MBSS Site Summary for: EVIT-208-B-2007

Site Photos

Field photo showing stream conditions at site EVIT-208-B-2007-1 (Opens in a new window) Field photo showing stream conditions at site EVIT-208-B-2007-2 (Opens in a new window)

Located on Rocky Gap Run in the Evitts Creek watershed, 8-digit code: 02141002.
This stream was visited in the spring on 4/2/2007 and again in the summer on 6/5/2007.

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 - 3.5 / 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 6,539 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 6 %
Agricultural Land Use 9.1 %
Forested Land Use 81.5 %


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

Physical Stream Habitat
Instream Habitat 18/20 (Optimal)
Epifaunal Substrate 18/20 (Optimal)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = 44 meters 		10/20 (Marginal)
Riffle Quality
Riffle Extent = 75 meters 		18/20 (Optimal)
Shading 90 %
Embeddedness 25 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 15.6 ° C
Dissolved oxygen (DO) 12.3 mg/L
pH (lab) 7.76
Conductivity 97 µmho/cm
Alkalinity
(acid neutralizing capacity) 		518.3 µeq/L
Dissolved organic carbon (DOC) 2.7104 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 3 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blue Ridge Sculpin 153
Blacknose Dace 66
Longnose Dace 7
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Dusky Salamander
Northern Slimy Salamander
Red-Spotted Newt

Crayfish:
Cambarus bartonii bartonii

Exotic Plants:
Garlic Mustard
Japanese Barberry
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Micropsectra Non-Biting Midges 35
Diamesa Bloodworm 25
Prosimulium Black Fly 15
Amphinemura Spring Stonefly 9
Ephemerella Sulphur Mayfly 6
Tanytarsini Non-Biting Midges 4
Sweltsa Stonefly 3
Orthocladius Non-Biting Midges 3
Pteronarcys Giant Stonefly 3
Diplectrona Net-Spinning Caddisfly 3
Perlodidae Perlodid Stonefly 2
Optioservus Riffle Beetle 2
Oulimnius Riffle Beetle 2
Baetidae Small Minnow Mayfly 1
Diamesinae Non-Biting Midges 1
Lepidostoma Little Brown Sedge Caddisfly 1
Paraleptophlebia Blue Quill Mayfly 1
Baetis Blue-Winged Olive Mayfly 1
Hexatoma Crane Fly 1
Heptageniidae Flathead Mayfly 1
Psychomyia Trumpet-Net 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.