Includes Insects Crustaceans Mollusks. Sensitive to Changes Cannot easily escape changes Collected...

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Includes • Insects • Crustaceans • Mollusks

Transcript of Includes Insects Crustaceans Mollusks. Sensitive to Changes Cannot easily escape changes Collected...

Page 1: Includes Insects Crustaceans Mollusks. Sensitive to Changes Cannot easily escape changes Collected very easily.

Includes

• Insects

• Crustaceans

• Mollusks

Page 2: Includes Insects Crustaceans Mollusks. Sensitive to Changes Cannot easily escape changes Collected very easily.

• Sensitive to Changes

• Cannot easily escape changes

• Collected very easily

Page 3: Includes Insects Crustaceans Mollusks. Sensitive to Changes Cannot easily escape changes Collected very easily.

What do macroinvertebrates do?

Job Example

• Predators dragonfly, damselfly, beetles

• Filter feeders mussels, fly larvae, midge larvae

• Scrapers snails, mayfly larvae

• Collectors worms, planarians

• Shredders amphipods, caddisfly larvae

Page 4: Includes Insects Crustaceans Mollusks. Sensitive to Changes Cannot easily escape changes Collected very easily.

Group A: Very sensitive to Environmental Stresses

Stoneflies Mayflies Caddisflies Dobsonflies Water penny

Group B: Somewhat sensitive to Environmental Stresses

Dragonflies Craneflies Damselflies Crayfish Scuds

Group C: Tolerant to Environmental Stresses

Midges Leeches Snails Pouch Snails Blackfly larva

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Conclusion:

• Freshwater organisms-the Biotic part of the Freshwater environment- have “Limits” or “Optimal ranges” in water quality where they prefer to live.

• The quality of water can be determined by what and how many organisms are living in that environment.

• Macroinvertebrates are used to evaluate the quality and history of the water environment.