Aquatic Macroinvertebrates

Aquatic macroinvertebrates (e.g., insects, crustaceans, mollusks) are a key part of the environment

– They are a particularly important food resource for fish
They are important to both nutrient cycling and organic matter processing
Aquatic insects connect aquatic and terrestrial ecosystems with aquatic larvae and terrestrial adults.
They are used as water quality indicators because they exhibit a wide range of tolerances to point and nonpoint source pollution.
The Illinois Environmental Protection Agency (ILEPA) has used macroinvertebrates in stream assessment since the agency’s beginning.

Some key indicator groups include:

Ephemeroptera (mayflies)                            Plecoptera (stoneflies)


Trichoptera (caddisflies)                       
Odonata (dragonflies)

Our sampling methods include:

– ILEPA 20-Jab Allocation – 20 samples with a D frame net along a 300 ft stretch of stream
– Surber samples – a square frame with a fine net positioned downstream collects the benthic material in riffles within a given quadrat
– Visual hand collection

Projects:

I-90 post construction
I-90 Trout Park
I-294
– IL53-IL120 extension assessment
IL Rt 390 extension
North Chicago Wetland Mitigation Site
Hines Emerald Dragonfly detectability and distribution
Toxicity of road salt based on temperature

Publications: None yet.