MODULE 7 – STREAMS, SPRINGS, AQUATIC ECOSYSTEMS

Timing: Early May | Est. Study Time: 4–5 hours

Overview

The Ozarks are defined by their extraordinary water systems — clear, cold springs, cave-fed streams, and gravel-bedded rivers teeming with native fish and invertebrates. Spring is a critical season for aquatic reproduction and productivity. This module explores Ozark aquatic ecology from headwater springs to large rivers.

Topics Covered

•       Karst hydrology: springs, caves, and the groundwater connection

•       Stream ecology: riffles, pools, and runs as distinct habitats

•       Native fish of the Ozarks: Smallmouth Bass, Ozark Cavefish, Darters, Redhorse

•       Benthic macroinvertebrates as indicators of water quality

•       Riparian vegetation and its role in stream health

•       Spring spawning ecology of Ozark fish

•       Threats to Ozark streams: sedimentation, agricultural runoff, and invasive species

Activities & Assessments

•       Video Lecture: Ozark Waters — Life in Clear Streams (50 min)

•       Virtual Lab: Identify 10 macroinvertebrates from underwater photo samples and assess water quality

•       Reading: Current state of Ozark native fish conservation

•       Field Journal Prompt: Find a stream, spring, or pond near you. What do you notice about the water, banks, and life?

•       Optional Field Trip: Wade a gravel-bedded stream and look for fish, crayfish, and aquatic insects