Lecture 14

Question 1

Communities

Answer 1

groups of interacting species at the same place and time

Question 2

Subsets of species can be defined by:

Answer 2

taxonomic affinity
guild
functional group

Question 3

Guild

Answer 3

group of species that uses the same resources

Question 4

Functional group

Answer 4

species that function in similar ways, but with different resources

Question 5

Species richness

Answer 5

of species in a community

Question 6

Species evenness

Answer 6

relative abundances compared to one another

Question 7

Species diversity

Answer 7

combines species evenness and richness

Question 8

Rank abundance curve

Answer 8

plot the proportional abundance of each species relative to the others in rank

Question 9

Species composition

Answer 9

identity of a species in a community

Question 10

Species accumulation curve

Answer 10

species richness is plotted as a function of the total #of individuals that have been counted

Question 11

Trophic cascade

Answer 11

a consumer is indirectly facilitated by a positive interaction between its prey and a different species

Question 12

Competitive networks

Answer 12

competition between all species impacting them all negatively; hard for a single species to dominate

Question 13

Interaction Strength

Answer 13

magnitude of the effect of one species on the abundance of another

Question 14

Foundation Species

Answer 14

have large affects on other species, & thus diversity, by virtue of their considerable abundance or biomass

Question 15

Ecosystem engineers

Answer 15

create, modify, or maintain physical habitat for themselves & other species

Question 16

Keystone Species

Answer 16

have strong effects because of their role in the community, relative to their biomass/ abundance