MBSS Site Summary for: LOCH-216-R-2002

Site Photos

Field photo showing stream conditions at site LOCH-216-R-2002-488 (Opens in a new window) Field photo showing stream conditions at site LOCH-216-R-2002-489 (Opens in a new window)

Located on OWL BRANCH UT in the Loch Raven Reservoir watershed, 8-digit code: 02130805.
This stream was visited in the spring on 4/2/2002 and again in the summer on 7/10/2002.

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 - 2.0 / 5.0
Benthic IBI Good - 5.0 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 853 acres A stream flowing through a densely forested area. An example of a forested stream.
Urban Land Use 0 %
Agricultural Land Use 50 %
Forested Land Use 50 %


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

Physical Stream Habitat
Instream Habitat 16/20 (Optimal)
Epifaunal Substrate 13/20 (Suboptimal)
Velocity/Depth Diversity 9/20 (Marginal)
Pool Quality
Pool Extent = 42 meters 		10/20 (Marginal)
Riffle Quality
Riffle Extent = 33 meters 		12/20 (Suboptimal)
Shading 98 %
Embeddedness 65 %
The embeddedness, a measure of silt on the stream bottom, was 65%. This is relatively high, and may exclude some biota.


Stream Water Quality:
Water temperature 19.4 ° C
Dissolved oxygen (DO) 8.4 mg/L
pH (lab) 7.23
Conductivity 140 µmho/cm
Alkalinity
(acid neutralizing capacity) 		356.8 µeq/L
Dissolved organic carbon (DOC) 1.1 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
Blacknose Dace 59
Biologists sampling fish communities.
Electrofishing to sample fish communities.

Amphibians and Reptiles:
Northern Two-Lined Salamander

Crayfish:
Cambaridae

Exotic Plants:
Japanese Honeysuckle
Mile-A-Minute
Multiflora Rose
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Ephemerella Sulphur Mayfly 40
Oulimnius Riffle Beetle 10
Eurylophella Mayfly 7
Stenonema Flatheaded Mayfly 5
Dicranota Hairy-Eyed Cranefly 5
Optioservus Riffle Beetle 5
Baetidae Small Minnow Mayfly 3
Prosimulium Black Fly 3
Anchytarsus Beetle 2
Ameletus Combmouthed Minnow Mayfly 2
Perlidae Common Stonefly 2
Pseudolimnophila Crane Fly 2
Cheumatopsyche Net-Spinning Caddisfly 2
Diplectrona Net-Spinning Caddisfly 2
Conchapelopia Non-Biting Midges 2
Thienemanniella Non-Biting Midges 2
Tvetenia Non-Biting Midges 2
Heleniella European Non-Biting Midge 2
Heptageniidae Flathead Mayfly 1
Pisidiidae Pill Clam 1
Dixa 1
Amphinemura Spring Stonefly 1
Isonychia Slate Drake Mayfly 1
Corynoneura Non-Biting Midges 1
Orthocladius Non-Biting Midges 1
Sympotthastia Non-Biting Midges 1
Tanytarsus Non-Biting Midges 1
Tipulidae Cranefly 1
Antocha Crane Fly 1
Stenelmis Beetle 1
Probezzia Biting Midges 1
Paraleptophlebia Blue Quill Mayfly 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.