Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

The Carbon Cycle

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.

Inorganic Nitrogen Assimilation

Inorganic 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...

Carbon-dioxide Fixation

Carbon-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...

Bioremediation

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.

The Calvin Benson Cycle

The Calvin Benson Cycle

Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Unlocking efficient near-infrared circularly polarized phosphorescence reaching 800 nm in cyclometalated Pt(II) complexes.

Chemical communications (Cambridge, England)·2026

Same author

Concentration-Responsive Gd-DOTA Nanomicelles via Chain-Length Engineering for Transporter-Independent Hepatobiliary Magnetic Resonance Imaging.

Langmuir : the ACS journal of surfaces and colloids·2026

Same author

A capacitive-piezoelectric hybrid MEMS microphone with signal fusion for enhancing signal-to-noise ratio.

Microsystems & nanoengineering·2026

Same author

Research Progress, Safety Regulation and Application Prospects in Health Food Development of Red Yeast Rice-Derived Bioactive Compounds: A Critical Narrative Review.

Foods (Basel, Switzerland)·2026

Same author

Sustainable Conversion of Plastic and Corrugated Paper into Ni@C Integrated N/S Dual-Doped Carbon Membranes for Accelerated Polysulfide Redox in Lithium Polysulfide Batteries.

Langmuir : the ACS journal of surfaces and colloids·2026

Same author

Formulation Screening of Lipid Nanoparticles Enhances mRNA Delivery to Retina.

Molecular pharmaceutics·2026

Search research articles

Related Experiment Video

Updated: Feb 28, 2026

Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.

Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.

Published on: June 4, 2021

Constrained sediment carbon sequestration driven by agricultural diffuse pollution: Evidence from core-derived DOM.

Kaiyue Ji¹, Wei Ouyang², Xinyi Liu¹

¹State Key Laboratory of Regional Environment and Sustainability, School of Environment, Beijing Normal University, Beijing 100875,China.

|February 25, 2026

Summary

Agricultural pollution impacts river-lake sediment carbon storage. Diffuse pollution increases organic matter lability, limiting carbon sequestration potential in these vital transitional zones.

Keywords:

Diffuse pollution Dissolved organic matter Fluorescence spectroscopy River–lake transitional zone Source apportionment

More Related Videos

Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management

Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management

Published on: September 12, 2017

Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

Published on: October 21, 2016

Related Experiment Videos

Last Updated: Feb 28, 2026

Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.

Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.

Published on: June 4, 2021

Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management

Measuring and Mapping Patterns of Soil Erosion and Deposition Related to Soil Carbonate Concentrations Under Agricultural Management

Published on: September 12, 2017

Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

Published on: October 21, 2016

Area of Science:

Environmental Chemistry
Geochemistry
Ecology

Background:

Sediment organic matter (DOM) in river-lake zones is crucial for nutrient and carbon cycling.
The influence of human and natural sources on sediment composition and carbon stabilization is not well understood.

Purpose of the Study:

To investigate the sources and characteristics of sediment organic matter in Poyang Lake's river-lake ecotone.
To assess the impact of anthropogenic and natural inputs on carbon sequestration potential.

Main Methods:

Vertical profiling of sediments.
Physicochemical, spectroscopic, and isotopic analyses.
Dual-level end-member mixing analysis (EMMA) framework.
LightGBM-SHAP modeling.

Main Results:

Sediments are predominantly sand and silt, with phosphorus pollution exceeding nitrogen.
Stable isotope EMMA indicated fertilizer inputs as a major source of bulk sediment organic matter.
Fluorescence EMMA identified livestock, riparian vegetation, and farmland leaching as key contributors to water-extractable organic matter (WEOM).
Agricultural diffuse pollution increases WEOM lability, hindering carbon sequestration.

Conclusions:

Integrated nutrient management and land-use practices are essential for maintaining carbon storage in floodplain lakes.
Understanding DOM sources and transformations is critical for effective environmental management.