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P and H2O Cycles

QuestionAnswer
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.
Created by: skythecowboy
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