Lecture 30: Ecosystems

Question 1

1. A limiting nutrient is:
   A. The element that must be removed for production to increase
   B. The element that must be added for production to increase
   C. The concentration of carbon required for production to increase
   D. None of the above

Answer 1

B. The element that must be added for production to increase

Question 2

2. Energy and nutrients pass from:
   A. carnivores > herbivores > autotrophs >detritivores
   B. detritivores > herbivores > autotrophs > carnivores
   C. herbivores > carnivores > autotrophs >detritivores
   D. autotrophs > herbivores > carnivores >detritivores

Answer 2

D. autotrophs > herbivores > carnivores >detritivores

Question 3

3. The limiting factors of NPP in terrestrial ecosystems:
   A. Light and nutrients
   B. Temperature and nutrients
   C. Temperature and water
   D. Light & temperature

Answer 3

C. Temperature and water

Question 4

4. The limiting factors of NPP in aquatic ecosystems:
   A. Light and nutrients
   B. Temperature and nutrients
   C. Temperature and water
   D. Light & temperature

Answer 4

A. Light and nutrients

Question 5

5. What is the typical efficiency of energy conversion
   from one trophic level to the next?
   A. 100%
   B. 50%
   C. 10%
   D. <1%

Answer 5

C. 10%

Question 6

An example of a consumer that derive their energy from detritus (a nonliving organic matter) would be?

Answer 6

Detritivores / Decomposers

Question 7

what connects all trophic levels?

Answer 7

Decomposition

Question 8

The total amount of photosynthesis (or Chemosynthesis) per unit area and time would be an example of…..

Answer 8

Gross Primary production (GPP)

Question 9

NPP (Net primary production) is the amount of ____ _______ added in a given time period.

Answer 9

Net Biomass

Question 10

A measure of total net biomass accumulation in an ecosystem during a given period is an example of….

Answer 10

Net Ecosystem Production (NEP

Question 11

An element that must be added for production to increase would be an example of?

Answer 11

The Limiting Nutrient

Question 12

________ and _________ are the nutrients that most often limit marine production

Answer 12

Nitrogen and Phosphorous

Question 13

Restoration Ecology seeks to initiate or speed up recovery of degraded ecosystems. what are the two key strategies?

Answer 13

Bioremediation
Augmentation

Question 14

using a variety of organisms like plants, bacteria and fungi to help clean up ecosystems that have been polluted by heavy metals, industrial waste, mining, toxins and even world war II would be an example of what ecological restoration strategies?

Answer 14

Bioremediation