MBSS Site Summary for: LOCH-123-R-2002


Located on LOCH RAVEN RES UT in the Loch Raven Reservoir watershed, 8-digit code: 02130805.
This stream was visited in the spring on 4/4/2002 and again in the summer on 6/13/2002.

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 - 2.3 / 5.0
Benthic IBI Poor - 1.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 293 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 29 %
Agricultural Land Use 17 %
Forested Land Use 49 %


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 8/20 (Marginal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = 50 meters 		11/20 (Suboptimal)
Riffle Quality
Riffle Extent = 25 meters 		9/20 (Marginal)
Shading 90 %
Embeddedness 40 %


Stream Water Quality:
Water temperature 18.2 ° C
Dissolved oxygen (DO) 7.7 mg/L
pH (lab) 8.21
Conductivity 700 µmho/cm
Alkalinity
(acid neutralizing capacity) 		4911 µeq/L
Dissolved organic carbon (DOC) 1.7 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 10 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Blacknose Dace 50
Green Sunfish 44
Yellow Bullhead 11
Tessellated Darter 10
Brown Bullhead 8
Creek Chub 6
Bluntnose Minnow 5
Bluegill 2
Brown Trout 2
Largemouth Bass 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
American Bullfrog
Wood 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 40
Tvetenia Non-Biting Midges 7
Cheumatopsyche Net-Spinning Caddisfly 7
Orthocladiinae Midge 6
Rheosmittia Non-Biting Midges 6
Crangonyx Amphipod 5
Simulium Black Fly 4
Micropsectra Non-Biting Midges 3
Hydropsyche Net-Spinning Caddisfly 3
Tanypodinae Non-Biting Midges 3
Optioservus Riffle Beetle 3
Oulimnius Riffle Beetle 3
Hemerodromia Tiny Fly 3
Elmidae Riffle Beetle 2
Amphipoda Scud 2
Naididae Aquatic Worm 2
Physa Air-Breathing Freshwater Snail 1
Gammarus Amphipod 1
Conchapelopia Non-Biting Midges 1
Diamesa Bloodworm 1
Neophylax Caddisfly 1
Hydropsychidae Common Netspinner Caddisfly 1
Antocha Crane Fly 1
Calopteryx Damselfly 1
Girardia Freshwater Flatworm 1
Caecidotea Isopod 1
Agabus Predatory Aquatic Beetle 1
Parametriocnemus Non-Biting Midges 1
Lumbriculidae Worm 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.