Communities

Question 1

Community

Answer 1

an assemblage of species living together in a particular area

Question 2

Zonation

Answer 2

distinct boundary, gradual boundary

Question 3

Dominant organisms

Answer 3

usually terrestrial

Question 4

Physical conditions

Answer 4

usually aquatic (except coral reef)

Question 5

Species richness

Answer 5

the number of species in a community

Question 6

Relative abundance

Answer 6

the proportion of individuals in a community represented by each species

Question 7

Species evenness

Answer 7

a comparison of the relative abundance of each species in a community

Question 8

Diversity

Answer 8

both richness and evenness

Question 9

Rank-abundance curve

Answer 9

a graph of the relative abundance of species living in a community in order from the most abundant to least abundant

Question 10

Species diversity is effected by….

Answer 10

resources, habitat diversity, keystone species, and disturbance

Question 11

Productivity

Answer 11

biomass of producers or consumers generated over time

Question 12

What makes the most productive community?

Answer 12

dominated by small numbers of dominant competitors

Question 13

Habitat diversity is important because

Answer 13

it causes higher species diversity

Question 14

Food chain

Answer 14

a linear representation of how different species in a community feed on each other

Question 15

Food web

Answer 15

a complex and realistic representation of how species feed on each other in a community

Question 16

Primary consumer

Answer 16

species that eats producers

Question 17

Secondary consumer

Answer 17

species that eats primarily consumers

Question 18

Tertiary consumer

Answer 18

species that eats secondary consumers

Question 19

Guild

Answer 19

within a given trophic level, a group of species that feeds on similar items

Question 20

Direct effect

Answer 20

an interaction between two species that does not involve others

Question 21

Indirect effect

Answer 21

an interaction between two species that involves one or more intermediate species

Question 22

Trophic cascade

Answer 22

indirect effects in a community initiated by a predator