3.3 Study Guide

Question 1

Ecological Sussecion

Answer 1

sequence of community changes

Question 2

Primary succession

Answer 2

Begins on virtually lifeless area, pioneer species

Question 3

Secondary succession

Answer 3

Comes after primary secession has climaxed and died, often after natural disasters

Question 4

Pioneer species

Answer 4

Start primary succession, bacteria, lichen, moss

Question 5

Seral stages

Answer 5

stages in between, other life and species form/grow

Question 6

Climax community

Answer 6

Community at its peak, healthiest, diverse

Question 7

Species Richness

Answer 7

of species in community

Question 8

Species Evenness

Answer 8

of each kind of species in a community

Question 9

Genetic Diversity

Answer 9

Related to the size of pop., determines vulnerability to change and disease

Question 10

Ecological Diversity

Answer 10

range of habitat types, variations

Question 11

Keystone species

Answer 11

Species necessary for community to survive, helps other species

Question 12

Invasive Species

Question 13

What’s the difference between primary and secondary succession?

Answer 13

Primary starts with no species there, pioneer species start with very unfertile soil. The secondary comes after the primary has hit its climax and died.

Question 14

How do keystone and invasive species affect biodiversity?

Answer 14

Keystone species help keep it diverse, more of each species. Invasive species destroy the diversity and out-compete the native species.

Question 15

What’s H for this data?

1 40
2 40
3 40
4 40
5 40

Answer 15

H=1.61

Question 16

What happens when a species has a high H? Low?

Answer 16

If they have a high H, then they are more diverse and can handle change better. Low H is the opposite.