Biogeochemical Cycles
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Transcript of Biogeochemical Cycles
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BiogeochemicalCycles
Mr. SkirbstLife Science
Topic 19
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Cycles
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CyclesDaily Rhythms
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CyclesDaily Rhythms
diurnal – active at day
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CyclesDaily Rhythms
diurnal – active at daynocturnal – active at night
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CyclesLunar Rhythms
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Cycles
Lunar Rhythmstides – high / lowmonthly cycles
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CyclesAnnual Rhythms
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CyclesAnnual Rhythms
seasonal changes
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CyclesAnnual Rhythms
seasonal changesmigration – annual
movement from breeding to feeding grounds
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CyclesAnnual Rhythms
seasonal changeshibernation – winter
resting state(Latin: hibernus – “winter”)
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CyclesAnnual Rhythms
seasonal changesestivation – summer
resting state(Latin: aestivus – “summer”)
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Cycles of MatterFlow of matter (chemicals) from non-living (abiotic) to living (biotic) parts of an ecosystem, and back again
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Cycles of MatterWater Cycle:
- evaporation (liquid to gas)
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Cycles of MatterWater Cycle:
- evaporation- condensation (gas to liquid)
(cloud formation)
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Cycles of MatterWater Cycle:
- evaporation- condensation- precipitation (rain, snow, sleet, hail, fog)
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Cycles of MatterWater Cycle:
- evaporation- condensation- precipitation- infiltration / runoff (groundwater, streams, oceans)
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Water Cycle
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Cycles of MatterOxygen – Carbon Cycle:
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Cycles of MatterOxygen – Carbon Cycle:
- photosynthesis (producers: take CO2 O2)
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Cycles of MatterOxygen – Carbon Cycle:
- photosynthesis (producers: take CO2 O2)
- respiration (consumers: take O2 CO2)
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Carbon – Oxygen Cycle
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Cycles of MatterNitrogen Cycle:
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Cycles of MatterNitrogen Cycle:
- fixation: bacteria change “free” N from air to N-compounds in soil
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Cycles of MatterNitrogen Cycle:
- metabolizing: N-compounds moved from soil to plants to animals
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Cycles of MatterNitrogen Cycle:
- decomposition: bacteria “free” N back to air again
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Nitrogen Cycle
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Cycles of ChangeEcological Succession:
- gradual change from one community to another
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Cycles of ChangeEcological Succession:
- gradual change from one community to another
Climax Community:
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Cycles of ChangeEcological Succession:
- gradual change from one community to another
Climax Community:- a stable community of organisms
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Cycles of ChangeEcological Succession: