MBSS Site Summary for: PRMT-101-R-2007

Site Photos

Field photo showing stream conditions at site PRMT-101-R-2007-1 (Opens in a new window) Field photo showing stream conditions at site PRMT-101-R-2007-2 (Opens in a new window)

Located on Mill Swamp UT2 in the Potomac River M tidal watershed, 8-digit code: 02140102.
This stream was visited in the spring on 3/20/2007 and again in the summer on 7/23/2007.

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 - 3.9 / 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 203 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0.6 %
Agricultural Land Use 31 %
Forested Land Use 68.3 %


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) 6.27
Conductivity 0 µmho/cm
Alkalinity
(acid neutralizing capacity) 		42.1 µeq/L
Dissolved organic carbon (DOC) 1.975 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:
Fowler's Toad
Northern Green Frog
Northern Spring Peeper

Crayfish:
Cambarus

Exotic Plants:
English Ivy
Japanese Stiltgrass
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Amphinemura Spring Stonefly 27
Leuctra  Rolled-Winged Stonefly 16
Synurella Amphipod 15
Wormaldia Fingernet Caddisfly 13
Caecidotea Isopod 5
Perlodidae Perlodid Stonefly 4
Leuctridae Rolledwinged Stonefly 4
Prosimulium Black Fly 3
Tipula Crane Fly 3
Pycnopsyche Great Autumn Brown Sedge Caddisfly 2
Chloroperlidae Green Stonefly 2
Lepidostoma Little Brown Sedge Caddisfly 2
Diplectrona Net-Spinning Caddisfly 2
Eccoptura Yellow Stone Stonefly 2
Hydrobius Water Scavenger Beetle 1
Ephemerellidae Spiny Crawler Mayfly 1
Leptophlebiidae Pronggilled Mayfly 1
Cricotopus Non-Biting Midges 1
Diplocladius Non-Biting Midges 1
Zavrelimyia Non-Biting Midges 1
Nigronia Megaloptera (Dark Fishfly) 1
Cheumatopsyche Net-Spinning Caddisfly 1
Crangonyx Amphipod 1
Calopteryx Damselfly 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.