Related Experiment Video
Updated: May 31, 2026
09:38
Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures
Published on: January 7, 2019
Warming-acidification synergy amplifies plastisphere-mediated nitrous oxide emissions
Muhammad Ayaz1, Liu Wenjing2, Min Deng2
1State Key Laboratory of Lake and Watershed Science for Water Security, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; Department of Environmental and Conservation Sciences, University of Swat, Swat, Khyber Pakhtunkhwa, 19120, Pakistan; University of Chinese Academy of Sciences, Beijing, 100049, China.
Journal of Environmental Management
|May 29, 2026
Summary
Plastic waste amplifies nitrous oxide (N2O) emissions under warming and acidification. Different plastic types like polylactic acid (PLA) show higher N2O release than polyethylene (PE), impacting the nitrogen cycle.
Area of Science:
- Environmental Science
- Microbiology
- Biogeochemistry
Background:
- Climate change, ocean acidification, and plastic pollution are major environmental stressors.
- These factors interact, potentially creating unforeseen consequences for biogeochemical cycles.
- The nitrogen cycle is particularly sensitive to environmental changes.
Purpose of the Study:
- To investigate the synergistic effects of warming, acidification, and plastic waste on nitrous oxide (N2O) emissions.
- To determine how different plastic types influence N2O production in lake ecosystems.
- To elucidate the microbial mechanisms driving N2O emissions from plastic substrates.
Main Methods:
- A factorial mesocosm experiment was conducted to simulate combined warming and acidification.
- Nitrous oxide emissions were measured from various plastic substrates (PLA, PE).
- Microbial community composition and gene expression (nirS, nosZ) were analyzed.
Main Results:
- Combined warming and acidification significantly enhanced N2O emissions from plastic waste.
- Polylactic acid (PLA) substrates exhibited substantially higher N2O emissions (up to 78%) compared to polyethylene (PE).
- Synergistic effects of warming and acidification on N2O emissions were confirmed, with specific microbial communities and gene regulation playing key roles.
Conclusions:
- Plastic waste acts as a climate-sensitive biogeochemical reactor, amplifying N2O emissions under warming and acidification.
- The type of plastic polymer influences the extent of N2O production.
- These findings highlight a critical feedback loop between plastic pollution and climate change, impacting the global nitrogen cycle.
Related Concept Videos
01:27Microbes and Climate Change
Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...
01:50Global Climate Change
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
01:49The Nitrogen Cycle
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...
01:22Inorganic Nitrogen Assimilation
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 nitrate reductase...
03:26Acids, Bases and Neutralization Reactions
An acid-base reaction is one in which a hydrogen ion, H+, is transferred from one chemical species to another. Such reactions are of central importance to numerous natural and technological processes, ranging from the chemical transformations within cells or lakes and oceans to the industrial-scale production of fertilizers, pharmaceuticals, and other substances essential to the society.
01:28Carbon-dioxide Fixation
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...