keystone predator

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keystone predator
2014-04-24 00:49:06

keystone predator lab
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  1. group of species that live together and interact with each other
    ecological community
  2. the composition and relative abundance of the different types of organisms present
    community structure
  3. comprised of organisms living in the area covered by water at high tide and exposed to the air at low tide
    intertidal community
  4. where was the famous experiments conducted that our lab is based of and when
    • Washington state
    • 1960
  5. where do similar intertidal communities exist?
    pacific northwest from Oregon to British Columbia, CA
  6. what are we experimentally determining
    which species are competitively dominant over which others
  7. what will we be analyzing and making
    • gut contents
    • food web diagram
  8. what do removal experiments do?
    allow observation how species influences on the rest of the community
  9. progression of what eats what
    food chain
  10. eats both plants and animals
  11. diagram that connects different species and food chains together based on food chain relationships
    food web diagram
  12. pyramid representing ecosystems
    indicates species relative position in food chain
    tropic levels
  13. species that use energy from the sun to produce their own food
    • producers
    • lowest trophic level
  14. order of tropic levels, bottom to top
    • producers
    • herbivores
    • omnivores
    • predators
  15. when one species is better at holding space than another
    competitively dominant
  16. diagram that illustrates which species are superior competitors within a community
    competitive dominance hierarchy
  17. species that is more abundant in number or biomass than any other
    dominant species
  18. presence of single species controls community structure even if low abundance
    keystone species
  19. simulated intertidal community
    EcoBeaker models
  20. different species behave differently because they don't have the same "      " assigned for their rules
  21. 6 stationary species in the model
    • 3 algae
    • 3 filter feeders/sessile consumers
  22. set of probabilities that determine what happens from one time step to the next
    transition matrix
  23. 4 transition matrix probabilities
    • settling on top of bare rock
    • being replaced by each of the other species
    • dying
    • bare rock remaining bare
  24. 3 algae for lab
    • nori
    • black pine
    • coral weed
  25. represents number of individuals of each species present
    population size index
  26. Arrow points from weaker to strong competitors on this diagram
    competitive dominance hierarchy
  27. 3 sessile consumers
    • acorn barnacle
    • goose neck barnacle
    • mussel
  28. 3 other species
    • starfish
    • whelk
    • chiton
  29. organisms that are introduced to eliminate or otherwise limit population growth for unwanted pest species
    biocontrol agents
  30. what are biocontrol agents usually?
    • parasites
    • predators
    • pathogens