MBSS Site Summary for: LOCH-114-R-2002

Site Photos

Field photo showing stream conditions at site LOCH-114-R-2002-517 (Opens in a new window)

Located on OREGON BR 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 6/6/2002.

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 - 1.7 / 5.0
Benthic IBI Fair - 3.7 / 5.0

Land Use

Land use can provide important information for determining stream health.
(Hint: Screen readers will announce definitions; mouse users can hover over dotted text.)
Catchment area 1,558 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 2 %
Agricultural Land Use 53 %
Forested Land Use 43 %


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

Physical Stream Habitat
Instream Habitat 15/20 (Suboptimal)
Epifaunal Substrate 12/20 (Suboptimal)
Velocity/Depth Diversity 11/20 (Suboptimal)
Pool Quality
Pool Extent = 65 meters 		14/20 (Suboptimal)
Riffle Quality
Riffle Extent = 13 meters 		7/20 (Marginal)
Shading 95 %
Embeddedness 55 %
The embeddedness, a measure of silt on the stream bottom, was 55%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 20.3 ° C
Dissolved oxygen (DO) 7.5 mg/L
pH (lab) 8.05
Conductivity 400 µmho/cm
Alkalinity
(acid neutralizing capacity) 		2290 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 5 fish species were collected.
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Common name Count
Longnose Dace 46
Blacknose Dace 31
Creek Chub 18
Rosyside Dace 1
White Sucker 1
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Green Frog
Northern Two-Lined Salamander

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
Ephemerella Sulphur Mayfly 69
Corynoneura Non-Biting Midges 7
Polypedilum Non-Biting Midges 6
Oulimnius Riffle Beetle 6
Parametriocnemus Non-Biting Midges 5
Stenonema Flatheaded Mayfly 5
Thienemanniella Non-Biting Midges 3
Micropsectra Non-Biting Midges 3
Optioservus Riffle Beetle 2
Diplectrona Net-Spinning Caddisfly 2
Hydropsyche Net-Spinning Caddisfly 1
Conchapelopia Non-Biting Midges 1
Simulium Black Fly 1
Chimarra Fingernet Caddisfly 1
Philopotamidae Fingernet Caddisfly 1
Gordiidae Horsehair Worm 1
Serratella Mayfly 1
Hydrobaenus Midge 1
Orthocladiinae Midge 1
Cheumatopsyche Net-Spinning Caddisfly 1
Tanytarsus Non-Biting Midges 1
Orthocladius Non-Biting Midges 1
Cricotopus Non-Biting Midges 1
Polycentropus Tube Maker Caddisfly 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.