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A sampler for quantifying the vertical distribution of aquatic macroinvertebrates in wetlands is described. This device will facilitate quantitative sampling of macroinvertebrates in waterfowl ecology and related studies. Because it simultaneously collects benthic and pelagic invertebrates, the sampler reduces bias associated with sampling macroinvertebrates that occupy the benthic-pelagic interface of wetlands. The sampling device also separates benthic and pelagic macroinvertebrates into separate vertical profiles to facilitate studies of distribution patterns or the influence of chemical and physical gradients on invertebrate vertical distribution.

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Table of Contents

• Introduction
• Literature Cited

Figures

• Figure 1 -- Schematic view of sampler in open and closed position.
• Figure 2 -- Expanded view of water-column compartment and door closure unit.

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Jeffrey Mackay, U.S. Fish and Wildlife Service, Northern Prairie Wildlife Research Center, 6924 Tremont Road, Dixon, CA 95620; Present address: Ruby Lake National Wildlife Refuge, HC 60 Box 860, Ruby Valley, NV 89833
Ned H. Euliss, Jr., U.S. Fish and Wildlife Service, Northern Prairie Wildlife Research Center, Route 1, Box 96C, Jamestown, ND 58401-9736

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