Class Notes (1,100,000)
CA (620,000)
UTSC (30,000)
Lecture 18

CLAB20 Lecture 18: Lecture19-2.pdf


Department
Classical Studies
Course Code
CLAB20H3
Professor
Steve Joordens
Lecture
18

This preview shows pages 1-3. to view the full 56 pages of the document.
19
Neutral Theory
&
Landscape Ecology
Chapter 23

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

Community Membership
There are three schools of thought what controls
community diversity:
Equilibrium theory—ecological and
evolutionary compromises lead to resource
partitioning.
Nonequilibrium theory—fluctuating conditions
keep dominant species from monopolizing
resources.
Neutral theory—species do not differ and
diversity patterns are a product of dispersal,
speciation and demographic stochasticity.
Speciation: the formation of new species as a result of geographic, physiological, anatomical, or behavioral factors that prevent previously interbreeding
populations from breeding with each other.
ability to predict if species can coexist. Using compromises of different resources to coexist.
disturbances and environmental fluctuations prevent species to exist in equilibrium.. Disturbance in environment keeps reseting
population sizes. Nature keeps things changing.
There are no species differences

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

Neutral Theories
Neutral theory can predict diversity patterns
even when all species are competitively
equivalent and use the same resources.
E.g., they have identical fitness
forest: likely to see many
different types of trees. They
all respond the same way to
the environment, or similar
fitness.
You're Reading a Preview

Unlock to view full version