MBSS Site Summary for: GILB-112-R-2015


Located on FORD RUN in the Gilbert Swamp watershed, 8-digit code: 02140107.
This stream was visited in the spring on 3/9/2015 and again in the summer on 6/9/2015.

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 - 4.1 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 139 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 23.5 %
Agricultural Land Use 0 %
Forested Land Use 76.5 %


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

Physical Stream Habitat
Instream Habitat 12/20 (Suboptimal)
Epifaunal Substrate 17/20 (Optimal)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = 36 meters 		8/20 (Marginal)
Riffle Quality
Riffle Extent = 40 meters 		10/20 (Marginal)
Shading 85 %
Embeddedness 70 %
The embeddedness, a measure of silt on the stream bottom, was 70%. This is relatively high, and may exclude some biota.


Stream Water Quality:
pH (lab) 6.53
Alkalinity
(acid neutralizing capacity) 		105.6 µeq/L
Dissolved organic carbon (DOC) 2.7174 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 3 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 60
American Eel 1
Eastern Mudminnow 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Eastern American Toad
Northern Green Frog
Pickerel Frog

Crayfish:
Cambarus diogenes

Exotic Plants:
No Exotic Plants Observed
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Nemouridae Nemourid Stonefly 17
Capniidae Small Winter Stonefly 17
Chrysops Deerfly 9
Stegopterna Black Fly 7
Synurella Amphipod 6
Caecidotea Isopod 6
Hydrobaenus Midge 4
Leuctra  Rolled-Winged Stonefly 4
Tipula Crane Fly 4
Neophylax Caddisfly 3
Mesocricotopus 3
Prosimulium Black Fly 3
Orthocladiinae Midge 3
Thienemannimyia Group Non-Biting Midges 3
Zavrelimyia Non-Biting Midges 3
Limnephilidae Northern Casemaker Caddisfly 3
Neoporous Predaceous Diving Beetle 3
Tanypodinae Non-Biting Midges 2
Stenelmis Beetle 2
Ceratopogonidae Biting Midge 2
Crangonyx Amphipod 2
Tubificidae Aquatic Worm 2
Hexatoma Crane Fly 2
Erioptera Cranefly 1
Heterotrissocladius European Non-Biting Midge 1
Ptilostomis Giant Casemaker Caddisfly 1
Siphlonurus Gray Drake Mayfly 1
Helichus Beetle 1
Cordulegaster Spiketail Dragonfly 1
Amphinemura Spring Stonefly 1
Isoperla Stripetail Stonefly 1
Paraphaenocladius 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.