ECOLOGY FOR FINAL

Card Set Information

Author:
tjtolman
ID:
151243
Filename:
ECOLOGY FOR FINAL
Updated:
2012-04-30 19:00:55
Tags:
bio
Folders:

Description:
ecology
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user tjtolman on FreezingBlue Flashcards. What would you like to do?


  1. population:
    large group, one species in 1 time and 1 place (interbreed)
  2. Community:
    all populatin in a location, living together
  3. Ecosystem:
    community plus environment
  4. Ecology:
    interactions btwn organisms, and btwn organisms and envrionment
  5. Environment:
    • abiotic - living factors and
    • biotic - non living factors
  6. habitat:
    location
  7. niche:
    role of organism in environment
  8. biome:
    on scale of earth - communities of a particular type
  9. Characteristics of populations:
    • 1)population size
    • 2)arrangment of organisms
    • 3)density of population
  10. Population size:
    • birth rate - # of offspring per female per time
    • death rate
    • immigration and emigration
    • -if population is small= this is bad, reduced genetic variabilty, chance of extinction
  11. arrangment of organisms:
    • clumped
    • uniformly spaced
    • random spacing (least common)
  12. Population growth:
    • 1) exponential growth - cant go on forever
    • 2) logistic growth - "sigmoid growth"
    • k= carrying capacity of environment
    • k/2 harvesting population "optimal harvest population"
  13. Demography:
    • statistical analyze about population
    • -statistics about pop- births, deaths, marriage etc...
    • summary of statistics "life table"
    • *see handout
  14. Survivorship curve:
    • cohort- original group
    • "proportion of individuals surviving" - common variable used.
    • Type I: humans
    • type II: birds
    • type III: fish, insects
  15. Birth data from survivors:
    gather birth data, calulate pop. growth, overall from survivor data and birth data.
  16. Doubling time:
    • time it will take a population to double.
    • -How young, birth #rs, freq...
  17. Human pop. growth:
    • growing exponentially
    • why so rapid:
    • 1) increased earth's carrying capacity
    • 2) Expanded into more habitats
    • 3) removed limiting factors (reduced diseases)
    • -cant go on forever (resources must double as well)
  18. Commuinity ecology:
    INTERACTIONS
  19. symbiotic interactions:
    • (symbiosis)
    • -living together or less permanently, of 2 or more diff kinds of organisms (species)
    • a)commensalism
    • b)parasitism
    • c)mutualism
  20. commensalism:
    • One species benefits and the other is neutral
    • epiphytes and tree (tree is neutral)
    • marine passengers (benefit)
  21. parasitism:
    • parasite benefits
    • host - does not benefit
    • endoparasites: tapeworm *inside
    • ectoparasites: leech, ticks, mistletoe
  22. mutualism:
    • both species benefit
    • nitrogen fixing bacteria and members of pea family
    • seed dispersal-- some cases
    • polinators and plants
    • mycrorrhizae - root/fungus relationship
  23. Keystone species:
    • huge affect on community (beavers)
    • ants and plants - BOOK
  24. Competition:
    • interaction between organism of same or diff. species for required by limited resources
    • Intraspecific- between
    • interspecific - within
    • Animals:
    • Plants:
  25. Niche:
    functional role of organism in community
  26. fundemental niche:
    no other competitive species present
  27. realized niche:
    niche w/ competitive species present
  28. Gaus'es principle:
    • "Gause's competitive exclusion principle"
    • -only 1 species can occupy a particular niche @ a particular time. (The other goes extinct if they do try to do so)
    • lab - paramecium - consitent w/ gaue's principle
    • Nature: new england warblers' 5 species shown in pic
    • -not sharing niche (each has their own)
  29. character displacement:
    • beak size dictates size of food
    • can live in same envrionment if beak size is diff.

What would you like to do?

Home > Flashcards > Print Preview