Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Microbial Wastewater Treatment01:30

Microbial Wastewater Treatment

Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
Microbes and Other Elemental Cycles01:24

Microbes and Other Elemental Cycles

Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
Microbial Bioremediation of Uranium01:25

Microbial Bioremediation of Uranium

Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella, which use...
Freshwater Microbial Ecology01:24

Freshwater Microbial Ecology

Freshwater systems such as streams, rivers, and lakes exhibit distinct physical and biological characteristics that influence their microbial communities. These environments are broadly categorized into lotic systems—those with flowing waters like streams and most rivers—and lentic systems, which include still or slow-moving waters such as lakes, ponds, and marshes.In lentic systems, phytoplankton drive primary production, generating autochthonous organic carbon. In contrast, lotic systems...
Soil Microbial Ecology01:29

Soil Microbial Ecology

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...
Marine Microbial Ecology01:30

Marine Microbial Ecology

Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...

You might also read

Related Articles

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

Sort by
Same author

Plant-based diet quality is associated with esophageal mucosa-associated microbiome profiles and disease severity in a high-risk Chinese population.

Journal of oral microbiology·2026
Same author

Phloretin Protects Goat Adipose-Derived Mesenchymal Stem Cells Against Ferroptosis by Regulating the Nrf2/HO-1/GPX4 Signaling Pathway.

Animals : an open access journal from MDPI·2026
Same author

Laser-Assisted Phase Engineering of 2D MoS<sub>2</sub> for Efficient Solution-Processed Electronics.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Amplifying endogenous arsenic flux: The role of sediment bulking driven by organic matter mineralization.

Water research·2026
Same author

Fabp5 Is the Key Regulator Mediating γ-CEHC Differentiation in Osteoblasts and Osteoclasts.

BioFactors (Oxford, England)·2026
Same author

Adipose-Derived Mesenchymal Stem Cells Improve Acute Liver Injury: A Mechanistic Study Based on the TLR4/MyD88/NF-κB Pathway.

International journal of molecular sciences·2025

Related Experiment Video

Updated: Jul 3, 2026

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies
10:44

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies

Published on: July 1, 2016

Urban wetlands regulate trace element dynamics at the sediment- water interface.

Xiangyu He1, Wenming Yan1, Xiang Chen2

  • 1State Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing, 210098, China; College of Hydrology and Water Resources, Hohai University, Nanjing, 210098, China.

Environmental Pollution (Barking, Essex : 1987)
|July 1, 2026
PubMed
Summary

Urban wetlands influence trace element behavior at the sediment-water interface (SWI). Higher organic loads increase the risk of releasing certain elements, necessitating targeted hydrological controls.

Keywords:
FluxReleaseSedimentTrace elementWetland

More Related Videos

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers
11:43

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers

Published on: March 24, 2023

The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations
10:11

The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations

Published on: August 3, 2016

Related Experiment Videos

Last Updated: Jul 3, 2026

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies
10:44

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies

Published on: July 1, 2016

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers
11:43

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers

Published on: March 24, 2023

The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations
10:11

The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations

Published on: August 3, 2016

Area of Science:

  • Environmental Science
  • Geochemistry
  • Ecology

Background:

  • Urban wetlands are vital for hydrological regulation and pollutant interception.
  • Biogeochemical mechanisms of trace element dynamics at the sediment-water interface (SWI) in urban wetlands are not well understood.

Purpose of the Study:

  • To investigate the vertical distribution and transformation of trace elements in urban wetland sediments.
  • To understand the influence of physicochemical conditions, dissolved organic matter (DOM), and iron on trace element dynamics.

Main Methods:

  • Analysis of trace element vertical distribution in sediments.
  • Investigation of physicochemical conditions at the SWI.
  • Multivariate analysis to determine element associations with DOM and iron.

Main Results:

  • Trace element pollution loads decreased downstream; most elements had higher pore water than overlying water concentrations.
  • As, Co, and W showed positive SWI gradients, while Sb, Ni, and Cd showed negative gradients, indicating selective migration.
  • Element variability shifted from DOM control upstream to DOM/Fe redox coupled control in wetland sediments.

Conclusions:

  • Urban wetlands significantly alter SWI conditions, influencing trace element dynamics through DOM and iron interactions.
  • Wetland conditions promote selective trace element release at the SWI, with higher organic loads potentially increasing release risks.
  • Targeted hydrological controls are recommended to mitigate pollution risks in urban wetlands.