Materi Biologi "Daur Fosfor"

Summary

The phosphorus cycle involves the movement of phosphate through ecosystems. It begins with the weathering of phosphate rocks, which releases inorganic phosphate into the soil, where plants absorb it. Animals obtain phosphorus by consuming plants or other animals. When organisms die, decomposers break down organic phosphorus into inorganic forms, returning it to the soil. Phosphorus also cycles in aquatic ecosystems, where algae, fish, and decomposers play key roles. Additionally, guano birds contribute phosphorus back to land through their droppings. This cycle is essential for sustaining life on Earth.

Takeaways

• 😀 Phosphorus cycle starts from the weathering of phosphate rocks, releasing phosphates into the soil.
• 😀 Plants absorb inorganic phosphates from the soil to meet their phosphate needs.
• 😀 Animals cannot directly use inorganic phosphates, they absorb organic phosphates by consuming plants.
• 😀 Phosphorus moves through the food chain as animals consume plants and other animals.
• 😀 Decomposers break down dead plants and animals, converting organic phosphates into inorganic phosphates.
• 😀 In aquatic ecosystems, phosphorus is absorbed by algae, which are then consumed by fish.
• 😀 When fish die or excrete waste, decomposers break it down into inorganic phosphates.
• 😀 Phosphorus in deep water can form sedimentary deposits, which cannot be used due to the lack of water currents.
• 😀 Phosphates in shallow water are stirred by water currents, enriching the ecosystem and supporting aquatic life.
• 😀 Guano, bird droppings rich in phosphorus, can accumulate in specific areas, returning phosphorus from water back to land.

Q & A

What is the origin of phosphorus in ecosystems?

Phosphorus originates from the weathering of phosphate rocks, which releases phosphate into the soil and water.

How do plants obtain phosphorus?

Plants absorb inorganic phosphate from the soil to meet their phosphorus needs.

How do animals obtain phosphorus?

Animals obtain phosphorus by consuming plants, which contain organic phosphate.

Can animals directly utilize inorganic phosphorus from the soil?

No, animals cannot directly use inorganic phosphorus from the soil; they only absorb organic phosphate from plants.

What happens when plants and animals die in relation to phosphorus?

When plants and animals die, decomposers, such as bacteria, break down their organic phosphate into inorganic phosphate, which re-enters the soil or water.

What role do decomposers play in the phosphorus cycle?

Decomposers break down organic phosphate in dead plants and animals, converting it into inorganic phosphate, which can be reused in the ecosystem.

What happens to phosphorus in aquatic ecosystems?

In aquatic ecosystems, phosphorus is absorbed by algae, and fish obtain it through the food chain. Decomposers break down dead fish and excretions, contributing to the cycle.

Why is phosphorus in deep waters not usable for ecosystems?

Phosphorus in deep waters may form deposits that are not accessible for ecosystems due to the lack of water movement or currents.

How does phosphorus in shallow waters benefit ecosystems?

In shallow waters, dissolved phosphorus is stirred up by water currents, enriching the ecosystem and promoting the growth of aquatic life.

What is the role of guano birds in the phosphorus cycle?

Guano birds, which feed on fish in the sea, excrete phosphorus-rich guano. This contributes to the replenishment of phosphorus in terrestrial ecosystems, transferring it from water to land.