MBSS Site Summary for: LIGU-102-R-2001

Site Photos

Field photo showing stream conditions at site LIGU-102-R-2001-2 (Opens in a new window) Field photo showing stream conditions at site LIGU-102-R-2001-1 (Opens in a new window)

Located on OVERSHOT BR in the Little Gunpowder Falls watershed, 8-digit code: 02130804.
This stream was visited in the spring on 3/6/2001 and again in the summer on 6/11/2001.

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 - 4.0 / 5.0
Benthic IBI Fair - 3.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 1,047 acres Cows standing in a stream at a site with high agricultural land use. Cows survey the sampling procedure at this extreme example of a highly agriculturalized site.
Urban Land Use 13 %
Agricultural Land Use 55 %
Forested Land Use 29 %


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 15/20 (Suboptimal)
Pool Quality
Pool Extent = 23 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 55 meters 		15/20 (Suboptimal)
Shading 85 %
Embeddedness 15 %


Stream Water Quality:
Water temperature 14.6 ° C
Dissolved oxygen (DO) 9.4 mg/L
pH (lab) 7.28
Conductivity 140 µmho/cm
Alkalinity
(acid neutralizing capacity) 		267.7 µeq/L
Dissolved organic carbon (DOC) 1 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 11 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Rosyside Dace 112
Blacknose Dace 72
American Eel 33
Longnose Dace 30
Cutlip Minnow 13
Creek Chub 6
Tessellated Darter 6
River Chub 3
White Sucker 3
Common Shiner 2
Sea Lamprey 2
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern Box Turtle
Eastern Snapping Turtle
Long-Tailed Salamander
Northern Green Frog
Northern Two-Lined Salamander

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ephemerella Sulphur Mayfly 14
Cricotopus/Orthocladius Midge 11
Parametriocnemus Non-Biting Midges 11
Diamesa Bloodworm 6
Sympotthastia Non-Biting Midges 6
Cheumatopsyche Net-Spinning Caddisfly 5
Eurylophella Mayfly 4
Conchapelopia Non-Biting Midges 4
Rheosmittia Non-Biting Midges 4
Leuctridae Rolledwinged Stonefly 4
Dolophilodes Medium Evening Sedge Caddisfly 3
Polypedilum Non-Biting Midges 3
Hydropsyche Net-Spinning Caddisfly 2
Micropsectra Non-Biting Midges 2
Antocha Crane Fly 2
Prosimulium Black Fly 2
Acroneuria Golden Stoneflies 2
Stempellinella Non-Biting Midges 2
Perlodidae Perlodid Stonefly 2
Oulimnius Riffle Beetle 2
Thienemanniella Non-Biting Midges 2
Trissopelopia Non-Biting Midges 1
Tvetenia Non-Biting Midges 1
Polycentropodidae Trupetnet And Tubemaking Caddisfly 1
Rhyacophila Free-Living Caddisfly 1
Serratella Mayfly 1
Diplectrona Net-Spinning Caddisfly 1
Nanocladius Non-Biting Midges 1
Orthocladiinae A Non-Biting Midges 1
Brillia Non-Biting Midges 1
Potthastia 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.