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BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
BIOL 101 Chp 53: Population Ecology
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BIOL 101 Chp 53: Population Ecology

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This is a lecture presentation for my BIOL 101 General Biology I students on Chapter 53: Population Ecology. (Campbell Biology, 10th Ed. by Reece et al). …

This is a lecture presentation for my BIOL 101 General Biology I students on Chapter 53: Population Ecology. (Campbell Biology, 10th Ed. by Reece et al).

Rob Swatski, Associate Professor of Biology, Harrisburg Area Community College - York Campus, York, PA. Email: rjswatsk@hacc.edu

Please visit my website for more anatomy and biology learning resources: http://robswatski.virb.com/

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  • 1. Chapter 53 Population Ecology BIOL 101: General Biology I Rob SwatskiAssistant Professor of Biology HACC - York 1
  • 2. PopulationDynamics Population Density Dispersion Emigration Immigration 2
  • 3. Population SizeEstimations Extrapolation (indirect) Index of population size (direct) Mark-and- recapture 3
  • 4. 4
  • 5. Deaths BirthsImmigration Emigration 5
  • 6. Dispersion Clumped Uniform Random 6
  • 7. Clumped Dispersion7 Why?
  • 8. Uniform Dispersion8 Why?
  • 9. Random Dispersion9 Why?
  • 10. Type of Dispersion? 10
  • 11. Type of Dispersion? 11
  • 12. Type of Dispersion? 12
  • 13. Demographics Demography Birth & Death rates Life table Cohort 13
  • 14. Life Table 14
  • 15. 15
  • 16. 16
  • 17. Survivorship Curve 1,000Number of survivors (log scale) 100 Females 10 Males 1 0 2 4 6 8 1017 Age (years) = constant death rate
  • 18. Number of Survivors (log scale) 1,000 I 100 II 10 III 1 0 50 100 Percentage of Maximum Lifespan 18
  • 19. LifeHistory Age at maturityReproductive rate# of offspring per repro cycle 19
  • 20. 20
  • 21. Evolution & Life History Diversity Semelparity Iteroparity Species Species Big-bang Repeated reproduce reproducereproduction reproduction once & die many times 21
  • 22. What kinds of environments favor these two types of reproduction? 22
  • 23. KestrelRESULTSParents surviving the following winter (%) 100 Male Female 80 60 40 20 0 Reduced Normal Enlarged brood size brood size brood size (3-4 chicks) (5-6 chicks) (7-8 chicks) 23
  • 24. Dandelion24 Coconut palm
  • 25. Exponential Population Growth 8,000Elephant Population 6,000 4,000 2,000 0 1900 1920 1940 1960 1980 Idealized environment Year 25
  • 26. J-curve 2,000 Exponential growthPopulation Size (N) 1,500 Carrying capacity K = 1,500 S-curve Logistic growth 1,000 500 0 0 5 10 15 Number of Generations 26
  • 27. 1,000 Number of Paramecium/mL 800 600 400 200 0A 0 5 10 15Paramecium Time (days)Population in the Lab 27
  • 28. overshootNumber of Daphnia/50 mL 180 150 120 90 60 30 0 0 20 40 60 80 100 120 140 160 Time (days) A Daphnia Population in the Lab 28
  • 29. Types of Selection r-selection K-selectiondensity-independent density-dependent 29
  • 30. 30
  • 31. 31
  • 32. 32
  • 33. 33
  • 34. 34
  • 35. 35
  • 36. 36
  • 37. 37
  • 38. 38
  • 39. Density-Independent PopulationsBR and DR do not change with population density 39
  • 40. 40
  • 41. 41
  • 42. Density-DependentPopulations As population density increases… BR decreases DR increases 42
  • 43. Density-Dependent Factors Crowding Disease Competition Territoriality Predation 43
  • 44. 44
  • 45. Gannets 45
  • 46. 2,100 1,900 1,700 Number of Sheep 1,500 1,300 1,100 900 700 500 0 1955 1965 1975 1985 1995 2005 YearPopulation Dynamics 46
  • 47. 50 2,500 Wolves MooseNumber of Wolves Number of Moose 40 2,000 30 1,500 20 1,000 10 500 0 0 1955 1965 1975 1985 1995 2005 Year 47
  • 48. Snowshoe Hare & Lynx 48
  • 49. Boom-and-Bust Cycles Snowshoe hare 160Number of Hares Number of Lynx (thousands) (thousands) 120 9 Lynx 80 6 40 3 0 0 1850 1875 1900 1925 Year 49
  • 50. Credits by Rob Swatski, 2010 Visit my website for more Anatomy study resources! http://robswatskibiology.wetpaint.com http://www.flickr.com/photos/rswatskiPlease send your comments and feedback to: rjswatsk@hacc.eduImages used in this work bear a This work bears an Creative Commons license and Attribution-Noncommercial are attributed to their original Share Alike Creative authors. Commons license. 50

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