MBSS Site Summary for: GILB-101-X-2016

Site Photos

Field photo showing stream conditions at site GILB-101-X-2016-MidpointDownstream (Opens in a new window) Field photo showing stream conditions at site GILB-101-X-2016-MidpointUpstream (Opens in a new window)

Located on Hell's Bottom Run in the Gilbert Swamp watershed, 8-digit code: 02140107.
This stream was visited in the spring on 3/29/2016 and again in the summer on 6/15/2016.

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 - 3.3 / 5.0
Benthic IBI Good - 4.4 / 5.0

Land Use

Land use can provide important information for determining stream health.
(Hint: Screen readers will announce definitions; mouse users can hover over dotted text.)
Catchment area 992 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 14.2 %
Agricultural Land Use 31.6 %
Forested Land Use 53.6 %


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

Physical Stream Habitat
Instream Habitat 10/20 (Marginal)
Epifaunal Substrate 11/20 (Suboptimal)
Velocity/Depth Diversity 8/20 (Marginal)
Pool Quality
Pool Extent = 34 meters 		7/20 (Marginal)
Riffle Quality
Riffle Extent = 41 meters 		12/20 (Suboptimal)
Shading 90 %
Embeddedness 55 %
The embeddedness, a measure of silt on the stream bottom, was 55%. 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 5 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 147
Least Brook Lamprey 34
Rosyside Dace 11
Eastern Mudminnow 4
American Eel 2
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Cope's Gray Treefrog
Northern Green Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Hydrobaenus Midge 47
Haploperla Green Stonefly 20
Ephemerella Sulphur Mayfly 17
Orthocladius Non-Biting Midges 10
Hexatoma Crane Fly 5
Orthocladiinae Midge 3
Acerpenna Tiny Blue-Winged Olive Mayflies 3
Tanytarsus Non-Biting Midges 3
Amphinemura Spring Stonefly 3
Lumbriculidae Worm 1
Diplectrona Net-Spinning Caddisfly 1
Parametriocnemus Non-Biting Midges 1
Polypedilum Non-Biting Midges 1
Tipula Crane Fly 1
Saetheria 1
Neophylax Caddisfly 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.