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Related Concept Videos

The Carbon Cycle01:14

The Carbon Cycle

Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
Ecological Succession02:17

Ecological Succession

Ecological succession is influenced by the processes of facilitation, inhibition, and toleration. Facilitation occurs when early successional species create more favorable ecological conditions for subsequent species, such as enhanced nutrient, water, or light availability. In contrast, inhibition happens when early successional species create unfavorable ecological conditions for potential successive species, such as limiting resource availability. In some cases, later successional species...
Modeling with Differential Equations01:25

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Population dynamics can be described mathematically by considering the population size P(t) as a function of time. The rate of change of the population is then represented by the derivative of P(t). A simple assumption is that the rate of growth is proportional to the size of the population itself. This leads to an exponential growth model, where the population increases rapidly without bound. While this is a useful first approximation, it does not reflect realistic long-term...
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The carbon cycle is a fundamental Earth process involving the transfer of carbon among the biosphere, lithosphere, atmosphere, and hydrosphere. It plays a critical role in regulating the planet’s climate and supporting life by cycling carbon through various chemical forms and reservoirs. Carbon primarily circulates as carbon dioxide (CO₂), representing its oxidized form, while reduced forms such as methane (CH₄) and organic compounds also play essential roles.Microbial activity is central to...
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In population modeling, integration provides a systematic way to determine accumulated quantities from known rates of change. One such application arises in ecology, where the total weight of a fish population in a body of water is referred to as its biomass. When the rate of growth of this biomass is known as a function of time, calculus can be used to determine the total biomass at a future date.Growth Rate and Biomass FunctionLet the growth rate of the fish population be represented by a...
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Generating Controlled, Dynamic Chemical Landscapes to Study Microbial Behavior
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A Dynamic Succession-Based Life-Cycle Simulation Model for Projecting Carbon Source-Sink Transitions in Urban Plant

Xiaxi Liuyang1,2, Jiayu Lu2, Yang Cao3

  • 1School of Human Settlements, North China University of Water Resources and Electric Power, Zhengzhou 450046, China.

Biology
|July 15, 2026
PubMed
Summary

Urban plant communities can become carbon sinks over 50 years, with 86.1% projected to sequester more carbon than emitted. Designing for vertical complexity and using resource-saving maintenance enhances this carbon benefit.

Keywords:
carbon emissionscarbon sequestrationlife cycle assessmentplant communitysuccession simulation model

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Area of Science:

  • Urban ecology and climate change mitigation.
  • Application of dynamic succession-based life-cycle assessment models.
  • Analysis of nature-based solutions for carbon sequestration.

Background:

  • Urban plant communities are recognized for climate mitigation but their net carbon benefits are uncertain.
  • Existing assessments often neglect community succession, competition, and maintenance emissions in a life-cycle framework.
  • Accurate carbon accounting requires integrating vegetation growth with construction and maintenance impacts.

Purpose of the Study:

  • To develop and apply a dynamic succession-based life-cycle simulation model for urban plant communities.
  • To project the 50-year carbon source-sink transitions of 150 urban plant communities in Tianjin, China.
  • To evaluate net carbon balance by integrating aboveground sequestration with life-cycle emissions.

Main Methods:

  • Developed a dynamic succession model linking plant growth to environmental suitability and competition via a Plant Health Index.
  • Estimated aboveground carbon sequestration using simulated plant structural attributes, biomass equations, and carbon content.
  • Quantified construction and maintenance emissions using life cycle assessment (LCA) for net carbon balance evaluation.

Main Results:

  • Most communities transitioned from carbon sources to sinks within 50 years; 86.1% became net carbon sinks.
  • Net carbon balance ranged from -81.21 kg·C·ha-1 to 3186.08 kg·C·ha-1.
  • Vertical structural complexity, species richness, and resource-saving maintenance positively predicted net carbon balance.

Conclusions:

  • Urban plant communities can achieve significant net carbon sequestration over a 50-year period.
  • Planting design should prioritize vertical complexity, species richness, and adaptive, resource-saving maintenance.
  • Future research should incorporate belowground biomass, soil carbon, and parameter uncertainty for more robust assessments.