MBSS Site Summary for: GILB-121-R-2023

Site Photos

Field photo showing stream conditions at site GILB-121-R-2023_Midpoint_facing_downstream_ (Opens in a new window) Field photo showing stream conditions at site GILB-121-R-2023_Midpoint_facing_upstream_ (Opens in a new window)

Located on FORD RUN in the Gilbert Swamp watershed, 8-digit code: 02140107.
This stream was visited in the spring on 3/27/2023 and again in the summer on 6/8/2023.

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 Poor - 1.7 / 5.0
Benthic IBI Good - 4.4 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area No data available A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 19.1 %
Agricultural Land Use 1.9 %
Forested Land Use 78.8 %


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 3/20 (Poor)
Pool Quality
Pool Extent = 39 meters 		6/20 (Marginal)
Riffle Quality
Riffle Extent = 36 meters 		6/20 (Marginal)
Shading 90 %
Embeddedness 25 %


Stream Water Quality:
Water temperature 17.2 ° C
Dissolved oxygen (DO) 5.01 mg/L
pH (lab) 6.84
Alkalinity
(acid neutralizing capacity) 		169 µeq/L
Dissolved organic carbon (DOC) 2.385 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 1 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 100
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog
Pickerel Frog

Crayfish:
None observed

Exotic Plants:
Japanese Stiltgrass
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
AMPHINEMURA Spring Stonefly 26
HAPLOPERLA Green Stonefly 14
SIMULIUM Black Fly 10
POLYPEDILUM Non-Biting Midges 9
TANYTARSUS Non-Biting Midges 9
ZAVRELIMYIA Non-Biting Midges 6
EUKIEFFERIELLA Non-Biting Midges 6
PARAMETRIOCNEMUS Non-Biting Midges 5
ABLABESMYIA Non-Biting Midge 4
HYDROBAENUS Midge 3
BEZZIA/PALPOMYIA/PROBEZZIA 3
SYNURELLA Amphipod 3
EPHEMERELLA Sulphur Mayfly 3
ORTHOCLADIUS Non-Biting Midges 3
TRISSOPELOPIA Non-Biting Midges 2
NEOPHYLAX Caddisfly 2
DIPLOCLADIUS Non-Biting Midges 2
MICROPSECTRA Non-Biting Midges 2
PARAPHAENOCLADIUS Non-Biting Midges 1
PHAENOPSECTRA Non-Biting Midges 1
DIPLECTRONA Net-Spinning Caddisfly 1
STENOCHIRONOMUS European Non-Biting Midge 1
PTILOSTOMIS Giant Casemaker Caddisfly 1
TABANUS Biting Horsefly 1
CLIOPERLA Green-Winged Stonefly 1
DIPTERA True Fly 1
THIENEMANNIMYIA GROUP Non-Biting Midges 1
RHEOTANYTARSUS 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.