Basic Ecology Community Interactions Topics *1011 *1012 *1019 Ms. Morris.
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Transcript of Basic Ecology Community Interactions Topics *1011 *1012 *1019 Ms. Morris.
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Basic EcologyCommunity Interactions
Topics *1011 *1012 *1019
Basic EcologyCommunity Interactions
Topics *1011 *1012 *1019
Ms. Morris
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Interactions Within a CommunityInteractions 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 WebFood Web
Image:
www.bigelow.org
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DietsDiets
• 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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Images:
en.wikipedia.org
Herbivore
Omnivore
Carnivore
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What do teeth have to do with it?
What do teeth have to do with it?
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HerbivoreHerbivoreImage: www.skullsite.co.uk
Female Red Deer - Cervus elaphus
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OmnivoreOmnivore
Kinkajou - Potos flavus
Image: www.skullsite.co.uk
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CarnivoreCarnivore
Cougar – Felis concolor
Image: www.skullsite.co.uk
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Interactions Within a CommunityInteractions 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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• Decomposers – Break down dead organic matter– Not only feeds them, but releases
nutrients into the environment to start cycle again
– Fungi (mushrooms)
– Maggots
– Worms
Interactions Within a CommunityInteractions Within a Community
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What’s missing on this diagram?
Where do they fit in?
Image: www.anselm.edu
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Energy FlowEnergy 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 levelLess energy available to each trophic levelImage:
www.mhhe.com
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Why is energy lost at each
level?
Why is energy lost at each
level?
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Biomass How much matter does
it take to feed each species
Biomass How much matter does
it take to feed each species
Image: www.bbc.co.uk
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QuestionsQuestions• Give two NEW (don’t 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)