MBSS Site Summary for: EVIT-112-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 Fair - 3.0 / 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 3,344 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 3 %
Agricultural Land Use 9 %
Forested Land Use 88 %


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

Physical Stream Habitat
Instream Habitat 11/20 (Suboptimal)
Epifaunal Substrate 7/20 (Marginal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = 62 meters 		16/20 (Optimal)
Riffle Quality
Riffle Extent = 17 meters 		7/20 (Marginal)
Shading 85 %
Embeddedness 30 %


Stream Water Quality:
Water temperature 16.8 ° C
Dissolved oxygen (DO) 7.5 mg/L
pH (lab) 7.17
Conductivity 157 µmho/cm
Alkalinity
(acid neutralizing capacity) 		287.9 µeq/L
Dissolved organic carbon (DOC) 3.2 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 13 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blue Ridge Sculpin 67
Blacknose Dace 30
White Sucker 22
Bluegill 21
Rosyside Dace 18
Creek Chub 14
Yellow Bullhead 12
Fantail Darter 7
Green Sunfish 7
Bluntnose Minnow 3
Central Stoneroller 3
Largemouth Bass 3
Pumpkinseed 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Dusky Salamander
Northern Two-Lined Salamander
Pickerel Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Chimarra Fingernet Caddisfly 15
Parachaetocladius Non-Biting Midge 14
Parametriocnemus Non-Biting Midges 7
Stenonema Flatheaded Mayfly 7
Neophylax Caddisfly 7
Acroneuria Golden Stoneflies 6
Leuctra  Rolled-Winged Stonefly 5
Nigronia Megaloptera (Dark Fishfly) 4
Allocapnia Small Winter Stonefly 4
Polycentropus Tube Maker Caddisfly 4
Cheumatopsyche Net-Spinning Caddisfly 4
Nemouridae Nemourid Stonefly 3
Gomphidae Clubtail Dragonfly 3
Tipula Crane Fly 2
Chloroperlidae Green Stonefly 2
Hydropsyche Net-Spinning Caddisfly 1
Nanocladius Non-Biting Midges 1
Taeniopteryx Winter Stonefly 1
Tanytarsus Non-Biting Midges 1
Strophopteryx Early Brown Stonefly 1
Pycnopsyche Great Autumn Brown Sedge Caddisfly 1
Antocha Crane Fly 1
Pseudolimnophila Crane Fly 1
Sialis Alderfly 1
Anchytarsus Beetle 1
Simulium Black Fly 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.