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Basic Ecology Community Interactions Topics *1011 *1012 *1019. Ms. Morris. Interactions Within a Community. Food Chains – Food “links” between living organisms in a community Food Webs – Intertwined food chains. Food Chain. Image: www.cas.psu.edu . Food Web. Image: www.bigelow.org.
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Basic EcologyCommunity InteractionsTopics *1011 *1012 *1019 Ms. Morris
Interactions Within a Community • Food Chains – Food “links” between living organisms in a community • Food Webs – Intertwined food chains
Food Chain Image: www.cas.psu.edu
Food Web Image: www.bigelow.org
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
Herbivore Carnivore Omnivore Images: en.wikipedia.org
Herbivore Image: www.skullsite.co.uk Female Red Deer - Cervus elaphus
Omnivore Image: www.skullsite.co.uk Kinkajou - Potos flavus
Image: www.skullsite.co.uk Carnivore Cougar – Felis concolor
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
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
What’s missing on this diagram? Where do they fit in? Image: www.anselm.edu
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)
Image: www.mhhe.com Less energy available to each trophic level
BiomassHow much matter does it take to feed each species Image: www.bbc.co.uk
Questions • 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)