Resource Image

Microhabitats and macroinvertebrates: Logjam influences on stream morphology and macroinvertebrate traits

Author(s): Carolyn Cummins1, Adriana E. Martinez2

1. University of Georgia 2. Southern Illinois University Edwardsville

1614 total view(s), 104 download(s)

0 comment(s) (Post a comment)

Summary:
Logjams are important hydrologic features that shape stream channel morphology and create habitat for organisms. In this lesson, students learn about and measure logjams in a wadeable stream and predict how logjams affect macroinvertebrate…

more

Logjams are important hydrologic features that shape stream channel morphology and create habitat for organisms. In this lesson, students learn about and measure logjams in a wadeable stream and predict how logjams affect macroinvertebrate communities. This lesson is geared toward undergraduates, and we recommend conducting field activities in groups of 3-5. We also recommend using a wadeable stream that contains both an area with a logjam and, some distance away (10-100m), an area without a logjam for comparison purposes. Necessary equipment includes writing supplies (paper, pencils), tape measure, datasheets, and macroinvertebrate identification (ID) keys with functional feeding group information. Students will begin the lesson by examining the riverscape, identifying channel morphology changes and major habitats in the stream, and discussing how these are influenced by logjams. Students will then examine macroinvertebrate ID keys and make a prediction about the functional feeding groups they will find in the different habitat zones. After this lesson, students will be able to identify how logjams influence channel morphology and predict how they affect macroinvertebrate habitat.

Licensed under CC Attribution-NonCommercial 4.0 International according to these terms

Version 1.0 - published on 01 Jan 2024 doi:10.25334/ZVG7-2F67 - cite this

Description

Within this QUBES resource, you will find:

1) Two introductory videos and their associated PowerPoint presentations. These have been recorded by the lesson authors and cover (a) how logjams influence channel morphology, and (b) the adaptations that aquatic macroinvertebrates possess for living in different habitats. You may choose to present these videos as they are to your students or adapt the information contained in them to your own needs.

2) The full "Microhabitats and macroinvertebrates: Logjam influences on stream morphology and macroinvertebrate traits" lesson writeup

3) The datasheet associated with this lesson for use by students in the field.

Cite this work

Researchers should cite this work as follows: