Lecture 2-Trophic Structure and Food Webs

Question 1

what does “I” stand for Herbivore ‘box’

Answer 1

= Food ingested

Question 2

what does “A” stand for Herbivore ‘box’

Answer 2

= Food assimilated through gut wall

Question 3

what does “W” stand for Herbivore ‘box’

Answer 3

=Food expelled as waste product

Question 4

in Efficiency of production what does P/A stand for

Answer 4

= Production efficiency

Question 5

in efficiency of production what does A/I stand for

Answer 5

= Assimilation efficiency

Question 6

what does protozoa mean

Answer 6

one-celled animals found worldwide in most habitats.

Question 7

what does Feeding guilds mean

Answer 7

are a group of functionally similar organisms within a tropic level, that fed on the same resources and in the
same way

Question 8

what are Keystone species

Answer 8

a species that has an effect on an
ecosystem out of proportion to its abundance or biomass

Question 9

whats an example of a keystone species

Answer 9

Antarctic krill (Euphausia superba)

Question 10

what is the difference between a dormant or a keystone species

Answer 10

A dominant species has a
high impact on a food
web, but has a large
biomass while A keystone species has a
high impact on a food
web, but has a relatively
small biomass

Question 11

what is the meaning of benthic

Answer 11

of, relating to, or occurring at the bottom of a body of water.