MBSS Site Summary for: BALT-112-R-2004

Site Photos

Field photo showing stream conditions at site BALT-112-R-2004-76 (Opens in a new window) Field photo showing stream conditions at site BALT-112-R-2004-77 (Opens in a new window) Field photo showing stream conditions at site BALT-112-R-2004-78 (Opens in a new window)

Located on MARLEY CR in the Baltimore Harbor watershed, 8-digit code: 02130903.
This stream was visited in the spring on 3/10/2004 and again in the summer on 6/14/2004.

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 - 1.7 / 5.0
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 412 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 75 %
Agricultural Land Use 14 %
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 7/20 (Marginal)
Epifaunal Substrate 9/20 (Marginal)
Velocity/Depth Diversity 4/20 (Poor)
Pool Quality
Pool Extent = 41 meters 		7/20 (Marginal)
Riffle Quality
Riffle Extent = 34 meters 		7/20 (Marginal)
Shading 95 %
Embeddedness 100 %
The embeddedness, a measure of silt on the stream bottom, was 100%. This is very high, and may adversely affect biotic communities.


Stream Water Quality:
Water temperature 18.3 ° C
Dissolved oxygen (DO) 3.5 mg/L
Dissolved oxygen levels measured in the stream were very low (3.5 mg/L). Many fishes and other aquatic animals cannot tolerate low levels of oxygen in the water.
pH (lab) 6.98
Conductivity 321 µmho/cm
Alkalinity
(acid neutralizing capacity) 		955 µeq/L
Dissolved organic carbon (DOC) 7.1 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
Redfin Pickerel 8
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog

Crayfish:
No crayfish noted.

Exotic Plants:
Mile-A-Minute
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Thienemannimyia group Non-Biting Midges 16
Zavrelimyia Non-Biting Midges 11
Orthocladius Non-Biting Midges 9
Lumbriculidae Worm 5
Physa Air-Breathing Freshwater Snail 4
Tipula Crane Fly 4
Girardia Freshwater Flatworm 4
Pseudosuccinea Air Breathing Freshwater Snail 3
Tanypodinae Non-Biting Midges 2
Tanytarsus Non-Biting Midges 1
Polypedilum Non-Biting Midges 1
Crangonyctidae Scud 1
Limnophyes Non-Biting Midge 1
Eukiefferiella Non-Biting Midges 1
Isotomurus Elongate-Bodied Springtail 1
Enchytraeidae Aquatic Worm 1
Naididae Aquatic Worm 1
Bittacomorpha 1
Coptotomus 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.