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Related Concept Videos

The Phosphorus Cycle01:21

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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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Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
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A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
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Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
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A transition management framework to stimulate a circular phosphorus system.

Heidi M Peterson1, Lawrence A Baker2, Rimjhim M Aggarwal3

  • 1Sand County Foundation, 131 W. Wilson Street, Suite 610, Madison, WI 53703 USA.

Environment, Development and Sustainability
|May 19, 2021
PubMed
Summary
This summary is machine-generated.

Transitioning to a circular phosphorus (P) system is crucial for sustainability. Applying transition management (TM) to US case studies reveals progress but highlights the need for further action to achieve a circular economy for P.

Keywords:
Circular economyPhosphorusTransition managementTransition pathways

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Area of Science:

  • Environmental Science
  • Sustainability Studies
  • Resource Management

Background:

  • Global population growth to 2050 will increase demand for phosphorus (P), an essential nutrient.
  • Current linear P use systems contribute to eutrophication and unsustainable resource depletion.
  • Phosphorus is critical for agriculture and all living organisms.

Purpose of the Study:

  • To apply transition management (TM) to shift from linear to circular phosphorus (P) use systems.
  • To examine P management transitions in US intensive agriculture, wastewater, and food waste.
  • To inform future P management strategies globally, especially in developing countries.

Main Methods:

  • Utilized transition management (TM) conceptual framework.
  • Analyzed US case studies in agriculture, wastewater, and food waste management.
  • Examined past P management transitions to inform future strategies.

Main Results:

  • The transition toward a circular economy for phosphorus (P) in the US is incomplete despite improvements.
  • Understanding past P management transitions provides insights for future strategies.
  • TM frameworks can accelerate sustainable P development in the US and globally.

Conclusions:

  • Transition management (TM) is valuable for advancing circular phosphorus (P) systems.
  • Developing TM frameworks for other global regions can promote faster, more effective sustainable P development.
  • Strategic shifts in P management are necessary to meet future global demands sustainably.