MBSS Site Summary for: GWYN-311-H-2011

Site Photos

Field photo showing stream conditions at site GWYN-311-H-2011-1 (Opens in a new window) Field photo showing stream conditions at site GWYN-311-H-2011-2 (Opens in a new window)

Located on GWYNNS FALLS in the Gwynns Falls watershed, 8-digit code: 02130905.
This stream was visited in the spring on 4/11/2011 and again in the summer on 8/23/2011.

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 N R
Benthic IBI Fair - 3.3 / 5.0

Land Use

Land use can provide important information for determining stream health.
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Catchment area 15,661 acres A highly channelized urban stream with concrete banks. An example of a highly channelized urban stream.
Urban Land Use 60 %
Agricultural Land Use 8 %
Forested Land Use 30 %


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

Physical Stream Habitat
Instream Habitat not sampled
Epifaunal Substrate not sampled
Velocity/Depth Diversity not sampled
Pool Quality not sampled
Riffle Quality not sampled
Shading not sampled
Embeddedness not sampled


Stream Water Quality:
pH (lab) 8.08
Alkalinity
(acid neutralizing capacity) 		1268.2 µeq/L
Dissolved organic carbon (DOC) 1.8119 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:
Fish data is unavailable or no fish observed.

Amphibians and Reptiles:
No amphibians and reptiles noted.

Crayfish:
Orconectes virilis

Exotic Plants:
No exotic plants noted.
 

Benthic Macroinvertebrates:
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
Genus/Family Common Name Count
Hydrobaenus Midge 11
Maccaffertium March Brown And Cahill Mayfly 10
Stenelmis Beetle 10
Orthocladiinae Midge 8
Thienemannimyia Group Non-Biting Midges 8
Dicrotendipes Non-Biting Midges 6
Tanytarsus Non-Biting Midges 6
Crangonyx Amphipod 5
Cricotopus Non-Biting Midges 4
Tribelos Non-Biting Midges 3
Orthocladius Non-Biting Midges 3
Optioservus Riffle Beetle 3
Stenonema Flatheaded Mayfly 3
Hydroptila Microcaddisfly 3
Hydropsyche Net-Spinning Caddisfly 2
Ablabesmyia Non-Biting Midge 2
Argia Narrow-Winged Damselfly 2
Psephenus Water Penny 2
Rheocricotopus Non-Biting Midges 1
Isonychia Slate Drake Mayfly 1
Boyeria Spotted Darner Dragonfly 1
Ephemerella Sulphur Mayfly 1
Hemerodromia Tiny Fly 1
Polycentropus Tube Maker Caddisfly 1
Dubiraphia Riffle Beetle 1
Macronychus Riffle Beetle 1
Microcylloepus Riffle Beetle 1
Synorthocladius 1
Microtendipes Non-Biting Midges 1
Enallagma Narrow-Winged Damselfly 1
Cheumatopsyche Net-Spinning Caddisfly 1
Girardia Freshwater Flatworm 1
Prostoma Freshwater Nemertean (Ribbon Worm) 1
ERPOBDELLIDAE Leech 1
Stygobromus Amphipod 1
Corbicula Basket Clam 1
Antocha Crane Fly 1
Calopteryx Damselfly 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.