MBSS Site Summary for: GILB-306-R-2001

Site Photos

Field photo showing stream conditions at site GILB-306-R-2001-36 (Opens in a new window) Field photo showing stream conditions at site GILB-306-R-2001-37 (Opens in a new window) Field photo showing stream conditions at site GILB-306-R-2001-38 (Opens in a new window) Field photo showing stream conditions at site GILB-306-R-2001-39 (Opens in a new window)

Located on GILBERT SWAMP RUN in the Gilbert Swamp watershed, 8-digit code: 02140107.
This stream was visited in the spring on 3/7/2001 and again in the summer on 6/4/2001.

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 Fair - 3.0 / 5.0
Benthic IBI Fair - 3.6 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 21,249 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 5 %
Agricultural Land Use 38 %
Forested Land Use 56 %


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

Physical Stream Habitat
Instream Habitat 8/20 (Marginal)
Epifaunal Substrate 10/20 (Marginal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = 10 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 75 meters 		18/20 (Optimal)
Shading 85 %
Embeddedness 35 %


Stream Water Quality:
Water temperature 17.5 ° C
Dissolved oxygen (DO) 9.4 mg/L
pH (lab) 6.92
Conductivity 90 µmho/cm
Alkalinity
(acid neutralizing capacity) 		192.6 µeq/L
Dissolved organic carbon (DOC) 3.5 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
Margined Madtom 28
Swallowtail Shiner 23
American Eel 20
Tessellated Darter 13
Bluegill 9
Satinfin Shiner 8
Fallfish 3
Pumpkinseed 2
Redbreast Sunfish 1
Spottail Shiner 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Pickerel Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Prosimulium Black Fly 69
Strophopteryx Early Brown Stonefly 9
Rheosmittia Non-Biting Midges 7
Cheumatopsyche Net-Spinning Caddisfly 6
Perlodidae Perlodid Stonefly 5
Ephemerella Sulphur Mayfly 5
Stenelmis Beetle 4
Psephenus Water Penny 3
Hydropsyche Net-Spinning Caddisfly 2
Microtendipes Non-Biting Midges 2
Oulimnius Riffle Beetle 2
Prostoia Spring Stonefly 1
Optioservus Riffle Beetle 1
Tanypodinae Non-Biting Midges 1
Chloroperlidae Green Stonefly 1
Hirudinea Leech 1
Polypedilum Non-Biting Midges 1
Probezzia Biting Midges 1
Antocha Crane Fly 1
Hemerodromia Tiny Fly 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.