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Published byMercy Singleton Modified over 6 years ago
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Study of interactions between organisms and their environments.
Ecology Study of interactions between organisms and their environments.
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Biotic Factors Biosphere – life-supporting layer of Earth
Biotic factors – all living organisms in a biosphere
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Abiotic Factors Nonliving factors in an environment Examples:
Air currents Temperature Moisture Light Soil
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Organization of Life Biosphere Ecosystems Communities Populations
Organisms
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Feeding Relationships
Autotrophs Heterotrophs Carnivores Omnivores Herbivores Decomposers
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Trophic Relationships
Autotrophs 1st level consumers (herbivores) 2nd level consumers 3rd level consumers 4th level consumers (top predators)
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RULE OF 10 Only 10% of energy is transferred from one trophic level to the next. Example: It takes 100 kgs of plant materials (producers) to support 10 kgs of herbivores It takes 10 kgs of herbivores to support 1 kg of 1st level predator
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Symbiosis – “living together”
Symbiosis Type Species A Species B Commensalism + (benefit) 0 (neutral) Mutualism Parasitism - (harmed)
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Water cycle Evaporation Transpiration Precipitation Runoff Groundwater
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Carbon cycle Combustion Photosynthesis Respiration Decomposition
Fossil fuels
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Nitrogen cycle Atmospheric nitrogen Runoff Fertilizers Decomposition
Nitrogen fixing Synthesis of amino acids
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