Food Chains and Energy Pyramids by Bibiene Pulles https://padlet.com/Bibi_fca4/hgty8zpjgwco Made by Bibi and Michelle en-us 2017-12-07 07:46:46 UTC 2023-05-06 14:16:52 UTC hello@padlet.com What are food Chains? Bibi_fca4 https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/213999619 Food Chains are a series of organisms which each depend on the next as a source of food. They show how each organism gets food, and how nutrients and energy are passed on from creature to creature. ]]> 2017-12-07 07:49:19 UTC https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/213999619 What are Energy Pyramids? Bibi_fca4 https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/213999674 An Energy Pyramid is a model that shows the flow of energy in a trophic, or feeding level to the net in an ecosystem. The different trophic levels represent the different groups of organisms that can compose a food chain. Starting from the bottom, going up-wards they are as follows:

  • Producers — bring energy from nonliving sources into the community
  • Primary consumers — eat the producers, which makes them herbivores in most communities
  • Secondary consumers — eat the primary consumers, which makes them carnivores but they can also be an omnivore
  • Tertiary consumers — eat the secondary consumers which makes them both carnivores and herbivores or omnivores.

]]> 2017-12-07 07:49:30 UTC https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/213999674 Consumers: Bibi_fca4 https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/214002588
  • 1° Consumers --> feed directly on Autotrophs (Herbivores)
  • 2° Consumers --> feed on 1° consumers (Carnivores/Omnivores)
  • 3° Consumers --> feed on 2° consumers (Carnivores/Omnivores)
  • etc...
    • ]]>     2017-12-07 08:03:41 UTC https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/214002588     Definitions: Bibi_fca4 https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/214003585
  • Herbivore --> feeds only on plants
  • Carnivore --> feed only on meat (flesh)
  • Omnivore --> feeds on both plants & meat
  • Decomposers --> organisms that feed on dead organic matter & decompose it
  • Detrivores --> feed on dead organic matter & digest it internally (they have a gut) 
    •         The large of dung beatles
    • Saprotrophs --> feed on dead organic matter & digest it externally (they don't have a gut), they digest by releasing digestive enzymes onto the dead organic matter & then absorbing the products of the digestion
            Bacteria and fungi
    • Autotrophs --> producers (organisms that are able to produce their own foods)
    • Heterotrophs --> consumers, organisms that feed on other organisms (living organisms or recently killed organisms)

    ]]>     2017-12-07 08:08:08 UTC https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/214003585     7 functions of life Bibi_fca4 https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/214005679
  • Nutrition (obtaining food for energy and the materials needed for growth)
  • Metabolism (a chemical reaction that takes place inside the cells)
  • Growth (irreversible increase in size)
  • Response (perceiving and reacting to a change in the environment)
  • Excretion (getting rid of waste products)
  • Homeostasis (maintaining a controlled environment)
  • Reproduction ( producing offspring either sexually or asexually)
    • ]]>     2017-12-07 08:18:42 UTC https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/214005679     Second Law of Thermodynamics michelle_tanner https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/214006141 Only 10% of the energy contained within a trophic level is transferred onto the next level. 90% is "lost".
    Why?
    1. Organisms may die before they can be consumed.
    2. Organisms use a lot of their energy for their own needs (for cell respiration) (for all 7 functions of life)
    3. Not all parts of an organism are consumed by the other organism that feeds on the other.
    4. Not all parts are digested.

    These 4 reasons contribute to the 90% loss of energy from one tropic level to the next]]>     2017-12-07 08:20:54 UTC https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/214006141     Cell Respiration Bibi_fca4 https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/214006252 Organic compounds (Sugars -> Glucose) (C6H12O6) + O2 -------->
    CO2 + H2O + ATP 
    • ATP --> used for the 7 functions of life, Energy in the form of ATP, ATP can be used readily by cells & organisms
    ]]>     2017-12-07 08:21:21 UTC https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/214006252     Limit Bibi_fca4 https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/214007995 THERE IS A LIMIT IN THE NUMBER OF TROPHIC LEVELS & THE LENGTH OF A FOOD CHAIN]]> 2017-12-07 08:28:47 UTC https://padlet.com/Bibi_fca4/hgty8zpjgwco/wish/214007995