3.2

Question 1

Ecological Succession

Answer 1

sequence of community changes, transition in species composition over time

Question 2

Primary succession vs Secondary Succession

Answer 2

primary=first, begins with lifeless area without soil secondary=already existing community is cleared but base soil is still intact

Question 3

Pioneer species

Answer 3

first species to colonize an area

Question 4

Climax Community

Answer 4

end result, balance within species and environment

Question 4

Species richness (R)

Answer 4

number of different types of species. Higher number=more richness, more diverse

Question 4

Seral Stages

Answer 4

stages of transition in development between pioneer community and climax

Question 5

Species evenness (E)

Answer 5

abundance/proportion of species. Closer to 1 more even

Question 6

Genetic diversity (H)

Answer 6

variation in a species, often related to pop. size. Combination of events and richness. Higher number=more diverse

Question 7

what leads to more biodiversity

Answer 7

higher species richness and diversity index, evenness close to 1.

Question 8

Keystone species vs Invasive species

Answer 8

Keystone species=native species, influential ecological role
Invasive species=reduce diversity, out compete native (keystone) species

Question 9

Examples of what would lead to primary succession

Answer 9

melting glaciers. volcanic eruption

Question 10

Examples of what would lead to secondary succession

Answer 10

logging a wooded area, major flooding of a creek bed