSS Site Summary for: HO-N-018-213-95


Located on DEEP RUN in the Patapsco River L N Br watershed, 8-digit code: 02130906.
This stream was visited in the spring on 3/23/1995 and again in the summer on 7/6/1995.

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 Fair - 3.3 / 5.0
Benthic IBI Poor - 1.0 / 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 2,755 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 28.8 %
Agricultural Land Use 41.9 %
Forested Land Use 28 %


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

Physical Stream Habitat
Instream Habitat 15/20 (Suboptimal)
Epifaunal Substrate 15/20 (Suboptimal)
Velocity/Depth Diversity 13/20 (Suboptimal)
Pool Quality
Pool Extent = meters 		13/20 (Suboptimal)
Riffle Quality 16/20 (Optimal)
Shading 75 %
Embeddedness 10 %


Stream Water Quality:
Water temperature 21.2 ° C
Dissolved oxygen (DO) 8.3 mg/L
pH (lab) 8.12
Conductivity 324 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1478 µeq/L
Dissolved organic carbon (DOC) 3 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 12 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 202
Creek Chub 96
Blue Ridge Sculpin 72
Tessellated Darter 32
White Sucker 25
Rosyside Dace 17
Longnose Dace 15
Green Sunfish 7
Cutlip Minnow 6
Swallowtail Shiner 5
Common Shiner 2
Redbreast Sunfish 2
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Eastern Box Turtle

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 80
Diamesa Bloodworm 3
Hemerodromia Tiny Fly 3
Optioservus Riffle Beetle 2
Clinocera Aquatic Dance Fly 2
Stenelmis Beetle 1
Physa Air-Breathing Freshwater Snail 1
Chelifera Aquatic Dance Fly 1
Parakiefferiella European Non-Biting Midge 1
Conchapelopia Non-Biting Midges 1
Thienemanniella 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.