Aquatic Ecosystem Quiz

What is the term for organisms that are found in the water and can only be seen with a microscope?

• Microbes

• Kingfisher

• Cranefly

• Terrestrial insects

Which of the following is a primary consumer in the Pacific Northwest salmonid community?

• Juvenile salmonid

• Adult trout

• Sculpin

• Chironomid

What is the term for organic matter that originates from outside the ecosystem?

• Allochthonous organic matter

• Caddisfly

• Blackfly

• Periphyton (biofilm)

Match the following plants to their designations in a riparian zone?

• None

• (Sig)

• Non-Native

• (FF)

• First Foods

• (CS)

• Culturally Significant

• (NN)

What is the optimal temperature range for most native fish in the aquatic ecosystem?

• 20-25°C / 68-77°F

• 13-20°C/55-68°F

• 5-13°C/41-55°F

• Above 25°C/77°F

What is the minimum dissolved oxygen requirement for salmon embryos?

• 8 ppm

• 7 ppm

• 6 ppm

• 11 ppm

Which pH level is considered neutral?

• pH 1

• pH 5

• pH 7

• pH 10

What does electrical conductivity measure in water?

• Water's ability to conduct heat

• Water's ability to conduct electricity

• Water's ability to absorb light

• Water's ability to dissolve minerals

What is the maximum long-term ammonia level allowed by EPA in freshwater?

• 1.9 mg TAN / L

• 2.5 mg TAN / L

• 3.2 mg TAN / L

• 4.0 mg TAN / L

Which organism is most sensitive to high ammonia levels in freshwater?

• Freshwater mussels

• Salmonids

• Crayfish & Pond Snails

• Bass