1 / 12

Chapter 36: Population Ecology

This chapter delves into the fundamental concepts of population ecology, focusing on population density, dispersion patterns, and growth models. It examines how population size is distributed within different environments and introduces life tables and survivorship curves. The exponential and logistic growth models are explained, including how carrying capacity and density-dependent factors influence population dynamics. Additionally, the chapter covers sustainable resource management practices and the concept of demographic transition, highlighting the ecological footprint and its implications for resource consumption. ###

hadassah-lawrence
Télécharger la présentation

Chapter 36: Population Ecology

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 36: Population Ecology

  2. Population density • The # of individuals of a species per unit area or volume • Dispersion pattern: the way individuals are spaced within an area • 1. clumped dispersion: grouped in patches

  3. Dispersion patterns Uniform dispersion: distributed evenly Random distribution: spaced unpredictably

  4. Life Tables • Track survivorship • Survivorship curves: plot survivorship as a proportion of individuals from an initial population that are alive at each age • 3 types: I, II, and III

  5. Exponential Growth model • An idealized picture of unregulated population growth- a J curve • G=rN • G- growth rate • R-the max capacity of members of that population to reproduce • N-population size

  6. Logistic growth model • Description of idealized population growth that is slowed by limiting factors as population size increases- S shaped curve

  7. Carry capacity • Maximum population size that an environment can sustain

  8. Density dependent • Population growth decreases as density increases • Competition • Availability of space • Predation • Weather • Environmental factors

  9. Boom and Bust • Boom: rapid exponential growth • Bust: population falls back to normal levels

  10. Sustainable Resource Management • Harvest crops without damaging the resource • Maximum sustained yield: harvesting should be done at a level that produces a consistent yield without forcing a population decline

  11. Demographic Transition • A shift from 0 population growth where birth and death are = to 0 population growth where there is are low birth and death • Age structure: # of individuals in different age groups

  12. Ecological footprint • An estimate of the amount of land required to provide the raw materials an individual or nation consumes

More Related