Unit Review

Question 1

Fish egg

Answer 1

Deposition into spawning grave. Need water flow to supply oxygen

Question 2

Alevin

Answer 2

Survive by hiding and using nutrients from yolk sac

Question 3

Fry parr

Answer 3

Have bar marking for camo

Question 4

Smolt

Answer 4

Dark on back and silver on bottom of body

Question 5

Adult

Answer 5

Large, live in open ocean

Question 6

How do bears contribute to ecosystem during salmon run

Answer 6

Bears carry dead fish into the forest. They eat 25% of the fish. The rest of the salmon decomposes and becomes part of the the soil to help trees grow

Question 7

What’s the connection between salmon nitrogen and tree growth

Answer 7

By eating, salmon harvest nitrogen. Dead salmon are then brought to the forest floor where they decompose releasing nitrogen. The nitrogen then helps trees grow 3x faster

Question 8

Why is nitrogen so important for trees? How does it affect their growth?

Answer 8

Nitrogen has nutrients that helps trees grow. Nitrogen helps trees grow 3x faster

Question 9

How do trees help salmon

Answer 9

Trees help keep streams cool, produce insects that are good for fry, and prevents soil erosion(prevents eggs from suffocating)

Question 10

Define keystone species

Answer 10

It has a huge impact on other species in relation to its abundance. They help maintain biodiversity