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

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...
What are Biogeochemical Cycles?00:54

What are Biogeochemical Cycles?

The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.
What is an Ecosystem?01:17

What is an Ecosystem?

Overview
Microenvironments01:22

Microenvironments

Microorganisms inhabit highly localized spaces known as microenvironments, which are defined by distinct physical and chemical characteristics. These include oxygen concentration, pH, temperature, light availability, and nutrient levels. The conditions within a microenvironment can differ markedly from those in the surrounding area and significantly influence microbial growth, metabolism, and community structure.Microenvironments often display sharp physicochemical gradients over small spatial...
Microbial Mats01:25

Microbial Mats

Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...
Environmental Applications of Microorganisms01:30

Environmental Applications of Microorganisms

Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...

You might also read

Related Articles

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

Sort by
Same author

Low-Dose Radiotherapy for Benign Achillodynia: A Single Center Experience With Prospective Follow-Up.

Cureus·2026
Same author

Riverine woodlands as a dynamic source of the marine sedimentary carbon sink.

PNAS nexus·2026
Same author

Food web complexity underlies biodiversity effects on ecosystem functioning.

Nature·2026
Same author

Beyond Legacy PFAS: Dominant Role of Ultrashort-Chain and Emerging PFAS in the Elbe River-Sea Continuum.

ACS environmental Au·2026
Same author

Combination of Chromatographic and Machine Learning-Driven Virtual Fractionation Identifies Aryl Hydrocarbon Receptor Agonists in Sediments.

Environmental science & technology·2026
Same author

Whole-stream wastewater addition stimulates the green food web pathway but does not affect food chain length.

Hydrobiologia·2026

Related Experiment Video

Updated: May 10, 2026

Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems
09:38

Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems

Published on: October 29, 2016

Biogeochemical patterns in a river network along a land use gradient.

Norbert Kamjunke1, Olaf Büttner, Christoph G Jäger

  • 1Department of River Ecology, Helmholtz-Centre for Environmental Research UFZ, Brückstraße 3a, 39114, Magdeburg, Germany, norbert.kamjunke@ufz.de.

Environmental Monitoring and Assessment
|June 20, 2013
PubMed
Summary

Land use significantly impacts river chemistry in the Bode catchment, Germany. Agricultural areas increase nutrient and phosphorus levels, while forested areas enhance humic substances in headwaters.

More Related Videos

Continuous Instream Monitoring of Nutrients and Sediment in Agricultural Watersheds
12:50

Continuous Instream Monitoring of Nutrients and Sediment in Agricultural Watersheds

Published on: September 26, 2017

Related Experiment Videos

Last Updated: May 10, 2026

Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems
09:38

Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems

Published on: October 29, 2016

Continuous Instream Monitoring of Nutrients and Sediment in Agricultural Watersheds
12:50

Continuous Instream Monitoring of Nutrients and Sediment in Agricultural Watersheds

Published on: September 26, 2017

Area of Science:

  • Environmental Chemistry
  • Biogeochemistry
  • Hydrology

Background:

  • The Bode catchment exhibits diverse land use, from forests to agricultural and urban areas.
  • It is part of the German Helmholtz Association's Terrestrial Environmental Observatories network.
  • Understanding land use impacts on aquatic ecosystems is crucial for water resource management.

Purpose of the Study:

  • To analyze the biogeochemical characteristics of the Bode river network.
  • To investigate the influence of land use gradients and seasonal variations on surface water quality.
  • To identify relationships between specific land cover types and water parameters.

Main Methods:

  • Biogeochemical analysis of surface water samples collected from headwaters and downstream sites.
  • Sampling conducted in early spring and late summer to capture seasonal differences.
  • Statistical analysis, including Principle Component Analysis (PCA), to differentiate between site and seasonal effects.

Main Results:

  • Downstream sites showed higher concentrations of nutrients (ammonium, nitrate, phosphorus), dissolved copper, and seston dry mass compared to headwaters.
  • Nitrate and phosphorus levels correlated positively with agricultural land proportion.
  • Dissolved organic carbon (DOC) concentration was higher in summer, with smaller molecular size and lower humic content.
  • CO₂ oversaturation was higher downstream and in summer, negatively correlated with oxygen saturation and DOC quality.

Conclusions:

  • Land use, particularly agricultural intensity, strongly influences nutrient concentrations and overall water quality in the Bode river.
  • Seasonal variations significantly affect DOC characteristics and CO₂ dynamics.
  • Site-specific factors, largely driven by land use, have a more pronounced effect on biogeochemical parameters than seasonal changes.