All Flashcards
What is phosphorus?
A macronutrient essential for DNA, RNA, and ATP.
What is phosphate (PO4)?
The primary chemical form of phosphorus in the environment.
What is a limiting nutrient?
A nutrient in short supply that restricts growth.
What is eutrophication?
Excessive nutrient enrichment in a water body, leading to algal blooms.
What is a dead zone?
Area in water bodies with depleted oxygen levels, harmful to aquatic life.
What is weathering?
The breakdown of rocks releasing phosphorus.
What is sedimentation?
The process where phosphorus settles at the bottom of water bodies and becomes stored in rocks and soil.
What is geologic uplift?
The process where ocean sediments are lifted to form mountains, bringing phosphorus back into the soil.
What is runoff?
The movement of water across the land surface, carrying dissolved or suspended materials.
What is decomposition?
The process by which organic matter is broken down into simpler substances.
Why is phosphorus important for living organisms?
Essential for DNA, RNA, and ATP production; a key component of cell membranes and bones.
Why is phosphorus a limiting nutrient in aquatic ecosystems?
It doesn't dissolve easily in water and tends to cling to soil particles, making it less available.
What is the main reservoir of phosphorus?
Rocks and sediments in the Earth's crust.
How does the phosphorus cycle differ from the nitrogen cycle?
Phosphorus cycle has minimal atmospheric component; nitrogen cycle has a significant atmospheric component.
What role does decomposition play in the phosphorus cycle?
Releases phosphorus from dead organisms back into the soil and water, making it available to other organisms.
Explain the role of geologic uplift in the phosphorus cycle.
Brings phosphorus-containing rocks from the ocean floor to land, where weathering releases the phosphorus.
How do humans impact the phosphorus cycle?
Through the use of fertilizers and detergents, leading to excess phosphorus in water bodies.
What is the effect of excess phosphorus in aquatic ecosystems?
Leads to eutrophication, algal blooms, and the creation of dead zones.
Describe the connection between phosphorus and ATP.
Phosphorus is a key component of ATP (adenosine triphosphate), the main energy currency of cells.
What is the significance of phosphorus in DNA and RNA?
Forms the backbone of DNA and RNA molecules, essential for genetic information storage and transfer.
What are the effects of phosphorus runoff from fertilizers?
Eutrophication, algal blooms, dead zones in aquatic ecosystems.
What causes eutrophication?
Excessive phosphorus and nitrogen in water bodies.
What are the effects of algal blooms?
Oxygen depletion, fish kills, reduced water quality.
What are the causes of dead zones?
Decomposition of algal blooms depletes oxygen in water.
What is the effect of weathering on the phosphorus cycle?
Releases phosphorus from rocks into the soil and water.
What is the effect of deforestation on the phosphorus cycle?
Increased runoff and soil erosion, leading to phosphorus loss from the land.
What is the effect of using phosphorus-containing detergents?
Increased phosphorus levels in wastewater and aquatic ecosystems.
What is the effect of geologic uplift on the phosphorus cycle?
Brings phosphorus-containing rocks to the surface, making it available through weathering.
What is the effect of increased sedimentation on the phosphorus cycle?
Phosphorus becomes trapped in sediments, reducing its availability to organisms.
What is the effect of decomposition on the phosphorus cycle?
Returns phosphorus from organic matter to the soil and water, making it available to other organisms.