MBSS Site Summary for: PRUN-190-B-2012

Site Photos

Field photo showing stream conditions at site PRUN-190-B-2012-1 (Opens in a new window) Field photo showing stream conditions at site PRUN-190-B-2012-2 (Opens in a new window)

Located on MCMILLAN FORK in the Potomac River U N Branch watershed, 8-digit code: 02141005.
This stream was visited in the spring on 3/21/2012.

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 N R
Benthic IBI Fair - 3.8 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 1,536 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 2.8 %
Agricultural Land Use 12.9 %
Forested Land Use 80.6 %


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

Physical Stream Habitat
Instream Habitat not sampled
Epifaunal Substrate not sampled
Velocity/Depth Diversity not sampled
Pool Quality not sampled
Riffle Quality not sampled
Shading not sampled
Embeddedness not sampled


Stream Water Quality:
pH (lab) 7.66
Alkalinity
(acid neutralizing capacity) 		780.1 µeq/L
Dissolved organic carbon (DOC) 1.0314 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:
Fish data is unavailable or no fish observed.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
Cambarus bartonii bartonii

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Prosimulium Black Fly 30
Amphinemura Spring Stonefly 20
Baetis Blue-Winged Olive Mayfly 13
EPHEMERELLIDAE Spiny Crawler Mayfly 9
Isoperla Stripetail Stonefly 5
Leuctra  Rolled-Winged Stonefly 5
Epeorus Mayfly 5
Diplectrona Net-Spinning Caddisfly 4
Oulimnius Riffle Beetle 4
LEPTOPHLEBIIDAE Pronggilled Mayfly 3
Ephemerella Sulphur Mayfly 3
NEMOURIDAE Nemourid Stonefly 2
Hydropsyche Net-Spinning Caddisfly 2
Eukiefferiella Non-Biting Midges 2
Micropsectra Non-Biting Midges 2
Haploperla Green Stonefly 2
Dolophilodes Medium Evening Sedge Caddisfly 1
Neophylax Caddisfly 1
Pseudolimnophila Crane Fly 1
Heleniella European Non-Biting Midge 1
Tvetenia Non-Biting Midges 1
Tallaperla Roach-Like Stonefly 1
Polycentropus Tube Maker 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.