MBSS Site Summary for: MILE-113-T-2005


Located on Glebe Creek in the Miles River watershed, 8-digit code: 02130502.
This stream was visited in the spring on 3/22/2005 and again in the summer on 8/22/2005.

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 Poor - 1.3 / 5.0
Benthic IBI Poor - 1.9 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 245 acres 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 28 %
Agricultural Land Use 64 %
Forested Land Use 8 %


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

Physical Stream Habitat
Instream Habitat 5/20 (Poor)
Epifaunal Substrate 4/20 (Poor)
Velocity/Depth Diversity 5/20 (Poor)
Pool Quality
Pool Extent = 68 meters 		8/20 (Marginal)
Riffle Quality
Riffle Extent = 7 meters 		6/20 (Marginal)
Shading 85 %
Embeddedness 60 %
The embeddedness, a measure of silt on the stream bottom, was 60%. This is relatively high, and may exclude some biota.
Several measures of instream habitat were considered 'Poor' at this location.


Stream Water Quality:
Water temperature 22.5 ° C
Dissolved oxygen (DO) 5.2 mg/L
pH (lab) 6.87
Conductivity 346 µmho/cm
Alkalinity
(acid neutralizing capacity) 		901.5 µeq/L
Dissolved organic carbon (DOC) 2.3695 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 2 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Eastern Mudminnow 47
American Eel 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
New Jersey Chorus Frog
Northern Green Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Japanese Honeysuckle
Japanese Stiltgrass
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Tanytarsus Non-Biting Midges 30
Limnodrilus Worm 20
Rheosmittia Non-Biting Midges 10
Paratanytarsus Non-Biting Midges 10
Polypedilum Non-Biting Midges 6
Synurella Amphipod 4
Orthocladius Non-Biting Midges 4
Chironominae Non-Biting Midge 3
Pseudolimnophila Crane Fly 2
Tipulidae Cranefly 2
Calopteryx Damselfly 2
Tribelos Non-Biting Midges 2
Ironoquia Northern Caddisfly 1
Limnephilidae Northern Casemaker Caddisfly 1
Collembola Springtail 1
Isotomidae Springtail 1
Thienemanniella Non-Biting Midges 1
Orthocladiinae Midge 1
Argia Narrow-Winged Damselfly 1
Corynoneura Non-Biting Midges 1
Saetheria 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.