MBSS Site Summary for: AL-A-276-323-96


Located on EVITTS CR in the Evitts Creek watershed, 8-digit code: 02141002.
This stream was visited in the spring on 4/8/1996 and again in the summer on 8/8/1996.

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 - 3.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 44,108 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0.2 %
Agricultural Land Use 16.9 %
Forested Land Use 79.6 %


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 18/20 (Optimal)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = meters 		12/20 (Suboptimal)
Riffle Quality 15/20 (Suboptimal)
Shading 35 %
Embeddedness 25 %


Stream Water Quality:
Water temperature 22.5 ° C
Dissolved oxygen (DO) 8.7 mg/L
pH (lab) 8.04
Conductivity 162 µmho/cm
Alkalinity
(acid neutralizing capacity) 		922.3 µeq/L
Dissolved organic carbon (DOC) 2.7 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 17 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Central Stoneroller 1145
Blue Ridge Sculpin 909
Blacknose Dace 266
Longnose Dace 257
Fantail Darter 143
Potomac Sculpin 69
Greenside Darter 58
White Sucker 51
Creek Chub 24
Bluntnose Minnow 17
Fallfish 5
Northern Hogsucker 3
American Eel 1
Rainbow Trout 1
Rock Bass 1
Smallmouth Bass 1
Yellow Bullhead 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Amphinemura Spring Stonefly 19
Ephemerella Sulphur Mayfly 15
Prosimulium Black Fly 13
Acerpenna Tiny Blue-Winged Olive Mayflies 12
Cricotopus/Orthocladius Midge 6
Eukiefferiella Non-Biting Midges 5
Polypedilum Non-Biting Midges 5
Thienemanniella Non-Biting Midges 3
Isonychia Slate Drake Mayfly 3
Stenonema Flatheaded Mayfly 3
Chaoborus 3
Cheumatopsyche Net-Spinning Caddisfly 2
Hydropsyche Net-Spinning Caddisfly 2
Hemerodromia Tiny Fly 2
Rhyacophila Free-Living Caddisfly 1
Eurylophella Mayfly 1
Drunella Blue-Winged Olive Mayfly 1
Cinygmula Dark Red Quill 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.