MBSS Site Summary for: BALT-101-R-2009

Site Photos

Field photo showing stream conditions at site BALT-101-R-2009-1 (Opens in a new window) Field photo showing stream conditions at site BALT-101-R-2009-2 (Opens in a new window)

Located on UT Marley Creek in the Baltimore Harbor watershed, 8-digit code: 02130903.
This stream was visited in the spring on 3/16/2009 and again in the summer on 6/29/2009.

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 - 1.0 / 5.0
Benthic IBI Poor - 2.4 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 178 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 83.7 %
Agricultural Land Use 8.3 %
Forested Land Use 5.8 %


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

Physical Stream Habitat
Instream Habitat 2/20 (Poor)
Epifaunal Substrate 4/20 (Poor)
Velocity/Depth Diversity 6/20 (Marginal)
Pool Quality
Pool Extent = 59 meters 		6/20 (Marginal)
Riffle Quality
Riffle Extent = 17 meters 		4/20 (Poor)
Shading 75 %
Embeddedness 100 %
The embeddedness, a measure of silt on the stream bottom, was 100%. This is very high, and may adversely affect biotic communities.
Several measures of instream habitat were considered 'Poor' at this location.


Stream Water Quality:
Water temperature 18.8 ° C
Dissolved oxygen (DO) 8.4 mg/L
pH (lab) 7.24
Conductivity 568 µmho/cm
Alkalinity
(acid neutralizing capacity) 		1051.8 µeq/L
Dissolved organic carbon (DOC) 8.0296 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
No Fish Observed 0
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog

Crayfish:
No crayfish noted.

Exotic Plants:
Autumn Olive
Mile-A-Minute
Mimosa
Multiflora Rose
Oriental Bittersweet
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Zavrelimyia Non-Biting Midges 25
Physa Air-Breathing Freshwater Snail 24
Lumbriculidae Worm 17
Orthocladius Non-Biting Midges 7
Tanypodinae Non-Biting Midges 5
Argia Narrow-Winged Damselfly 5
Musculium Fingernail Clam 3
Tipula Crane Fly 2
Calopteryx Damselfly 2
Lepidoptera Aquatic Moth 1
Nemouridae Nemourid Stonefly 1
Cheumatopsyche Net-Spinning Caddisfly 1
Cryptochironomus Non-Biting Midges 1
Prostoma Freshwater Nemertean (Ribbon Worm) 1
Phaenopsectra Non-Biting Midges 1
Polypedilum Non-Biting Midges 1
Tvetenia Non-Biting Midges 1
Limnephilidae Northern Casemaker Caddisfly 1
Neoporus 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.