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P and H2O Cycles
Question | Answer |
---|---|
Major P reservoir? | Rocks and sediments |
How does the P cycle move? | Wind and rain break down rock and phospkate is released and dissolved into water; water carries phospahte into nearby soils/bodies of water. |
What is P needed? | For DNA, ATP, bone and teeth enamel in some animals. |
What is P a limiting nutrient. | The phosphorus cycle is very slow. |
What are synthetic sources of P? | Mining P minerals and adding to products like synthetic fertilizers and detergents and cleaners. |
How does synthetic P enter bodies of water? | Fertilizers contating P are added to lawns or ag. field; runoof carries P into nearby bodies of water. P from detergents and cleaners enter bodies of water via wastewater from homes. |
How do plants and animals get P? | P is absorbed by plant roots and assimilate into tissue. Animals assimilate P by eating plants and other animals. |
How does P return to the soil? | Animals waste, plant matter, and other biomass is broken down by bacteria/soil decompowes that return phosphate to soil. |
What does P do in water? | Forms soild bits that fall to the bottom as sediment (sedimentation). P sediments can be compressed into sed. rock over long periods of time by pressure of overlying water. |
What is geological uplift? | Techtonic plate collision forcing up rock layers that form mountains. |
How does eutrophication occur? | From fertilizer runoff, human/animal waste contamination. |
What is eutrophication? | Excess N and P in aq. ecosystems. Fuel algae growth. |
How does eutrophication create a positive feedback loop. | less O2 ---> more dead org. ---> more bacterial decompostion ----> less O1cc |
What is evaportranspiration? | Amount of H2O that enters atm. from transpiration and evap. combine. |
What is inflitration? | Precip. that trickles thorugh soil down into grouwater aquifers. |