Formore exams
Email;
Populus Part B: Density-dependent natural selection
1. MacArthur and Wilson (1967) - the ideas
2. Roughgarden (1971)- population-genetic model of the ideas
- Populations that often experience low N
(e.g., those with ephemeral resources)
fitness ~ rmax
- Populations that are often crowded (e.g.,
those in stable environments)
fitness ~ ability to survive and
reproduce though it’s crowded
IF Genotype
THEN rmax
K
Traits that increase rmax
Formore exams
Email;
1
, Formore exams
Email;
Ecology? Meet evolution. Population dynamics? Meet life-history traits and age-structure.
1. Density-dependent
natural selection is
the tip of the
evolutionmeets-
ecology iceberg.
5. Lessons: (1) life-history traits affect population dynamics
and evolve partly because they affect population dynamics;
(2) age-structure also affects population dynamics.
vital rates = Simpler things
Formore exams
Email;
2
Email;
Populus Part B: Density-dependent natural selection
1. MacArthur and Wilson (1967) - the ideas
2. Roughgarden (1971)- population-genetic model of the ideas
- Populations that often experience low N
(e.g., those with ephemeral resources)
fitness ~ rmax
- Populations that are often crowded (e.g.,
those in stable environments)
fitness ~ ability to survive and
reproduce though it’s crowded
IF Genotype
THEN rmax
K
Traits that increase rmax
Formore exams
Email;
1
, Formore exams
Email;
Ecology? Meet evolution. Population dynamics? Meet life-history traits and age-structure.
1. Density-dependent
natural selection is
the tip of the
evolutionmeets-
ecology iceberg.
5. Lessons: (1) life-history traits affect population dynamics
and evolve partly because they affect population dynamics;
(2) age-structure also affects population dynamics.
vital rates = Simpler things
Formore exams
Email;
2
