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

Site Photos

Located on GREEN SPRING RUN in the Potomac River WA Cnty watershed, 8-digit code: 02140501.
This stream was visited in the spring on 3/25/2002 and again in the summer on 7/9/2002.

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 N R
Benthic IBI Fair - 3.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 324 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 5 %
Agricultural Land Use 8 %
Forested Land Use 87 %


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

Physical Stream Habitat
Instream Habitat not sampled
Epifaunal Substrate not sampled
Velocity/Depth Diversity not sampled
Pool Quality not sampled
Riffle Quality not sampled
Shading not sampled
Embeddedness not sampled


Stream Water Quality:
pH (lab) 6.95
Alkalinity
(acid neutralizing capacity) 		495.8 µeq/L
Dissolved organic carbon (DOC) 3 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:
Fish data is unavailable or no fish observed.

Amphibians and Reptiles:
Eastern Box Turtle

Crayfish:
Cambaridae

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Zavrelimyia Non-Biting Midges 12
Pseudolimnophila Crane Fly 11
Isotomurus Elongate-Bodied Springtail 9
Tanypodinae Non-Biting Midges 6
Conchapelopia Non-Biting Midges 5
Leptophlebia Pronggilled Mayfly 5
Corynoneura Non-Biting Midges 4
Dixidae Dixid Midge 4
Stegopterna Black Fly 4
Ameletus Combmouthed Minnow Mayfly 4
Eurylophella Mayfly 3
Hydrobius Water Scavenger Beetle 3
Micropsectra Non-Biting Midges 2
Nigronia Megaloptera (Dark Fishfly) 2
Ablabesmyia Non-Biting Midge 2
Physa Air-Breathing Freshwater Snail 2
Prosimulium Black Fly 2
Tipula Crane Fly 1
Tipulidae Cranefly 1
Enchytraeidae Aquatic Worm 1
Ceratopogon Biting Midge 1
Chironomini Non-Biting Midge 1
Orthocladiinae Midge 1
Heterotrissocladius European Non-Biting Midge 1
Stenonema Flatheaded Mayfly 1
Dolichopodidae Long-Legged Fly 1
Pisidiidae Pill Clam 1
Lumbriculidae Worm 1
Leptophlebiidae Pronggilled Mayfly 1
Centroptilum Small Minnow Mayfly 1
Capniidae Small Winter Stonefly 1
Pyralidae Snout Moth 1
Cordulegaster Spiketail Dragonfly 1
Amphinemura Spring Stonefly 1
Isoperla Stripetail 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.