Macroinvertebrate collection (DP1.20120.001)

Benthic macroinvertebrate samples are collected three times per year at wadeable stream, river, and lake sites during aquatic biology bout windows, roughly in spring, summer, and fall. Samples are collected using the most appropriate sampler for the habitat type, including Surber, Hess, hand corer, modified kicknet, D-frame sweep, and petite ponar samplers. In wadeable streams, samples are collected in the two most dominant habitat types (e.g. riffles, runs, pools, step pools). In lakes, samples are collected near the buoy, and nearshore sensors using a petite ponar, and in littoral areas using a D-frame sweep. In rivers, samples are collected near the buoy and two other deep-water locations using a petite ponar sampler, and in littoral areas using a D-frame sweep or large-woody debris sampler. Samples are preserved in ethanol in the field, returned to the domain support facility for a preservative change where a small volume of glycerol is added to help keep invertebrates from getting brittle. Samples are shipped to a taxonomy lab for sorting and identification, including count of each taxon per size class (to nearest mm) and identification to lowest practical taxon (genus or species). Instrumentation: