Lecture 26

Question 1

Biological community

Answer 1

Populations of organisms in a prescribed area or habitat

Question 2

Species richness

Answer 2

Number or species in a community

Question 3

Species evenness

Answer 3

Relative abundance or species

Question 4

Diversity Index- Shannon Wiener Index

Answer 4

H=-£pílnpí

Pí=proportion of species í in total sample

Question 5

Keystone species

Answer 5

Species with disproportionate effect on diversity relative to biomass

Question 6

Succession

Answer 6

Replacement of populations of habitat through a stable state

Question 7

Primary succession

Answer 7

Creation of new habitat

Ex) lava flow, glaciation, sand dunes

Question 8

Intermediate disturbance hypothesis

Answer 8

Species diversity will be highest at intermediate levels of disturbance

Question 9

Food web

Answer 9

Community portrait based on feeding relationships

Question 10

Tropic level

Answer 10

Feeding position within food web

Question 11

Primary produce-herbivore-primary consumer- 3°consumer

Answer 11

J

Question 12

Indirect effects

Answer 12

Interaction between 2 species altered by 3rd species