LARC notes 2.pdf - Cradle to Grave Biogeochemical Cycles 4...

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Cradle to Grave Biogeochemical Cycles 4 spheres of earth Troposphere air Biosphere Living and dead organisms Hydrosphere water Lithosphere Crust Ecology: study of connections in nature How organisms interact with one another and their nonliving environment Consist of non living (abiotic) and living (biotic) components An ecosystem survives by a combination of energy flow and matter recycling Matter cycling Nutrient cycles: global recycling Global cycles recycle nutrients through the earth’s air, land, water, and living organisms Nutrients are the elements and compounds that organisms need to live, grow, and reproduce. Biogeochemical Cycles move these substances through air, water, soil, rock, and living organisms Expressed simply Where the chemical is stored The pathway along which it is transferred from one place to another What form the chemical matter is in (solid,liquid, gas) What are the factors or processes that control the ow? Carbon is energy Where is carbon stored Biomass, soil The bodies of living things Limestone rocks Volcanoes How is carbon released Combustion of fossil fuels Methane, sulfur, etc Burning of wood and biomass Decomposition of living things Radiative forcing: measure of the influence a factor has in altering the balance of incoming and outgoing energy in the earth atmosphere system
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