MBSS Site Summary for: EVIT-204-R-2004


Located on ROCKY GAP RUN in the Evitts Creek watershed, 8-digit code: 02141002.
This stream was visited in the spring on 3/4/2004 and again in the summer on 6/28/2004.

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 - 2.5 / 5.0
Benthic IBI Poor - 1.8 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 5,781 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 6 %
Agricultural Land Use 10 %
Forested Land Use 80 %


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 8/20 (Marginal)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = 50 meters 		15/20 (Suboptimal)
Riffle Quality
Riffle Extent = 34 meters 		14/20 (Suboptimal)
Shading 90 %
Embeddedness 40 %


Stream Water Quality:
Water temperature 8 ° C
Dissolved oxygen (DO) 6.9 mg/L
pH (lab) 7.43
Conductivity 125 µmho/cm
Alkalinity
(acid neutralizing capacity) 		396.3 µeq/L
Dissolved organic carbon (DOC) 2.4 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 141
White Sucker 88
Creek Chub 21
Green Sunfish 9
Longnose Dace 4
Brown Trout 2
Blue Ridge Sculpin 1
Central Stoneroller 1
Pumpkinseed 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Parametriocnemus Non-Biting Midges 60
Thienemannimyia group Non-Biting Midges 10
Orthocladiinae Midge 9
Chaoborus 7
Simulium Black Fly 6
Diamesa Bloodworm 4
Neophylax Caddisfly 3
Hydropsyche Net-Spinning Caddisfly 2
Cardiocladius Non-Biting Midge 1
Diplocladius Non-Biting Midges 1
Orthocladius Non-Biting Midges 1
Lumbriculidae Worm 1
Caecidotea Isopod 1
Hydrobaenus Midge 1
Leuctra  Rolled-Winged Stonefly 1
Cheumatopsyche Net-Spinning 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.