Freshwater Recap

Which of the following is NOT a characteristic ecologists use to classify aquatic ecosystems?

• Depth

• Proximity to human populations

• Salinity

• If it's flowing or standing

Saltwater has a salinity....

• of 0.5 ppt or less

• between 0.5 - 30 ppt

• between 30 - 50 ppt

Freshwater has a salinity....

• of 0.5 ppt or less

• between 0.5 - 30 ppt

• between 30 - 50 ppt

Tags

NGSS.MS-ESS2-4

Brackish water has a salinity....

• of 0.5 ppt or less

• between 0.5 - 30 ppt

• between 30 - 50 ppt

Tags

NGSS.MS-ESS2-4

This zone is the top layer of an aquatic ecosystem where there is enough sunlight for photosynthesis

• Benthic

• Photic

• Aphotic

Tags

NGSS.MS-LS1-6

This zone is below the photic zone of an aquatic ecosystem where sunlight cannot penetrate

• Benthic

• Photic

• Aphotic

Tags

NGSS.MS-LS2-3

This zone is the very bottom of an aquatic ecosystem where it can be dark OR light

• Benthic

• Photic

• Aphotic

If you were an aquatic organism, what would you depend on to breathe? (molecule, not structure)

As depth increases in aquatic ecosystems, temperature will (increase/decrease)

A pond is an example of _____________ water

• Standing

• Flowing