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

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Presentation on theme: "Redwood (Sequoia sempervirens) 1 Chapter 12 – Life Histories."— Presentation transcript:

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

2 4

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

4 Pacific Salmon

5 Salmon: Anadromous 10

6 11 12 Lifespan: 2-7 Years Egg Production: Thousands

7 8 Mayfly Hatch

8 7 Mayfly (Adult) 9 Adult Lifespan: One Day Egg Production: Hundreds

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

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

11 Available Energy is Limited 1314

12 A) OFFSPRING NUMBER VERSUS SIZE LIFE HISTORY CHARACTERISTICS 15 16

13 Life History Patterns Fig in Molles 2006

14 Fig in Molles 2007 Life History Patterns

15 18 Fig in Molles 2006

16 Fig in Molles 2006 Life History Patterns

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

18 Fig in Molles 2006 Life History Patterns

19 Fig in Molles 2006

20 24 Life History Classification

21 3 4 Age at first Reproduction: 3-4 years Age at First Reproduction: 7 years REPRODUCTION

22

23 GROWTH RATE

24 8 COMPETETIVE ABILITY

25 5 6 LIFESPAN

26 Available Energy is Limited

27 Table 12.1 in Molles 2006 r versus K Selection

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


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