MBSS Site Summary for: PRUN-205-R-2015


Located on LOSTLAND RUN in the Potomac River U N Branch watershed, 8-digit code: 02141005.
This stream was visited in the spring on 4/7/2015 and again in the summer on 7/15/2015.

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 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 6,212 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 3.6 %
Agricultural Land Use 10.5 %
Forested Land Use 80.4 %


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

Physical Stream Habitat
Instream Habitat 18/20 (Optimal)
Epifaunal Substrate 18/20 (Optimal)
Velocity/Depth Diversity 18/20 (Optimal)
Pool Quality
Pool Extent = 31 meters 		15/20 (Suboptimal)
Riffle Quality
Riffle Extent = 51 meters 		18/20 (Optimal)
Shading 55 %
Embeddedness 5 %
Several measures of instream habitat were considered 'Optimal' at this location.


Stream Water Quality:
pH (lab) 7.57
Alkalinity
(acid neutralizing capacity) 		379.8 µeq/L
Dissolved organic carbon (DOC) 1.1265 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:
Cambarus bartonii bartonii

Exotic Plants:
No Exotic Plants Observed
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Epeorus Mayfly 32
Baetis Blue-Winged Olive Mayfly 13
Empididae Dance Fly 10
Pteronarcys Giant Stonefly 7
Leptophlebiidae Pronggilled Mayfly 6
Amphinemura Spring Stonefly 6
Chloroperlidae Green Stonefly 5
Micropsectra Non-Biting Midges 5
Ameletus Combmouthed Minnow Mayfly 4
Diphetor Mayfly 4
Hydropsyche Net-Spinning Caddisfly 4
Diplectrona Net-Spinning Caddisfly 3
Sweltsa Stonefly 3
Hexatoma Crane Fly 3
Microtendipes Non-Biting Midges 3
Leucrocuta Mayfly 3
Lepidostoma Little Brown Sedge Caddisfly 2
Parametriocnemus Non-Biting Midges 2
Acroneuria Golden Stoneflies 2
Tipula Crane Fly 1
Antocha Crane Fly 1
Yugus 1
Tubificidae Aquatic Worm 1
Bezzia Biting Midge 1
Polypedilum Non-Biting Midges 1
Maccaffertium March Brown And Cahill Mayfly 1
Dolophilodes Medium Evening Sedge Caddisfly 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.