Lecture 7 Flashcards Preview

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Flashcards in Lecture 7 Deck (23):
1

How do predators influence a community

they reduce herbivor populations which can lead to plant growth

2

Species in a guild

Share a resource

3

Species in a functional group

process resources in a similar manner Fix n2

4

Plants into three groups

Competitors
Ruderals
Stress tolerators

5

Competitors (plants)

Monopolize resources

6

Ruderals (plants

Disturbed environments Invest in reproduction

7

Stress- tolerators

Difficult environments - Long lived , Conserve resources

8

Diversity is influenced by

Species richness and species evenness

9

Alpha Diversity

Diversity within a community

10

Beta Diversity

Between-habitat diversity (uniqueness of species

11

Gamma Diversity

Landscape diversity

12

Keystone Species

Have a disproportionately large effect on community structure relative to abundance

13

Foundational species

have stronger role in community based on their numbers.

14

Competitive exclusion

One out competes the other

15

Competitive release

A species can spread out when competitor eliminated.

16

Exploitation Competition

When two species grow together the carrying capacity is reduced for both species, compared to pure populations

17

Fundamental niche

Full range of environmental tolerances

18

Realized niche

range of tolerance restricted by other species

19

Intermediate Disturbance Hypothesis (IDH)

Species richness is the highest at intermediate levels on disturbance

20

High levels of disturbance

many species fail to get established

21

Low disturbance

competitively superior species suppress others

22

Resource control or bottom up

Consumer abundance determined by food limitation

23

Consumer control or top down

Abundance of species limited by consumers