MBSS Site Summary for: GILB-101-R-2001

Site Photos

Field photo showing stream conditions at site GILB-101-R-2001-12 (Opens in a new window) Field photo showing stream conditions at site GILB-101-R-2001-13 (Opens in a new window) Field photo showing stream conditions at site GILB-101-R-2001-14 (Opens in a new window) Field photo showing stream conditions at site GILB-101-R-2001-15 (Opens in a new window)

Located on LANCASTER RUN in the Gilbert Swamp watershed, 8-digit code: 02140107.
This stream was visited in the spring on 3/1/2001 and again in the summer on 6/12/2001.

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 Good - 4.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 506 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 15 %
Agricultural Land Use 39 %
Forested Land Use 44 %


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

Physical Stream Habitat
Instream Habitat 15/20 (Suboptimal)
Epifaunal Substrate 15/20 (Suboptimal)
Velocity/Depth Diversity 13/20 (Suboptimal)
Pool Quality
Pool Extent = 35 meters 		15/20 (Suboptimal)
Riffle Quality
Riffle Extent = 45 meters 		9/20 (Marginal)
Shading 70 %
Embeddedness 10 %


Stream Water Quality:
Water temperature 21.4 ° C
Dissolved oxygen (DO) 7.6 mg/L
pH (lab) 6.64
Conductivity 80 µmho/cm
Alkalinity
(acid neutralizing capacity) 		171.2 µeq/L
Dissolved organic carbon (DOC) 1.9 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 5 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 396
Least Brook Lamprey 15
Tessellated Darter 10
Bluegill 4
American Eel 3
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Fowler's Toad
Northern Green Frog
Northern Two-Lined Salamander
Wood Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Cricotopus/Orthocladius Midge 21
Acerpenna Tiny Blue-Winged Olive Mayflies 18
Parametriocnemus Non-Biting Midges 17
Chloroperlidae Green Stonefly 6
Ephemerella Sulphur Mayfly 6
Prosimulium Black Fly 5
Oulimnius Riffle Beetle 4
Thienemanniella Non-Biting Midges 3
Micropsectra Non-Biting Midges 3
Microtendipes Non-Biting Midges 2
Polypedilum Non-Biting Midges 2
Eccoptura Yellow Stone Stonefly 2
Crangonyctidae Scud 1
Allocapnia Small Winter Stonefly 1
Pisidiidae Pill Clam 1
Hydropsyche Net-Spinning Caddisfly 1
Simulium Black Fly 1
Ameletus Combmouthed Minnow Mayfly 1
Isotomurus Elongate-Bodied Springtail 1
Stenonema Flatheaded Mayfly 1
Nigronia Megaloptera (Dark Fishfly) 1
Physa Air-Breathing Freshwater Snail 1
Stenelmis Beetle 1
Probezzia 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.