MBSS Site Summary for: EVIT-311-R-2004


Located on EVITTS CR in the Evitts Creek watershed, 8-digit code: 02141002.
This stream was visited in the spring on 3/15/2004 and again in the summer on 8/23/2004.

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 Good - 4.7 / 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 49,288 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 6 %
Agricultural Land Use 14 %
Forested Land Use 78 %


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 17/20 (Optimal)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = 62 meters 		10/20 (Marginal)
Riffle Quality
Riffle Extent = 75 meters 		17/20 (Optimal)
Shading 75 %
Embeddedness 25 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 18.6 ° C
Dissolved oxygen (DO) 7.9 mg/L
pH (lab) 8.36
Conductivity 208 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1052 µeq/L
Dissolved organic carbon (DOC) 1.7 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 20 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blue Ridge Sculpin 655
Longnose Dace 284
Fantail Darter 127
Greenside Darter 81
Central Stoneroller 71
Blacknose Dace 54
Potomac Sculpin 33
Creek Chub 24
Northern Hogsucker 15
Rainbow Darter 12
Fallfish 5
Smallmouth Bass 4
White Sucker 4
Bluntnose Minnow 2
Rock Bass 2
American Eel 1
Bluegill 1
Brown Trout 1
Rosyface Shiner 1
Tessellated Darter 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ephemerella Sulphur Mayfly 25
Orthocladius Non-Biting Midges 24
Isonychia Slate Drake Mayfly 23
Hydropsyche Net-Spinning Caddisfly 6
Prosimulium Black Fly 5
Cheumatopsyche Net-Spinning Caddisfly 4
Allocapnia Small Winter Stonefly 4
Orthocladiinae Midge 3
Baetis Blue-Winged Olive Mayfly 3
Prostoia Spring Stonefly 2
Amphinemura Spring Stonefly 1
Parametriocnemus Non-Biting Midges 1
Thienemannimyia group Non-Biting Midges 1
Tvetenia Non-Biting Midges 1
Optioservus Riffle Beetle 1
Neophylax Caddisfly 1
Antocha Crane Fly 1
Girardia Freshwater Flatworm 1
Serratella Mayfly 1
Stenacron Mayfly 1
Stegopterna Black Fly 1
Lumbriculidae Worm 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.