MBSS Site Summary for: NASS-302-S-2007
Located on Nassawango Creek in the Nassawango Creek watershed,
8-digit code: 02130205.
This stream was visited in the spring on 4/24/2007 and again in the summer on 8/8/2007.
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
|
Good - 4.7 / 5.0
|
|
Benthic IBI
|
Good - 4.4 / 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
|
19,604 acres
|
An example of a forested stream.
|
|
Urban Land Use
|
0.7 %
|
|
Agricultural Land Use
|
32.7 %
|
|
Forested Land Use
|
61.6 %
|
An example of woody debris in a stream.
|
Physical Stream Habitat
|
|
Instream Habitat
|
17/20 (Optimal)
|
|
Epifaunal Substrate
|
16/20 (Optimal)
|
|
Velocity/Depth Diversity
|
6/20 (Marginal)
|
Pool Quality
Pool Extent = 75 meters
|
17/20 (Optimal)
|
Riffle Quality
Riffle Extent = 0 meters
|
0/20 (Poor)
|
|
Shading
|
80 % |
|
Embeddedness
|
100 % |
|
The embeddedness, a measure of silt on the stream bottom, was 100%. This is
very high, and may adversely affect biotic communities.
|
|
Several measures of instream habitat were considered 'Optimal' at this location.
|
Stream Water Quality:
|
| Water temperature |
26 ° C
|
| Dissolved oxygen (DO) |
3.1 mg/L
|
|
Dissolved oxygen levels measured in the stream were very low (3.1 mg/L).
Many fishes and other aquatic animals cannot tolerate low levels of oxygen in the water.
|
| pH (lab) |
6.18 |
| Conductivity |
97 µmho/cm
|
Alkalinity
(acid neutralizing capacity)
|
150.4 µeq/L |
| Dissolved organic carbon (DOC) |
19.4902 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.
|
 |
| American Bullfrog |
| Eastern American Toad |
| Fowler's Toad |
| Gray Treefrog |
| Northern Black Racer |
| Northern Green Frog |
| Pickerel Frog |
| Southern Leopard Frog |
| Stinkpot |
| Orconectes limosus |
| Procambarus acutus acutus |
| No Exotic Plants Observed |
|
|
|
Sensitive taxa: Green, Tolerant: Red, Intermediate: Gold.
|
| Genus/Family |
Common Name |
Count |
| Ablabesmyia |
Non-Biting Midge
|
34 |
| Campeloma |
|
8 |
| Caecidotea |
Isopod
|
8 |
| Stenonema |
Flatheaded Mayfly
|
7 |
| Hydrobiidae |
Pebble Snail
|
7 |
| Hyalella |
Amphipod
|
6 |
| Tanytarsus |
Non-Biting Midges
|
4 |
| Thienemannimyia group |
Non-Biting Midges
|
4 |
| Tribelos |
Non-Biting Midges
|
4 |
| Pseudosmittia |
|
3 |
| Eurylophella |
Mayfly
|
3 |
| Lumbriculidae |
Worm
|
3 |
| Orthocladius |
Non-Biting Midges
|
2 |
| Gomphus |
Clubtail Dragonfly
|
2 |
| Musculium |
Fingernail Clam
|
2 |
| Triaenodes |
Long-Horned Caddisfly
|
2 |
| Pycnopsyche |
Great Autumn Brown Sedge Caddisfly
|
1 |
| Platycentropus |
|
1 |
| Polypedilum |
Non-Biting Midges
|
1 |
| Thienemanniella |
Non-Biting Midges
|
1 |
| Leptophlebiidae |
Pronggilled Mayfly
|
1 |
| Hydroporus |
Water Beetle
|
1 |
| Nepidae |
Water Scorpion
|
1 |
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.
(Opens in a new window)
(Opens in a new window)
