1.6 Phosphorus cycle basics Movement of P atoms and molecules between sources and sinks/reservoirs Rocks and sediments containing p minerals = major reserves P cycle is very slow compared to C/H2O/N cycles Takes a long time for p minerals to be weathered out of rocks and carried into soil/water P has no gas phase so it can't enter atmosphere Because it cycles so slowly it is a limiting nutrient (plant growth is limited by lack of p often) P is needed by all organisms for DNA, ATP, bone, and tooth enamel for some animals Phosphorus sources Major natural source of p is weathering of p containing rocks Wind and rain break down rock and phosphate (PO4^-3) is released and dissolved into water; rainwater carries phosphate into soil and water Weathering is so slow that p is often a limiting nutrient Synthetic sources of p are mining phosphate minerals and adding to products like fertilizers and detergents/cleaners Synthetic fertilizers are added to lawns or agriculture fields; runoff carries p into nearby water Phosphates from detergents and cleaners enter bodies of water via home wastewater Assimilation and excretion/decomposition P is absorbed by plant roots and assimilates into tissues; animals assimilate p by eating plants or other animals Animal waste, plant matter, and other biomass is broken down by bacteria/soil decomposers that return phosphate to soil Assimilation and excretion/decomp form a mini loop within the p cycle just like assimilation and ammonification in the N cycle Sedimentation and geological uplift Phosphate doesn't dissolve very well into water; much of it forms solid bits of phosphate that fall to the bottom as sediment P sediments can be compressed into sed rock over long time periods by pressure of overlaying water Geological uplift is tectonic plate collision forcing up rock layers that form mountains; p cycle can start over again with weathering and release of phosphate from rock. Eutrophication (too much n and p) Because they’re limiting nutrients in aq ecosystems, extra input of n and p leads to eutrophication (excess nutrients) which fuels algae growth Algae bloom covers water surface, blocking sunlight and killing plants below surface Algae eventually dies off; bacteria that break down dead algae use up O2 in the water (decomp is aerobic process) Lower O2 levels (dissolved oxygen) in water kills aquatic animals, especially fish Bacteria use up even more O2 to decompose dead aq animals Creates pos feedback loop; less O2 > more dead org > more bacterial decomp > less O2
Rocks and minerals are a resoorvoit for phosphate as it is a major nautical source, and the phosphorus moves by the weathering of rocks from wind an precipitation that breaks down the rock into soil roots. Then, the second reservoir, plants and soil begin to absorb this P from root uptake that weathering processed into the soil
Mineral rocks are a phosphorus reservoir, as weathering occurs, the phosphorus found in phosphate rocks, dissolves in water, until the rain finishes taking it to the nearest body of water, the phosphorus in the body of water is the absorbed, or consumed by plants such as algae, which use it as an energy source, to grow.
A) The atmosphere carries phosphorus through clouds and releases it to the next reservoir through precipitation. In the earth, the soil seeps, and the bacteria contained begin to break down the phosphorus to be used as nutrients, which ripples to be used by plants to animals.
Is there really a point to going to school anymore? I mean, if everyone is taking AP classes and relying on online sources to do well in those classes because their actual teachers are super bad and abelist, what's the point of in person school these days?
we go to school to be educated, but educators arent doing their jobs and since nobody wants to be a teacher these days, it leaves the school short handed with staff and having no choice but to keep teachers who dont teach.
The guy that has been teaching apes at my school for the past few years is no longer teaching it. The new apes teacher is a great guy, but should not be teaching AP classes. Spending an entire 80 minute class period on what leaching is is ridiculous, and all of our class period is spent reviewing homework (notes on 2 chapters every night).
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1.6
Phosphorus cycle basics
Movement of P atoms and molecules between sources and sinks/reservoirs
Rocks and sediments containing p minerals = major reserves
P cycle is very slow compared to C/H2O/N cycles
Takes a long time for p minerals to be weathered out of rocks and carried into soil/water
P has no gas phase so it can't enter atmosphere
Because it cycles so slowly it is a limiting nutrient (plant growth is limited by lack of p often)
P is needed by all organisms for DNA, ATP, bone, and tooth enamel for some animals
Phosphorus sources
Major natural source of p is weathering of p containing rocks
Wind and rain break down rock and phosphate (PO4^-3) is released and dissolved into water; rainwater carries phosphate into soil and water
Weathering is so slow that p is often a limiting nutrient
Synthetic sources of p are mining phosphate minerals and adding to products like fertilizers and detergents/cleaners
Synthetic fertilizers are added to lawns or agriculture fields; runoff carries p into nearby water
Phosphates from detergents and cleaners enter bodies of water via home wastewater
Assimilation and excretion/decomposition
P is absorbed by plant roots and assimilates into tissues; animals assimilate p by eating plants or other animals
Animal waste, plant matter, and other biomass is broken down by bacteria/soil decomposers that return phosphate to soil
Assimilation and excretion/decomp form a mini loop within the p cycle just like assimilation and ammonification in the N cycle
Sedimentation and geological uplift
Phosphate doesn't dissolve very well into water; much of it forms solid bits of phosphate that fall to the bottom as sediment
P sediments can be compressed into sed rock over long time periods by pressure of overlaying water
Geological uplift is tectonic plate collision forcing up rock layers that form mountains; p cycle can start over again with weathering and release of phosphate from rock.
Eutrophication (too much n and p)
Because they’re limiting nutrients in aq ecosystems, extra input of n and p leads to eutrophication (excess nutrients) which fuels algae growth
Algae bloom covers water surface, blocking sunlight and killing plants below surface
Algae eventually dies off; bacteria that break down dead algae use up O2 in the water (decomp is aerobic process)
Lower O2 levels (dissolved oxygen) in water kills aquatic animals, especially fish
Bacteria use up even more O2 to decompose dead aq animals
Creates pos feedback loop; less O2 > more dead org > more bacterial decomp > less O2
Rocks and minerals are a resoorvoit for phosphate as it is a major nautical source, and the phosphorus moves by the weathering of rocks from wind an precipitation that breaks down the rock into soil roots. Then, the second reservoir, plants and soil begin to absorb this P from root uptake that weathering processed into the soil
Mineral rocks are a phosphorus reservoir, as weathering occurs, the phosphorus found in phosphate rocks, dissolves in water, until the rain finishes taking it to the nearest body of water, the phosphorus in the body of water is the absorbed, or consumed by plants such as algae, which use it as an energy source, to grow.
A) The atmosphere carries phosphorus through clouds and releases it to the next reservoir through precipitation. In the earth, the soil seeps, and the bacteria contained begin to break down the phosphorus to be used as nutrients, which ripples to be used by plants to animals.
Hello! It cannot be in the atmosphere because there is no gas phase of Phosphorous.
are you getting it confused with the nitrogren cycle?
TYSM
👍👍 thank you , very helpful videos
I’m just doing this for school
Is there really a point to going to school anymore? I mean, if everyone is taking AP classes and relying on online sources to do well in those classes because their actual teachers are super bad and abelist, what's the point of in person school these days?
these are mostly for studying your teachers aren’t going to be by your side for everything
we go to school to be educated, but educators arent doing their jobs and since nobody wants to be a teacher these days, it leaves the school short handed with staff and having no choice but to keep teachers who dont teach.
The guy that has been teaching apes at my school for the past few years is no longer teaching it. The new apes teacher is a great guy, but should not be teaching AP classes. Spending an entire 80 minute class period on what leaching is is ridiculous, and all of our class period is spent reviewing homework (notes on 2 chapters every night).
👍👍
W