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Nutrient Cycles: Basics and Key Concepts

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Nutrient Cycles: Basics and Key Concepts

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Questions and Answers

Which of the following is NOT a major reservoir in the carbon cycle?

Atmosphere

Earth's crust

Soil (correct)

Ocean

Which bacteria are responsible for converting atmospheric nitrogen into usable forms?

Lactobacilli

Rhizobium (correct)

Nitrobacter

Streptococcus

Escherichia coli

Which of the following statements correctly describes the phosphorus cycle?

Upwelling brings phosphorus-rich water from deeper layers to the surface. (correct)

Phosphorus has a significant atmospheric phase, similar to the carbon cycle.

Phosphorus is a key component of DNA and RNA. (correct)

Phosphorus is readily available in most soil solutions due to its high solubility.

Phosphorus is a crucial component of the nitrogen cycle.

What is the primary function of the nitrogen cycle?

<p>To convert atmospheric nitrogen into usable forms by organisms. (D)</p> Signup and view all the answers

What is the significance of a nutrient cycle?

<p>Nutrient cycles determine the movement of nutrients within an ecosystem, regulating the availability of essential elements for life. (D)</p> Signup and view all the answers

Flashcards

Nutrient Cycle

A process describing how elements necessary for life move within ecosystems.

Reservoir

A location where nutrients are stored in an ecosystem.

Flux

The movement of nutrients from one reservoir to another.

Carbon Cycle

The movement of carbon between Earth's crust, ocean, atmosphere, and fossil fuels.

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Nitrogen Fixation

The process of converting atmospheric nitrogen (N₂) into usable forms by bacteria.

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Study Notes

Nutrient Cycles: The Basics

Nutrient cycles describe how elements needed for life move around an ecosystem.
These cycles involve biogeochemical processes, and understanding reservoirs and fluxes is key.
A reservoir is the location of nutrients, while flux is the movement or process of moving nutrients.

Water Cycle

Includes the hydrosphere
Various reservoirs and fluxes

Carbon Cycle

Earth's crust is the largest carbon holder
Ocean and atmosphere also hold significant amounts of carbon
Burning fossil fuels releases CO2 into the atmosphere.

Nitrogen Cycle

Nitrogen gas (N2) is 78% of the atmosphere.
Bacteria are essential for the cycle.
Rhizobium bacteria live on plant roots (legumes).
Nitrogen fixation converts N2 into usable forms.

Phosphorus Cycle

Phosphorus has no atmospheric phase.
Phosphate often sinks and is not readily soluble in soil.
Upwelling and warmer water currents can bring phosphorus to the surface.
Excess phosphorus can be problematic.

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Description

This quiz covers the fundamental nutrient cycles essential for life, including the water, carbon, nitrogen, and phosphorus cycles. Dive into the reservoirs, fluxes, and critical processes that sustain ecosystems. Test your knowledge on how these essential nutrients move through our environment.