MBSS Site Summary for: PRUN-205-R-2001

Site Photos

Field photo showing stream conditions at site PRUN-205-R-2001-1 (Opens in a new window) Field photo showing stream conditions at site PRUN-205-R-2001-2 (Opens in a new window)

Located on LOSTLAND RUN in the Potomac River U N Branch watershed, 8-digit code: 02141005.
This stream was visited in the spring on 4/2/2001 and again in the summer on 6/25/2001.

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 Good - 4.0 / 5.0
Benthic IBI Good - 4.5 / 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 6,222 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 4 %
Agricultural Land Use 11 %
Forested Land Use 80 %


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

Physical Stream Habitat
Instream Habitat 19/20 (Optimal)
Epifaunal Substrate 18/20 (Optimal)
Velocity/Depth Diversity 18/20 (Optimal)
Pool Quality
Pool Extent = 35 meters 		16/20 (Optimal)
Riffle Quality
Riffle Extent = 55 meters 		20/20 (Optimal)
Shading 90 %
Embeddedness 15 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
Water temperature 12.8 ° C
Dissolved oxygen (DO) 10.2 mg/L
pH (lab) 6.9
Conductivity 170 µmho/cm
Alkalinity
(acid neutralizing capacity) 		189 µeq/L
Dissolved organic carbon (DOC) 0.5 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
Green Sunfish 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
No crayfish noted.

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ameletus Combmouthed Minnow Mayfly 17
Epeorus Mayfly 15
Amphinemura Spring Stonefly 14
Micropsectra Non-Biting Midges 10
Hexatoma Crane Fly 7
Taeniopteryx Winter Stonefly 7
Sweltsa Stonefly 6
Diplectrona Net-Spinning Caddisfly 6
Baetis Blue-Winged Olive Mayfly 5
Naididae Aquatic Worm 2
Hydropsyche Net-Spinning Caddisfly 2
Acroneuria Golden Stoneflies 2
Tallaperla Roach-Like Stonefly 2
Acentrella Tiny Blue-Winged Olive Mayflies 2
Polycentropus Tube Maker Caddisfly 1
Ephemerella Sulphur Mayfly 1
Parametriocnemus Non-Biting Midges 1
Paraphaenocladius Non-Biting Midges 1
Parachaetocladius Non-Biting Midge 1
Ceratopogon Biting Midge 1
Enchytraeidae Aquatic Worm 1
Chrysops Deerfly 1
Stenonema Flatheaded Mayfly 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.