MBSS Site Summary for: BA-P-057-209-96


Located on GREENE BR in the Loch Raven Reservoir watershed, 8-digit code: 02130805.
This stream was visited in the spring on 4/9/1996 and again in the summer on 6/18/1996.

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 Poor - 2.7 / 5.0
Benthic IBI Fair - 3.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 2,225 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 2.8 %
Agricultural Land Use 40.2 %
Forested Land Use 56.6 %


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

Physical Stream Habitat
Instream Habitat 10/20 (Marginal)
Epifaunal Substrate 10/20 (Marginal)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = meters 		7/20 (Marginal)
Riffle Quality 15/20 (Suboptimal)
Shading 60 %
Embeddedness 60 %
The embeddedness, a measure of silt on the stream bottom, was 60%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 20.5 ° C
Dissolved oxygen (DO) 9.1 mg/L
pH (lab) 7.43
Conductivity 182 µmho/cm
Alkalinity
(acid neutralizing capacity) 		488.5 µeq/L
Dissolved organic carbon (DOC) 1.4 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 9 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 60
Creek Chub 40
Bluegill 39
Rosyside Dace 36
Longnose Dace 33
Northern Hogsucker 15
White Sucker 12
Green Sunfish 2
Brown Trout 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Dusky Salamander

Crayfish:
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 23
Cricotopus/Orthocladius Midge 19
Orthocladiinae A Non-Biting Midges 19
Acroneuria Golden Stoneflies 5
Amphinemura Spring Stonefly 5
Orthocladius Non-Biting Midges 4
Hemerodromia Tiny Fly 3
Prosimulium Black Fly 2
Syndiamesa 2
Probezzia Biting Midges 1
Eurylophella Mayfly 1
Optioservus Riffle Beetle 1
Cheumatopsyche Net-Spinning Caddisfly 1
Hydropsyche Net-Spinning Caddisfly 1
Eccoptura Yellow Stone Stonefly 1
Prostoia Spring Stonefly 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.