LAB__10_-_Ecology

LAB__10_-_Ecology - some insects • parasites FOOD...

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ECOLOGY the study of the interactions among living organisms, and between organisms and their environment environment has abiotic factors (water, sunlight, oxygen, temp., soil and climate) and biotic factors (other organisms that share that same habitat)
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Levels of organization Population – a group of individuals of the same species occupying a given area (habitat) at a given time Biocoenosis – biological community, or community of species; all the interacting organisms living together in a specific habitat or biotope Ecosystem – community + environment Biosphere – total sum of living organisms (“biomass” or “biota”) coral reef – marine ecosystem
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Examples of different FOOD WEBS
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Different Trophic Levels of Consumers 1º consumer – herbivore 2º consumer – carnivore 3º consumer – carnivore, omnivore decomposers or saprobes (fungi , bacteria and protists,
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Unformatted text preview: some insects) • parasites FOOD CHAIN (just one path of energy) FOOD WEB (everything is connected!) Food Chain vs. Food Web FOOD CHAINS • Producers – autotrophic • Consumers – heterotrophic • Plant only captures 1% of the energy from sunlight (and transforms it to ATP). • Each feeding (trophic) level passes ~10% of its stored energy to the next level. Flow of energy through an ecosystem Ecological pyramid describes the flow of energy between trophic levels of an ecosystem. Survivorship curves Type I : humans Type II : corals, squirrels, reptiles, honey bees, birds, fish Type III : oysters, sea urchins, plants (percent of life span) Activities: 1. Food web 2. Flow of E through an ecosystem 3. Dice survivorship (#1 – heart disease, and #2 – cancer) 4. Soap bubble survivorship 5. Plot all survivorship curves...
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