Redwood (Sequoia sempervirens) 1 Chapter 12 – Life Histories.

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Presentation transcript:

Redwood (Sequoia sempervirens) 1 Chapter 12 – Life Histories

4

3 2 Lifespan: 2,000 Yrs Seed Production: Millions

Pacific Salmon

Salmon: Anadromous 10

11 12 Lifespan: 2-7 Years Egg Production: Thousands

8 Mayfly Hatch

7 Mayfly (Adult) 9 Adult Lifespan: One Day Egg Production: Hundreds

Lifespan: 2000 Years Seed Production: Millions Lifespan (Adult): 1 Day Egg Production: Hundreds Lifespan: 2-7 Years Egg Production: Thousands

Life History Traits Study of Adaptations that Influence … Reproductive Output Size of Offspring Growth Rate Age at Reproductive Maturity Competitive Ability Life Span

Available Energy is Limited 1314

A) OFFSPRING NUMBER VERSUS SIZE LIFE HISTORY CHARACTERISTICS 15 16

Life History Patterns Fig in Molles 2006

Fig in Molles 2007 Life History Patterns

18 Fig in Molles 2006

Fig in Molles 2006 Life History Patterns

B) Adult Survival and Reproductive Allocation LIFE HISTORY CHARACTERISTICS 1 2

Fig in Molles 2006 Life History Patterns

Fig in Molles 2006

24 Life History Classification

3 4 Age at first Reproduction: 3-4 years Age at First Reproduction: 7 years REPRODUCTION

GROWTH RATE

8 COMPETETIVE ABILITY

5 6 LIFESPAN

Available Energy is Limited

Table 12.1 in Molles 2006 r versus K Selection

R selectedK selected “Small and Fast”“Large and Slow” MacArthur and Wilson 1967 (Birds, Insects) Pianka 1970, 1972 (Lizards) “Frequent Disturbance”“Infrequent Disturbance”