MBSS Site Summary for: BRET-101-R-2002

Site Photos

Field photo showing stream conditions at site BRET-101-R-2002-384 (Opens in a new window) Field photo showing stream conditions at site BRET-101-R-2002-385 (Opens in a new window) Field photo showing stream conditions at site BRET-101-R-2002-386 (Opens in a new window) Field photo showing stream conditions at site BRET-101-R-2002-557 (Opens in a new window) Field photo showing stream conditions at site BRET-101-R-2002-558 (Opens in a new window) Field photo showing stream conditions at site BRET-101-R-2002-559 (Opens in a new window)

Located on MOLL DYERS RUN in the Breton Bay watershed, 8-digit code: 02140104.
This stream was visited in the spring on 3/11/2002 and again in the summer on 6/24/2002.

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 - 4.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 289 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 1 %
Agricultural Land Use 19 %
Forested Land Use 56 %


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 16/20 (Optimal)
Velocity/Depth Diversity 7/20 (Marginal)
Pool Quality
Pool Extent = 43 meters 		9/20 (Marginal)
Riffle Quality
Riffle Extent = 32 meters 		9/20 (Marginal)
Shading 94 %
Embeddedness 30 %


Stream Water Quality:
Water temperature 22.1 ° C
Dissolved oxygen (DO) 6.7 mg/L
pH (lab) 5.9
Conductivity 40 µmho/cm
Alkalinity
(acid neutralizing capacity) 		28.3 µeq/L
Dissolved organic carbon (DOC) 2.4 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 4 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 31
Least Brook Lamprey 9
American Eel 2
Creek Chubsucker 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Northern Green Frog
Northern Two-Lined Salamander
Wood Frog

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Simulium Black Fly 27
Micropsectra Non-Biting Midges 15
Acerpenna Tiny Blue-Winged Olive Mayflies 7
Tvetenia Non-Biting Midges 6
Oulimnius Riffle Beetle 6
Leuctridae Rolledwinged Stonefly 6
Chloroperlidae Green Stonefly 6
Stenelmis Beetle 5
Eukiefferiella Non-Biting Midges 4
Diplectrona Net-Spinning Caddisfly 3
Probezzia Biting Midges 3
Rheosmittia Non-Biting Midges 3
Trissopelopia Non-Biting Midges 3
Tanypodinae Non-Biting Midges 2
Prosimulium Black Fly 2
Parametriocnemus Non-Biting Midges 2
Microtendipes Non-Biting Midges 1
Hydropsyche Net-Spinning Caddisfly 1
Corynoneura Non-Biting Midges 1
Cricotopus Non-Biting Midges 1
Crangonyx Amphipod 1
Synurella Amphipod 1
Dolophilodes Medium Evening Sedge Caddisfly 1
Hexatoma Crane Fly 1
Zavrelimyia Non-Biting Midges 1
Leptophlebia Pronggilled Mayfly 1
Leptophlebiidae Pronggilled Mayfly 1
Polycentropus Tube Maker 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.