MBSS Site Summary for: EVIT-306-B-2007

Site Photos

Field photo showing stream conditions at site EVIT-306-B-2007-1 (Opens in a new window) Field photo showing stream conditions at site EVIT-306-B-2007-2 (Opens in a new window)

Located on Evitts Creek 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 7/23/2007.

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 - 3.7 / 5.0
Benthic IBI Fair - 3.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 35,914 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 5.4 %
Agricultural Land Use 13.8 %
Forested Land Use 78.9 %


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

Physical Stream Habitat
Instream Habitat 17/20 (Optimal)
Epifaunal Substrate 16/20 (Optimal)
Velocity/Depth Diversity 14/20 (Suboptimal)
Pool Quality
Pool Extent = 57 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 54 meters 		18/20 (Optimal)
Shading 35 %
Embeddedness 25 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 21.3 ° C
Dissolved oxygen (DO) 9.6 mg/L
pH (lab) 7.99
Conductivity 194 µmho/cm
Alkalinity
(acid neutralizing capacity) 		865.9 µeq/L
Dissolved organic carbon (DOC) 2.6328 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 12 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 2149
Blue Ridge Sculpin 668
Fantail Darter 458
Central Stoneroller 369
Longnose Dace 360
Potomac Sculpin 112
Bluntnose Minnow 51
Rainbow Darter 25
Greenside Darter 14
Creek Chub 9
Rock Bass 6
White Sucker 4
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Dusky Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Barberry
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Amphinemura Spring Stonefly 26
Ephemerella Sulphur Mayfly 20
Orthocladius Non-Biting Midges 16
Diamesa Bloodworm 8
Cheumatopsyche Net-Spinning Caddisfly 7
Isonychia Slate Drake Mayfly 7
Paraphaenocladius Non-Biting Midges 4
Serratella Mayfly 3
Thienemanniella Non-Biting Midges 3
Oulimnius Riffle Beetle 2
Orthocladiinae Midge 2
Parakiefferiella European Non-Biting Midge 2
Rheocricotopus Non-Biting Midges 2
Baetis Blue-Winged Olive Mayfly 2
Clinocera Aquatic Dance Fly 2
Prosimulium Black Fly 2
Simulium Black Fly 1
Naididae Aquatic Worm 1
Perlidae Common Stonefly 1
Antocha Crane Fly 1
Stempellinella Non-Biting Midges 1
Polypedilum Non-Biting Midges 1
Chimarra Fingernet Caddisfly 1
Epeorus Mayfly 1
Baetidae Small Minnow Mayfly 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.