MBSS Site Summary for: ZEKI-219-R-2015
Located on JORDAN SWAMP in the Zekiah Swamp watershed,
8-digit code: 02140108.
This stream was visited in the spring on 4/8/2015 and again in the summer on 6/10/2015.
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.
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Fish IBI
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Fair - 3.7 / 5.0
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Benthic IBI
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Fair - 3.0 / 5.0
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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.)
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Catchment area
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5,640 acres
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An example of a highly channelized urban stream.
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Urban Land Use
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50.1 %
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Agricultural Land Use
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10.7 %
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Forested Land Use
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35.8 %
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An example of woody debris in a stream.
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Physical Stream Habitat
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Instream Habitat
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17/20 (Optimal)
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Epifaunal Substrate
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18/20 (Optimal)
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Velocity/Depth Diversity
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15/20 (Suboptimal)
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Pool Quality
Pool Extent = 61 meters
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18/20 (Optimal)
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Riffle Quality
Riffle Extent = 44 meters
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15/20 (Suboptimal)
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Shading
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70 % |
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Embeddedness
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65 % |
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The embeddedness, a measure of silt on the stream bottom, was 65%. This is
relatively high, and may exclude some biota.
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Several measures of instream habitat were considered 'Optimal' at this location.
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Stream Water Quality:
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| pH (lab) |
7.4 |
Alkalinity
(acid neutralizing capacity)
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479.2 µeq/L |
| Dissolved organic carbon (DOC) |
6.4971 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.
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| Cope's Gray Treefrog |
| Fowler's Toad |
| Northern Green Frog |
| Southern Leopard Frog |
| Orconectes limosus |
| Procambarus clarkii |
| Autumn Olive |
| Japanese Stiltgrass |
| Mile-A-Minute |
| Multiflora Rose |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Stenelmis |
Beetle
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27 |
| Rheotanytarsus |
Non-Biting Midges
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25 |
| Orthocladius |
Non-Biting Midges
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13 |
| Ancyronyx |
Spider Riffle Beetle
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11 |
| Stempellinella |
Non-Biting Midges
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6 |
| Nanocladius |
Non-Biting Midges
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6 |
| Rheocricotopus |
Non-Biting Midges
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5 |
| Cheumatopsyche |
Net-Spinning Caddisfly
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4 |
| Ablabesmyia |
Non-Biting Midge
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2 |
| Microtendipes |
Non-Biting Midges
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2 |
| Polypedilum |
Non-Biting Midges
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2 |
| Parakiefferiella |
European Non-Biting Midge
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2 |
| Oecetis |
Long-Horned Caddisfly
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2 |
| Argia |
Narrow-Winged Damselfly
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2 |
| Stenochironomus |
European Non-Biting Midge
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1 |
| Ceratopogonidae |
Biting Midge
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1 |
| Neophylax |
Caddisfly
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1 |
| Gomphus |
Clubtail Dragonfly
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1 |
| Phaenopsectra |
Non-Biting Midges
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1 |
| Chironomini |
Non-Biting Midge
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1 |
| Tanypodinae |
Non-Biting Midges
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1 |
| Tanytarsini |
Non-Biting Midges
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1 |
| Thienemannimyia Group |
Non-Biting Midges
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1 |
| Limnephilidae |
Northern Casemaker Caddisfly
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1 |
| Pisidiidae |
Pill Clam
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1 |
Sampling with a kick net.
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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.
