MBSS Site Summary for: ANAC-102-E-2005


Located on Beaverdam Creek UT2 in the Anacostia River watershed, 8-digit code: 02140205.
This stream was visited in the spring on 4/12/2005 and again in the summer on 8/23/2005.

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 Poor - 2.1 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area No data available Cows standing in a stream at a site with high agricultural land use. Cows survey the sampling procedure at this extreme example of a highly agriculturalized site.
Urban Land Use No data available
Agricultural Land Use No data available
Forested Land Use No data available


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

Physical Stream Habitat
Instream Habitat 10/20 (Marginal)
Epifaunal Substrate 5/20 (Poor)
Velocity/Depth Diversity 10/20 (Marginal)
Pool Quality
Pool Extent = 63 meters 		10/20 (Marginal)
Riffle Quality
Riffle Extent = 18 meters 		5/20 (Poor)
Shading 92 %
Embeddedness 65 %
The embeddedness, a measure of silt on the stream bottom, was 65%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 21.4 ° C
Dissolved oxygen (DO) 6.9 mg/L
pH (lab) 7.35
Conductivity 422 µmho/cm
Alkalinity
(acid neutralizing capacity) 		778.8001 µeq/L
Dissolved organic carbon (DOC) 5.1732 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:
Northern Green Frog
Northern Watersnake
Pickerel Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Mile-A-Minute
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Orthocladius Non-Biting Midges 30
Prostoia Spring Stonefly 19
Hydropsyche Net-Spinning Caddisfly 13
Tubificidae Aquatic Worm 12
Limnodrilus Worm 8
Enchytraeidae Aquatic Worm 5
Naididae Aquatic Worm 5
Stenelmis Beetle 4
Polypedilum Non-Biting Midges 4
Simulium Black Fly 2
Diamesa Bloodworm 2
Caecidotea Isopod 1
Cheumatopsyche Net-Spinning Caddisfly 1
Parametriocnemus Non-Biting Midges 1
Crangonyctidae Scud 1
Cordulegaster Spiketail Dragonfly 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.