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Ecological Relationships

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Unit 2 Lecture 2 Ecology Ecology - the relationship between an org and its environment Includes relationships between biotic and other biotic factors biotic and ... – PowerPoint PPT presentation

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Title: Ecological Relationships


1
Ecological Relationships
  • Unit 2 Lecture 2

2
Ecology
  • Ecology -
  • the relationship between an org and its
    environment
  • Includes relationships between
  • biotic and other biotic factors
  • biotic and abiotic factors

3
Important Concepts
  • Habitat
  • where an org lives
  • tree, lake, burrowetc
  • Niche
  • what an org does
  • making dams, eat-ing certain orgs, etc.
  • EVERYTHINGit does, basically.

4
Biotic ? Biotic Relationships
  • Symbiosis a relationship between 2 orgs
  • three types that we will cover
  • mutualism benefit-benefit
  • often referred to as simply symbiosis, but you
    must use the more specific term
  • commensalism benefit-unaffected
  • parasitism benefit-harm

5
Discuss
  • Come up with 2 examples of each of the symbiotic
    relationships
  • mutualism benefit-benefitcommensalism
    unaffected-benefitparasitism harmed-benefit

6
Biotic?Biotic contd
  • Other Non Symbiotic Relationships
  • Predator-Prey
  • one org feeds off of the other
  • Competition
  • organisms compete for the same resources

7
Food Chains Food Webs
  • Do Not list humans, decomposers, or scavengers.
  • detritovore feeds off of detritus dead or
    decaying organic matter decomposers/scavengers
  • Food Chain a linear representation of feeding
  • chains are linear a single line
  • ex

8
Food Chains Webs contd
  • Food Web a branched often interconnected
    representation of feeding
  • webs have many branches and interconnections
  • ex

9
Descriptive Org Terms
  • Autotroph an organism which makes its own food
  • auto- self
  • troph nutrients / food / feeder
  • aka producer
  • examples?

10
Descriptive Org Terms contd
  • Heterotroph cannot make its own food, feeds off
    of other organisms
  • hetero different
  • aka consumer
  • vore terms carnivore, omnivore, herbivore,
    detritovore/decomposer

11
Discuss
  • What do each of these vore terms mean?
  • carnivore
  • omnivore
  • herbivore
  • detritovore

12
Descriptive Org Terms contd
  • decomposer obtains nutrients by breaking down
    decaying organic matter
  • organic any substance containing the element
    Carbon

13
Sequence Terms for Consumers
  • Used in food chains or food pyramids for
    CONSUMERS, NOT in food webs. You may use either
    of the given terms.
  • Primary aka First Order consumers
  • eats the producer
  • herbivore or omnivore
  • Secondary aka Second Order consumers
  • eats the primary/1st order consumer
  • omnivore or carnivore

14
Sequence Terms contd
  • Tertiary aka Third Order consumer
  • eats secondary / 2nd order consumer
  • carnivore or omnivore
  • Quaternary aka Fourth Order consumer
  • eats tertiary / 3rd order consumer
  • carnivore or omnivore
  • etc

15
Terms in Chains Pyramids
  • Top Predator
  • an animal with has no natural enemies
  • will always be final step in food chain / pyramid
  • NOT all pyramids chains have a top predator
  • HUMANS ARE NOT TOP PREDATORS

16
Discuss / Complete
  • Fill in 4 on your sheet using the terms you
    just learned in s 1-3.sequence terms, vore
    terms, and the rest

17
Check Your Work!
Producer Autotroph
Heterotroph 1st Order Consumer Primary
Consumer Omnivore
Heterotroph 2nd Order Consumer Secondary
Consumer Carnivore
Heterotroph 3rd Order Consumer Tertiary
Consumer Carnivore Top Predator
18
Energy/Food Pyramids
  • Energy Pyramid a pyramid-shaped representation
    of a food chain
  • shows the transfer of energy btw organisms
  • only 10 of the energy taken in is passed on to
    the next trophic level
  • 90 of energy taken in is lost used for fuel for
    the bodys actions and for bodys reactions

19
Energy/Food Pyramids
  • Energy Pyramid a pyramid-shaped representation
    of a food chain
  • trophic level a nutrient/food level troph
  • each step in a food chain, web, or energy
    pyramid is a new trophic level
  • a pyramid will have as many levels as the food
    chain it represents

20
Energy/Food Pyramids
  • the terms used to describe orgs on the food chain
    are also used for each trophic level here.
  • as available energy decreases, the number of
    organisms circle one also decreases /
    increases.

21
Homework
  • Complete the Food Chains, Food Webs Food
    Pyramids worksheet found on pages 6-7 in your
    packet.
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