is an essential nutrient for plants and animals in the form of ions. phosphorus is also a building...
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Phosphorus Cycle
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What is Phosphorus?• Is an essential
nutrient for plants and animals in the form of ions.
• Phosphorus is also a building block of certain parts of the human and animal body.
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What is Phosphorus Cycle?
• The phosphorus cycle is the biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.
• Low phosphorus availability slows down microbial growth
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Ecological Function• Is an essential nutrient for plants and
animals in the form of ions. Phosphorus is a limiting nutrient for aquatic organisms.
• Eighty percent of the mined phosphorus is used to make fertilizers.
• Enrichment of phosphate can lead to eutrophication of fresh and inshore marine waters.
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Biological Function• The primary
biological importance of phosphates is as a component of nucleotides.
• It also functions as buffering agent in maintaining acid base homeostasis in the human body.
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Process of the Cycle
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• Phosphates moves quickly through plants and animals.
• Unlike other cycles of matter compounds, phosphorus cannot be found in air as a gas, it only occurs under highly reducing conditions as the gas phosphine PH3.
• Phosphorus is typically the limiting nutrient found in streams, lakes and fresh water environments.
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• The small losses in a terrestrial system caused by leaching through the action of rain are balanced in the gains from weathering rocks.
• Herbivores obtain phosphorus by eating plants, and carnivores by eating herbivores.
• Phosphorus is released back to the soil when plants or animal matter decomposes and the cycle repeats.
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Phosophatic Minerals• The availability of phosphorus in
ecosystem is restricted by the rate of release of this element during weathering.
• The release of phosphorus from apatite dissolution is a key control on ecosystem productivity
• Plant and animal growth depends on the rate of their degradation to generate free phosphate
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Human Interference
• Humans alter the cycle by:
1. Cutting the tropical rain forest2. The use of agricultural
fertilizers3. The use of laundry detergents
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What is natural eutrophication?
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Thanks :)