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What is the phosphorous cycle?

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The phosphorous cycle is the biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere. It involves the weathering of rocks, absorption by organisms, and return to the soil through decomposition.

Front

What are the main reservoirs of phosphorus?

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The main reservoirs of phosphorus include rocks, soil, and water bodies. The largest reservoir is found in sedimentary rocks.

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How do algal blooms relate to the phosphorous cycle?

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Algal blooms occur when there is an excess of nutrients, particularly phosphorus, in water bodies, leading to rapid growth of algae.

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What is the role of water runoff in the phosphorous cycle?

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Water runoff brings phosphorus from land into waterways, often as a result of agricultural practices and urban development.

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What impact do decomposers have on the phosphorous cycle?

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Decomposers break down organic matter, returning phosphorus to the soil, making it available for plants and other organisms.

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What is an algal bloom?

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An algal bloom is the rapid increase in the population of algae in water bodies, often triggered by nutrient enrichment.

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Why is phosphorus important for living organisms?

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Phosphorus is essential for the formation of DNA, RNA, and ATP, which are critical for energy transfer and genetic information.

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What human activities can disrupt the phosphorous cycle?

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Human activities such as agriculture (fertilizer use), urban runoff, and wastewater discharge can increase phosphorus levels in water bodies, leading to environmental issues.

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What are the consequences of excessive phosphorus in aquatic ecosystems?

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Excessive phosphorus can lead to eutrophication, which causes algal blooms, oxygen depletion, and harm to aquatic life.

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How does sedimentation affect the phosphorous cycle?

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Sedimentation can trap phosphorus in sediments at the bottom of water bodies, making it unavailable to aquatic organisms until it is released back into the water.