MBSS Site Summary for: GILB-111-R-2001

Site Photos

Field photo showing stream conditions at site GILB-111-R-2001-10 (Opens in a new window) Field photo showing stream conditions at site GILB-111-R-2001-11 (Opens in a new window) Field photo showing stream conditions at site GILB-111-R-2001-12 (Opens in a new window) Field photo showing stream conditions at site GILB-111-R-2001-13 (Opens in a new window) Field photo showing stream conditions at site GILB-111-R-2001-8 (Opens in a new window) Field photo showing stream conditions at site GILB-111-R-2001-9 (Opens in a new window)

Located on ODEN 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 Poor - 2.7 / 5.0
Benthic IBI Good - 4.7 / 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 1,294 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 40 %
Forested Land Use 58 %


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

Physical Stream Habitat
Instream Habitat 14/20 (Suboptimal)
Epifaunal Substrate 12/20 (Suboptimal)
Velocity/Depth Diversity 13/20 (Suboptimal)
Pool Quality
Pool Extent = 35 meters 		13/20 (Suboptimal)
Riffle Quality
Riffle Extent = 50 meters 		11/20 (Suboptimal)
Shading 90 %
Embeddedness 60 %
The embeddedness, a measure of silt on the stream bottom, was 60%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 17.8 ° C
Dissolved oxygen (DO) 8.9 mg/L
pH (lab) 6.91
Conductivity 110 µmho/cm
Alkalinity
(acid neutralizing capacity) 		170.6 µeq/L
Dissolved organic carbon (DOC) 1.7 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 255
Tessellated Darter 16
Eastern Mudminnow 5
Least Brook Lamprey 2
American Eel 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog
Northern Two-Lined Salamander
Pickerel Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ephemerella Sulphur Mayfly 51
Acerpenna Tiny Blue-Winged Olive Mayflies 19
Chloroperlidae Green Stonefly 5
Neophylax Caddisfly 3
Hemerodromia Tiny Fly 3
Optioservus Riffle Beetle 3
Prosimulium Black Fly 2
Hydropsychidae Common Netspinner Caddisfly 2
Tipula Crane Fly 2
Nemouridae Nemourid Stonefly 2
Rheosmittia Non-Biting Midges 2
Tanytarsus Non-Biting Midges 1
Tvetenia Non-Biting Midges 1
Limnephilidae Northern Casemaker Caddisfly 1
Conchapelopia Non-Biting Midges 1
Eurylophella Mayfly 1
Cricotopus/Orthocladius Midge 1
Isotomurus Elongate-Bodied Springtail 1
Stenonema Flatheaded Mayfly 1
Pisidium Freshwater Pea (Pill) Clam 1
Pseudolimnophila Crane Fly 1
Spirosperma Aquatic Oligochaete Worm 1
Probezzia Biting Midges 1
Oulimnius Riffle Beetle 1
Eccoptura Yellow Stone Stonefly 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.