MACROINVERTEBRATES OF CHERRY CREEK

WHY TEST MACROINVERTEBRATES?

• They are sensitive to changes in the ecosystem. Many live in an aquatic ecosystem for over a year. They cannot easily escape changes in the water quality. They can be collected very easily from most aquatic systems with inexpensive or homemade equipment.
• They are sensitive to changes in the ecosystem. Many live in an aquatic ecosystem for over a year. They cannot easily escape changes in the water They can be collected very easily from most aquatic systems with inexpensive or homemade equipment.
• They cannot easily escape changes in the water quality. .

STONEFLY

• n= 131
• Pollutant sensitive species

AQUATIC WORM

• n= 4
• Pollutant tolerant

DRAGONFLY LARVAE

• n=3
• Semi sensitive to pollutants

CADDISFLY

• n=5
• Semi sensitive to pollutants

DAMSELFLY

• n=4
• Semi sensitive to pollutants

MIDGE

• n=7
• Semi tolerant to pollutants

BLOODWORM MIDGE

• n=5
• Tolerant to pollutants

DOBSONFLY

• n=3
• Sensitive to pollutants

ALDERFLY

• n=2
• Sensitive to pollutants

RIFFLE BEETLE

• n=12
• Semi sensitive to pollutants

Untitled Slide

Untitled Slide

Ti

TV

MBI

• Macroinvertebrate biotic index
• Cherry creek value2.78
• Excellent

3 OUT OF 4 POLLUTANT SENSITIVE SPECIES FOUND