MBSS Site Summary for: EVIT-203-B-2007

Site Photos

Field photo showing stream conditions at site EVIT-203-B-2007-1 (Opens in a new window) Field photo showing stream conditions at site EVIT-203-B-2007-2 (Opens in a new window)

Located on Elk Lick 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 Poor - 2.0 / 5.0
Benthic IBI Poor - 2.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
(Hint: Screen readers will announce definitions; mouse users can hover over dotted text.)
Catchment area 3,501 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 10.7 %
Agricultural Land Use 11.4 %
Forested Land Use 77.8 %


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

Physical Stream Habitat
Instream Habitat 16/20 (Optimal)
Epifaunal Substrate 16/20 (Optimal)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = 43 meters 		12/20 (Suboptimal)
Riffle Quality
Riffle Extent = 54 meters 		16/20 (Optimal)
Shading 60 %
Embeddedness 35 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 18.3 ° C
Dissolved oxygen (DO) 6.6 mg/L
pH (lab) 8.1
Conductivity 740 µmho/cm
Alkalinity
(acid neutralizing capacity) 		3819.2 µeq/L
Dissolved organic carbon (DOC) 1.5059 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 10 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 325
Fantail Darter 89
Central Stoneroller 69
Longnose Dace 38
Blue Ridge Sculpin 33
Potomac Sculpin 12
White Sucker 10
Rock Bass 5
Creek Chub 4
Bluntnose Minnow 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Dusky Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Garlic Mustard
Japanese Honeysuckle
Japanese Knotweed
Multiflora Rose
Tree Of Heaven
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Naididae Aquatic Worm 15
Cheumatopsyche Net-Spinning Caddisfly 14
Optioservus Riffle Beetle 3
Orthocladiinae Midge 3
Lumbriculidae Worm 2
Parametriocnemus Non-Biting Midges 2
Rheocricotopus Non-Biting Midges 2
Stenelmis Beetle 2
Simuliidae Black Fly 2
Diamesa Bloodworm 1
Isotomurus Elongate-Bodied Springtail 1
Chimarra Fingernet Caddisfly 1
Caenis Mayfly 1
Prosimulium Black Fly 1
Micropsectra Non-Biting Midges 1
Orthocladius Non-Biting Midges 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.