Ecosystem dynamics (Unit 3, Topic 2)

Question 1

Feeding relationships within a community

Answer 1

Food web

Question 2

Convert simple inorganic chemicals into complex organic molecules. Most use solar radiation as their energy source

Answer 2

Producers

Question 3

Use food produced by other organisms as their energy source

Answer 3

Consumers

Question 4

Obtain their nutrients by ingesting and digesting the nutrients in detritus (undigested food and dead organisms) internally

Answer 4

Detrivitivore

Question 5

Externally digest detritus with enzymes, before absorbing nutrients directly into their cells

Answer 5

Decomposers

Question 6

States that there cannot be two species competing for the same resources while stably co-existing with one another

Answer 6

Competitive exclusion principle

Question 7

Are those which influence their communities in a way that is not proportional to their abundance

Answer 7

Keystone species

Question 8

Refers to the total amount of organisms that a region can sustain without environmental degradation. This is greatly determined by biotic and abiotic factors, as they influence both the ecosystem and all organisms living within it

Answer 8

Carrying capacity