Iowa DNR
BioNet
River & Stream Biological Monitoring
Fish and Benthic Macroinvertebrate Surveys
Physical Habitat Assessments

East Nodaway River Hawleyville

Invert Sampling Session #11618

Session Data

Sample Date
8/19/2025
Sampling Gear
Surber
Lab ID Number
2702532
Sample Quality
Fair
Created Date
2/11/2026 1:56:00 PM
Last Update
3/23/2026 9:56:24 AM

Semi-Quantitative Sampling

Replicate Number
2
Dominant Form Periphyton
Nonfilamentous Algae
(LT- Light, MD- Moderate, MH- Moderate/Heavy, HV- Heavy)
Periphyton Growth
MD
Sedimentation/Embededness
MH
Colonization
LT
Comments

Riffle was impacted by sedimentation.

Collected Benthic Macroinvertebrates

  • Total taxa collected 16
  • Total individuals collected 117
Scientific Name Order Family Common Name # Collected
Acentrella parvula Ephemeroptera Baetidae Small Minnow Mayflies 1
Baetidae Ephemeroptera Baetidae Small Minnow Mayflies 3
Baetis intercalaris Ephemeroptera Baetidae Small Minnow Mayflies 1
Ceratopsyche morosa Trichoptera Hydropsychidae Common Netspinner Caddisflies 2
Cheumatopsyche Trichoptera Hydropsychidae Common Netspinner Caddisflies 60
Chironomidae Diptera Chironomidae Non-Biting Midges, Midges 13
Fallceon quilleri Ephemeroptera Baetidae Small Minnow Mayflies 12
Girardia Tricladida Dugesiidae Flatworms 2
Helicopsyche borealis Trichoptera Helicopsychidae Snailcase Maker Caddisflies 1
Hydropsyche simulans Trichoptera Hydropsychidae Common Netspinner Caddisflies 4
Hydropsychidae Trichoptera Hydropsychidae Common Netspinner Caddisflies 9
Lepidoptera Lepidoptera Moths, Butterflies 2
Sphaeriidae Veneroida Sphaeriidae Fingernail clams 1
Stenelmis Coleoptera Elmidae Riffle Beetles 3
Stenelmis crenata Coleoptera Elmidae Riffle Beetles 2
Tricorythodes Ephemeroptera Leptohyphidae Little Stout Crawler Mayflies 1

= Excluded from taxa count metrics

Notes: