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Related Concept Videos

The Phosphorus Cycle01:21

The Phosphorus Cycle

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Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
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The Nitrogen Cycle01:49

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Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
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Soil Microbial Ecology01:29

Soil Microbial Ecology

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Soil microbial ecology is defined by highly diverse, spatially structured communities that drive nutrient cycling, organic matter turnover, and overall ecosystem stability. Although a gram of soil can contain thousands of bacterial and archaeal taxa, the ecological processes they mediate are even more crucial for sustaining terrestrial life.Microhabitats and NichesSoil is a heterogeneous mixture of minerals, organic matter, water, and air. Microbes inhabit distinct microhabitats formed by...
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Inorganic Nitrogen Assimilation01:22

Inorganic Nitrogen Assimilation

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Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
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Environmental Applications of Microorganisms01:30

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Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
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Overview of Nitrogen Metabolism01:20

Overview of Nitrogen Metabolism

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Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
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Related Experiment Video

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Tree Diversity Enhances Nitrogen Retention and Accelerates Phosphorus Cycling.

Tao Wang1,2, Zaipeng Yu1,2, Minghui Da1,2

  • 1Key Laboratory of Humid Subtropical Eco-Geographical Process of Ministry of Education, Fujian Normal University, Fuzhou, China.

Global Change Biology
|March 20, 2026
PubMed
Summary
This summary is machine-generated.

Tree species richness enhances nitrogen retention and accelerates phosphorus cycling in subtropical forests. Increased biodiversity improves nutrient cycling, promoting ecosystem resilience and mitigating nutrient limitations.

Keywords:
complementaritynitrogen cyclingnutrient limitationphosphorus cyclingtree species richness

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Area of Science:

  • Ecology
  • Biogeochemistry
  • Forest Science

Background:

  • Nitrogen (N) and phosphorus (P) cycling are vital for ecosystem productivity and carbon sequestration.
  • The precise mechanisms linking biodiversity to soil nutrient cycling remain incompletely understood, hindering accurate ecosystem modeling.
  • Subtropical China presents a unique N-sufficient yet P-limited environment for studying nutrient dynamics.

Purpose of the Study:

  • To investigate how tree species richness influences ecosystem nutrient cycling in a P-limited subtropical region.
  • To elucidate the mechanistic links between tree diversity and N and P cycle regulation.

Main Methods:

  • Conducted a large-scale tree diversity experiment in subtropical China.
  • Analyzed changes in N and P stocks, plant nutrient resorption, soil nutrient availability, and microbial activity.
  • Measured N leaching, N2O emissions, and stable isotopes (δ15N) to assess N cycling efficiency.

Main Results:

  • Increased tree species richness led to enhanced N retention through boosted plant N uptake and recycling, reduced N leaching, and lower N2O emissions.
  • Evidence of tighter N cycling was observed, indicated by reduced soil δ15N values.
  • Tree diversity elevated soil acid phosphatase activity, increased foliar P resorption efficiency, and enhanced plant P storage, accelerating P cycling.

Conclusions:

  • Tree species richness directly regulates both nitrogen and phosphorus cycling in terrestrial ecosystems.
  • Biodiversity plays a critical role in mitigating nutrient imbalances and enhancing ecosystem resilience to nutrient limitations.
  • Findings provide experimental evidence crucial for modeling ecosystem responses to biodiversity changes.