MBSS Site Summary for: WIRH-220-S-2000
Located on LEONARD POND RUN in the Wicomico River Head watershed,
8-digit code: 02130304.
This stream was visited in the spring on 3/27/2000 and again in the summer on 9/11/2000.
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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Good - 4.0 / 5.0
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Benthic IBI
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Good - 4.1 / 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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13,125 acres
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An example of a forested stream.
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Urban Land Use
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6.9 %
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Agricultural Land Use
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41.2 %
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Forested Land Use
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51.4 %
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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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19/20 (Optimal)
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Epifaunal Substrate
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16/20 (Optimal)
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Velocity/Depth Diversity
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18/20 (Optimal)
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Pool Quality
Pool Extent = 72 meters
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17/20 (Optimal)
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Riffle Quality
Riffle Extent = 30 meters
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15/20 (Suboptimal)
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Shading
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87 % |
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Embeddedness
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100 % |
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The embeddedness, a measure of silt on the stream bottom, was 100%. This is
very high, and may adversely affect biotic communities.
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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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| Water temperature |
17.5 ° C
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| Dissolved oxygen (DO) |
7.5 mg/L
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| pH (lab) |
6.23 |
| Conductivity |
140 µmho/cm
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Alkalinity
(acid neutralizing capacity)
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161.4 µeq/L |
| Dissolved organic carbon (DOC) |
16 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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| Northern Green Frog |
| Pickerel Frog |
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Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
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| Genus/Family |
Common Name |
Count |
| Simulium |
Black Fly
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20 |
| Eurylophella |
Mayfly
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18 |
| Polypedilum |
Non-Biting Midges
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18 |
| Paratanytarsus |
Non-Biting Midges
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15 |
| Cricotopus/Orthocladius |
Midge
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10 |
| Amphipoda |
Scud
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7 |
| Stenonema |
Flatheaded Mayfly
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5 |
| Conchapelopia |
Non-Biting Midges
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3 |
| Isoperla |
Stripetail Stonefly
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3 |
| Acentrella |
Tiny Blue-Winged Olive Mayflies
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3 |
| Caecidotea |
Isopod
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2 |
| Triaenodes |
Long-Horned Caddisfly
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1 |
| Nigronia |
Megaloptera (Dark Fishfly)
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1 |
| Endochironomus |
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1 |
| Gammarus |
Amphipod
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1 |
| Parametriocnemus |
Non-Biting Midges
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1 |
| Brillia |
Non-Biting Midges
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1 |
| Rheocricotopus |
Non-Biting Midges
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1 |
| Tvetenia |
Non-Biting Midges
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1 |
| Leptophlebiidae |
Pronggilled Mayfly
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1 |
| Hydroporus |
Water Beetle
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1 |
| Ephydridae |
Shore Fly
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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.
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