Basic Ecology Community Interactions Topics *1011 *1012 *1019

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Basic EcologyCommunity InteractionsTopics 1011
1012 1019

• Ms. Morris

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Interactions Within a Community

• Food Chains Food links between living
  organisms in a community
• Food Webs Intertwined food chains

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Food Chain
Image www.cas.psu.edu
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Food Web
Image www.bigelow.org
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Diets

• Herbivore Only eat vegetative material
• Deer, cattle, rabbits
• Carnivore Only eat meat material
• Lions, wolves, cats
• Omnivore Eats both meat and vegetative material
• Bears, pigs, humans

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Herbivore
Carnivore
Omnivore
Images en.wikipedia.org
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What do teeth have to do with it?
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Herbivore

• Image www.skullsite.co.uk

Female Red Deer - Cervus elaphus
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Omnivore

• Image www.skullsite.co.uk

                                                                           
Kinkajou - Potos flavus
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Carnivore
Image www.skullsite.co.uk
Cougar Felis concolor
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Interactions Within a Community

• Producers Photosynthetic organisms meaning?
• Autotrophs
• ALL PLANTS!!
• Not fungi (mushrooms)
• Consumers Rely on producers or another consumer
  for food
• Heterotrophs
• Different levels
• Primary
• Secondary
• Tertiary

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Interactions Within a Community

• Decomposers Break down dead organic matter
• Not only feeds them, but releases nutrients into
  the environment to start cycle again
• Fungi (mushrooms)
• Maggots
• Worms

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Whats missing on this diagram? Where do they fit
in?
Image www.anselm.edu
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Energy Flow

• 1st Law of Thermodynamics Energy can be neither
  created or destroyed
• 2nd Law of Thermodynamics When energy is
  converted from one form to another, energy is
  always lost (used)

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Less energy available to each trophic level
Image www.mhhe.com
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Why is energy lost at each level?
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Biomass How much matter does it take to feed
each species
Image www.bbc.co.uk
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Questions

• Give two NEW (dont use the ones I gave) examples
  of each
• Herbivore
• Carnivore
• Omnivore
• Explain what would happen if there were no
  decomposers on Earth
• What happens to energy at each tropic level?
• Turn in to Ms. Morris by the end of the day (10
  Points)