MBSS Site Summary for: GILB-201-X-2017

Site Photos

Field photo showing stream conditions at site GILB-201-X-2017-MidpointDownstream (Opens in a new window) Field photo showing stream conditions at site GILB-201-X-2017-MidpointUpstream (Opens in a new window)

Located on Trinity Church Run in the Gilbert Swamp watershed, 8-digit code: 02140107.
This stream was visited in the spring on 3/7/2017 and again in the summer on 6/12/2017.

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 - 3.7 / 5.0
Benthic IBI Fair - 3.9 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 5,392 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 6.8 %
Agricultural Land Use 42.4 %
Forested Land Use 46.6 %


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 12/20 (Suboptimal)
Velocity/Depth Diversity 12/20 (Suboptimal)
Pool Quality
Pool Extent = 64 meters 		12/20 (Suboptimal)
Riffle Quality
Riffle Extent = 15 meters 		12/20 (Suboptimal)
Shading 70 %
Embeddedness 75 %
The embeddedness, a measure of silt on the stream bottom, was 75%. This is relatively high, and may exclude some biota.


Stream Water Quality:
No water quality measurements available for this site.

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 9 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
American Eel 107
Tessellated Darter 32
Largemouth Bass 21
Eastern Mosquitofish 18
Redbreast Sunfish 11
Bluegill 8
Tadpole Madtom 4
Eastern Mudminnow 2
Margined Madtom 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Cope's Gray Treefrog
Upland Chorus Frog

Crayfish:
Cambarus diogenes
Orconectes limosus
Procambarus clarkii

Exotic Plants:
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
POLYPEDILUM Non-Biting Midges 65
PROSIMULIUM Black Fly 17
CHEUMATOPSYCHE Net-Spinning Caddisfly 9
ORTHOCLADIUS Non-Biting Midges 6
ORTHOCLADIINAE Midge 6
TUBIFICIDAE Aquatic Worm 4
RHEOTANYTARSUS Non-Biting Midges 4
EPHEMERELLA Sulphur Mayfly 3
NEOPOROUS Predaceous Diving Beetle 2
THIENEMANNIMYIA GROUP Non-Biting Midges 1
DIAMESINAE Non-Biting Midges 1
LABRUNDINIA Non-Biting Midges 1
NANOCLADIUS Non-Biting Midges 1
CNEPHIA Black Fly 1
GLYPTOTENDIPES 1
NEOPHYLAX Caddisfly 1
HEXATOMA Crane Fly 1
STROPHOPTERYX Early Brown Stonefly 1
OECETIS Long-Horned Caddisfly 1
ACERPENNA Tiny Blue-Winged Olive Mayflies 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.