ecology 2

Question 1

Movement of matter versus energy

Answer 1

movement of matter is cyclic and movement of energy is linear in ecosystems

Question 2

Biomass

Answer 2

entirety of all biologically produced organic matter

Question 3

What are some forms of energy conversion?

Answer 3

Cellular respiration and light energy into chemical energy in photosynthesis

Question 4

Food chain

Answer 4

outlines who eats whom through a path of energy (contains levels: producers, primary, secondary, etc.)

Question 5

Food web

Answer 5

contains the whole system of connected food chains (arrows connecting all around)

Question 6

Why is the number of trophic levels limited?

Answer 6

10% rule. As the trophic levels move up, less of the original solar energy is stored at each level.

Question 7

3 reasons why energy decreases through trophic levels

Answer 7

The rest of the 90% of energy is 1. released into biosphere as heat 2. some biomass is not eaten (bones) 3. biomass is egested

Question 8

Unit of energy used for energy pyramids

Answer 8

kJ m^-2 y^-1

Question 9

What is FCR?

Answer 9

Food conversion ratio which measures animal’s efficiency in converting feed mass into desired input

Question 10

Primary succession

Answer 10

when plants and animals first colonize a lifeless area, no soil at beginning

Question 11

Secondary succession

Answer 11

happens when a community is impacted by a disturbance, soil is present at the beginning