MBSS Site Summary for: BA-P-025-102-96


Located on BEAVERDAM RUN in the Loch Raven Reservoir watershed, 8-digit code: 02130805.
This stream was visited in the spring on 4/16/1996 and again in the summer on 7/11/1996.

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 Fair - 3.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 605 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 42.5 %
Forested Land Use 56.7 %


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 15/20 (Suboptimal)
Velocity/Depth Diversity 15/20 (Suboptimal)
Pool Quality
Pool Extent = meters 		14/20 (Suboptimal)
Riffle Quality 14/20 (Suboptimal)
Shading 85 %
Embeddedness 30 %


Stream Water Quality:
Water temperature 15.1 ° C
Dissolved oxygen (DO) 12.6 mg/L
pH (lab) 6.37
Conductivity 71 µmho/cm
Alkalinity
(acid neutralizing capacity) 		180 µeq/L
Dissolved organic carbon (DOC) 4.9 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 8 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 60
Creek Chub 36
Brown Trout 20
Longnose Dace 17
Tessellated Darter 4
White Sucker 4
Cutlip Minnow 1
Rosyside Dace 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Two-Lined Salamander

Crayfish:
Cambarus bartonii bartonii
Orconectes virilis

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ephemerella Sulphur Mayfly 26
Parametriocnemus Non-Biting Midges 14
Simulium Black Fly 10
Diplectrona Net-Spinning Caddisfly 7
Stenonema Flatheaded Mayfly 6
Clioperla Green-Winged Stonefly 6
Cricotopus/Orthocladius Midge 4
Eurylophella Mayfly 3
Anchytarsus Beetle 2
Trissopelopia Non-Biting Midges 2
Prosimulium Black Fly 2
Oulimnius Riffle Beetle 1
Cheumatopsyche Net-Spinning Caddisfly 1
Conchapelopia Non-Biting Midges 1
Helichus Beetle 1
Diamesa Bloodworm 1
Dolophilodes Medium Evening Sedge Caddisfly 1
Rhyacophila Free-Living Caddisfly 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.