MBSS Site Summary for: AA-N-030-223-95


Located on DEEP RUN UT1 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 7/24/1995.

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 - 3.7 / 5.0
Benthic IBI Good - 4.1 / 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 1,175 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 11.6 %
Agricultural Land Use 15.6 %
Forested Land Use 72.6 %


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

Physical Stream Habitat
Instream Habitat 17/20 (Optimal)
Epifaunal Substrate 13/20 (Suboptimal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = meters 		17/20 (Optimal)
Riffle Quality 7/20 (Marginal)
Shading 80 %
Embeddedness 25 %


Stream Water Quality:
Water temperature 21.8 ° C
Dissolved oxygen (DO) 7.7 mg/L
pH (lab) 7.08
Conductivity 200 µmho/cm
Alkalinity
(acid neutralizing capacity) 		385.4 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
Rosyside Dace 316
Blacknose Dace 159
Creek Chub 104
White Sucker 48
Green Sunfish 31
Tessellated Darter 30
Common Shiner 25
Least Brook Lamprey 25
Eastern Mudminnow 18
Fallfish 9
Longnose Dace 5
Pumpkinseed 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Fowler's Toad
Northern Green Frog
Queen Snake

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 Non-Biting Midges 21
Micropsectra Non-Biting Midges 15
Parametriocnemus Non-Biting Midges 10
Conchapelopia Non-Biting Midges 10
Hydropsyche Net-Spinning Caddisfly 4
Nigronia Megaloptera (Dark Fishfly) 4
Lype Net Tube Caddisfly 3
Cheumatopsyche Net-Spinning Caddisfly 3
Eurylophella Mayfly 3
Tipula Crane Fly 2
Diplectrona Net-Spinning Caddisfly 2
Hemerodromia Tiny Fly 2
Polypedilum Non-Biting Midges 1
Thienemanniella Non-Biting Midges 1
Limnephilidae Northern Casemaker Caddisfly 1
Amphinemura Spring Stonefly 1
Physa Air-Breathing Freshwater Snail 1
Chelifera Aquatic Dance Fly 1
Clinocera Aquatic Dance Fly 1
Diamesa Bloodworm 1
Antocha Crane Fly 1
Calopteryx Damselfly 1
Chironomus Non-Biting Midges 1
Cryptochironomus Non-Biting Midges 1
Dicrotendipes 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.