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PAP Bio 9/5-6 WU Finish experimental design/ set up Eco II PP HW : no change

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PAP Bio 9/5-6 WU Finish experimental design/ set up Eco II PP HW : no change. Ecology. Energy Flow. Autotrophs are producers , they can synthesize their own organic nutrients. They can do this by photosynthesis or chemosynthesis.

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PowerPoint Slideshow about 'ecology' - Mercy


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PAP Bio 9/5-6

  • WU
  • Finish experimental design/ set up
  • Eco II PP
  • HW: no change
ecology
Ecology

Energy Flow

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Autotrophs areproducers, they can synthesize their own organic nutrients.
  • They can do this by photosynthesis or chemosynthesis.
  • Chemosynthetic bacteria get energy and raw materials from vents called "smokers" on the ocean floor.
  • Tube worms rely upon the bacteria that coexist with them to make food at the bottom of the ocean.
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Heterotrophsare consumers, they must consume preformed organic nutrients synthesized by other organisms.

"I MUST BE A HETEROTROPH, I CAN\'T SYNTHESIZE THESE !!"

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Examples of heterotrophs:
  • Saprophytes are decomposers they eat dead or decaying material. Examples are mushrooms and bacteria of decay.
  • Scavengers – eat carrion
  • Herbivores- eat plants
  • Carnivores- eat meat
  • Omnivores- eat both plants and meat
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SYMBIOSIS means "living together"
  • Types of Symbiosis
  • parasitism: the parasite benefits at the expense of the host
  • mutualism: both organisms benefit from the association
  • commensalism: one organism is benefited and the other is unharmed
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A food chain indicates the transfer of energy from producers through a series of organisms which feed upon each other
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The algae and plants are the producers.
  • The aquatic crustaceans are primary consumers – they eat the producers.
  • Fish are secondary consumers – they eat the primary consumers.
  • The raccoons represent a 3rd level of consumer.
food webs
Food Webs
  • A food web is a series of interrelated food chains which provides a more accurate picture of the feeding relationships in an ecosystem, as more than one thing will usually eat a particular species.    
trophic levels
Trophic Levels
  • An energy pyramid provides a means of describing the feeding and energy relationships within a food chain or web.   
  • Each step of an energy pyramid shows that some energy is stored in newly made structures of the organism which eats the preceding one.  
  • The pyramid also shows that much of the energy is lost when one organism in a food chain eats another.   Most of this energy which is lost goes into the environment as heat energy.
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or tertiary

  • Producer organisms represent the greatest amount of living tissue or biomass at the bottom of the pyramid.  
  • The organisms which occupy the rest of the pyramid belong to the feeding levels indicated in each step. 
  • On average, each feeding level only contains 10% of the energy as the one below it, with the energy that is lost mostly being transformed to heat. 
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