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

What is an Ecosystem?

What is an Ecosystem?

The Soil Ecosystem

The Soil Ecosystem

Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:

Line Loss

Line Loss

The different configurations of source-load connections include wye (star) and delta connections. The relationship between line and phase voltages and currents varies depending on the configuration. When the source is supplying power, it is transmitted through the wires to the load, and during this transmission, some power is absorbed by the wires, leading to line loss.
Line loss impacts power delivery efficiency in a balanced three-phase circuit. The symmetry in such a circuit simplifies the...

Protein Networks

Protein Networks

An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...

Reducing Line Loss

Reducing Line Loss

In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...

Network Covalent Solids

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...

You might also read

Related Articles

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

Sort by

Same author

Agricultural intensification as a geochemical engine: Reshaping spatiotemporal patterns of sediment toxic metal accumulation in a eutrophic plateau lake, Southwest China.

Environmental research·2026

Same author

Nano-sized carbonates in lake sediments: a novel archive for unlocking past environmental changes.

Science bulletin·2026

Same author

Hydrological changes accelerate ecological degradation in a subtropical floodplain lake: A multi-proxy sedimentary record highlights the restoration potential of river-lake connectivity.

Journal of environmental management·2026

Same author

Lake expansion enhances inorganic and organic carbon sinks in sediments of lake Qinghai, Tibetan Plateau.

Journal of environmental management·2026

Same author

Deciphering anthropogenic signatures in lake carbon cycling over the past 150 years: A multi-proxy reconstruction from the fourth largest freshwater lake in China.

Journal of environmental management·2025

Same author

Sedimentary black carbon reveals shifting anthropogenic drivers in Lake Erhai Basin, southwest China.

Environmental pollution (Barking, Essex : 1987)·2025

Search research articles

Related Experiment Video

Updated: Jan 21, 2026

Simulating Impacts of Ice Storms on Forest Ecosystems

Simulating Impacts of Ice Storms on Forest Ecosystems

Published on: June 30, 2020

Network parameters quantify loss of assemblage structure in human-impacted lake ecosystems.

Rong Wang¹, John A Dearing², C Patrick Doncaster³

¹State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China.

Global Change Biology

|July 26, 2019

Summary

Lake community structure changes due to human impacts can be tracked using network analysis. Diatom network analysis reveals shifts in species associations correlating with nutrient pollution and disturbance.

Keywords:

biodiversity diatom assemblages ecological resilience network skewness self-organized system stability

More Related Videos

Integration of 5G Experimentation Infrastructures into a Multi-Site NFV Ecosystem

Integration of 5G Experimentation Infrastructures into a Multi-Site NFV Ecosystem

Published on: February 3, 2021

A Field Primer for Monitoring Benthic Ecosystems Using Structure-From-Motion Photogrammetry

A Field Primer for Monitoring Benthic Ecosystems Using Structure-From-Motion Photogrammetry

Published on: April 15, 2021

Related Experiment Videos

Last Updated: Jan 21, 2026

Simulating Impacts of Ice Storms on Forest Ecosystems

Simulating Impacts of Ice Storms on Forest Ecosystems

Published on: June 30, 2020

Integration of 5G Experimentation Infrastructures into a Multi-Site NFV Ecosystem

Integration of 5G Experimentation Infrastructures into a Multi-Site NFV Ecosystem

Published on: February 3, 2021

A Field Primer for Monitoring Benthic Ecosystems Using Structure-From-Motion Photogrammetry

A Field Primer for Monitoring Benthic Ecosystems Using Structure-From-Motion Photogrammetry

Published on: April 15, 2021

Area of Science:

Ecology
Network Theory
Environmental Science

Background:

Lake biodiversity alone is insufficient to indicate external pressures, as it overlooks internal community structure changes.
Network theory suggests unstressed systems exhibit self-organization in species associations, leading to specific frequency distributions.
Diatom assemblages in lakes provide a valuable model for studying ecological network structures.

Purpose of the Study:

To identify a proxy for ecological deformation in lake communities using diatom assemblages.
To test network theory predictions regarding community structure in relation to environmental stress.
To assess the relationship between human impacts, nutrient loading, and aquatic assemblage structure.

Main Methods:

Analyzed diatom assemblages from 452 species across 273 lakes in China.
Applied network theory to examine frequency distributions of species associations (nodal degree).
Correlated network skewness with environmental variables like total phosphorus, agricultural activity, and urbanization.

Main Results:

Observed shifts in species association frequency distributions from positive skew (West China, low impact) to negative skew (East China, high impact).
Found strong correlations between skew values and nutrient loading (total phosphorus) from human activities.
Demonstrated that positive skew decreases with intensified human impacts and increases during lake recovery.

Conclusions:

Network parameters, specifically skewness of species associations, can effectively track the loss of aquatic assemblage structure.
Human pressures significantly alter lake community structure, impacting ecological networks.
This network-based approach offers a sensitive indicator of ecological deformation in lakes affected by anthropogenic activities.