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

Agonism and Antagonism: Quantification01:14

Agonism and Antagonism: Quantification

1.3K
When drugs are administered, they can elicit either an agonist or antagonist effect on the body. Agonism occurs when a drug activates a specific receptor, triggering a biological response. On the other hand, antagonism happens when a drug binds to the same receptors but blocks their activation, thereby preventing a biological response.
To quantify these effects, researchers use a dose-response curve, which provides valuable information about the potency and efficacy of a drug. Potency refers to...
1.3K
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

9.5K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
9.5K
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

2.8K
2.8K
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

3.3K
3.3K
Woodward–Hoffmann Selection Rules and Microscopic Reversibility01:34

Woodward–Hoffmann Selection Rules and Microscopic Reversibility

4.2K
Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
4.2K
Multicompartment Models: Overview01:14

Multicompartment Models: Overview

716
Multicompartment models are mathematical constructs that depict how drugs are distributed and eliminated within the body. They segment the body into several compartments, symbolizing various physiological or anatomical areas connected through drug transfer processes such as absorption, metabolism, distribution, and elimination.
These models offer a more comprehensive representation of drug behavior in the body than one-compartment models. They accommodate the complexity of drug distribution,...
716

You might also read

Related Articles

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

Sort by
Same author

From strains to ecosystems: biocrust microbiomes as a new paradigm for dryland agriculture.

The ISME journal·2026
Same author

Natural microcosms in ecology: fulfilling the promise of model systems?

Philosophical transactions of the Royal Society of London. Series B, Biological sciences·2026
Same author

Linking species local trends from assemblage monitoring to global extinction risk.

Nature communications·2026
Same author

Aridity-related differences in soil elemental ratios reshape microbial functional traits across global biomes.

Nature communications·2026
Same author

Functional restructuring of the global soil microbiome under multiple stressors.

Nature communications·2026
Same author

Persistence and turnover of soil organic carbon in global drylands.

Nature communications·2026
Same journal

Stoichiometric constraints modulate temperature and nutrient effects on biomass distribution and community stability.

Oikos (Copenhagen, Denmark)·2023
Same journal

Evolutionary irony: evidence that 'defensive' plant spines act as a proximate cue to attract a mammalian herbivore.

Oikos (Copenhagen, Denmark)·2021
Same journal

The challenges that spatial context present for synthesizing community ecology across scales.

Oikos (Copenhagen, Denmark)·2020
Same journal

Functional richness of local hoverfly communities (Diptera, Syrphidae) in response to land use across temperate Europe.

Oikos (Copenhagen, Denmark)·2020
Same journal

Phenological plasticity is a poor predictor of subalpine plant population performance following experimental climate change.

Oikos (Copenhagen, Denmark)·2020
Same journal

Static and dynamic expression of life history traits in the Northern Fulmar (<i>Fulmarus glacialis</i>).

Oikos (Copenhagen, Denmark)·2017
See all related articles

Related Experiment Video

Updated: Apr 14, 2026

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
20:36

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Published on: July 4, 2007

9.3K

Matrix models for quantifying competitive intransitivity.

Werner Ulrich1, Santiago Soliveres2, Wojciech Kryszewski3

  • 1Chair of Ecology and Biogeography Nicolaus Copernicus University in Toruń Lwowska1, 87-100 Toruń, Poland.

Oikos (Copenhagen, Denmark)
|April 28, 2015
PubMed
Summary
This summary is machine-generated.

New metrics and statistical tests can now assess intransitive competition networks using species abundance and competition matrices. This provides the first tools to estimate intransitivity from observational data.

Keywords:
Ecological abundance matrixcompetitiondiversitymeta-communityvariance decomposition

More Related Videos

A Quantitative Fitness Analysis Workflow
11:39

A Quantitative Fitness Analysis Workflow

Published on: August 13, 2012

15.1K
RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans
11:09

RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans

Published on: July 17, 2021

3.5K

Related Experiment Videos

Last Updated: Apr 14, 2026

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
20:36

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Published on: July 4, 2007

9.3K
A Quantitative Fitness Analysis Workflow
11:39

A Quantitative Fitness Analysis Workflow

Published on: August 13, 2012

15.1K
RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans
11:09

RBDT: A Computerized Task System based in Transposition for the Continuous Analysis of Relational Behavior Dynamics in Humans

Published on: July 17, 2021

3.5K

Area of Science:

  • Ecology
  • Community Ecology
  • Theoretical Ecology

Background:

  • Assessing the role of intransitive competition in natural communities is challenging due to the need for extensive pairwise competition experiments linked to field data.
  • Existing methods lack the ability to quantify the contribution of intransitivity using observational datasets alone.

Purpose of the Study:

  • To introduce novel metrics and statistical tests for evaluating the contribution of intransitivity to community structure.
  • To develop tools for estimating the degree of intransitivity in competitive networks from observational data.

Main Methods:

  • Developed patch transition matrices (P matrices) from competition matrices (C matrices) derived from pairwise experimental studies.
  • Utilized a Markov chain model and a randomization test to evaluate intransitivity using P matrices and empirical or simulated C matrices.
  • Applied methods to analyze empirical data on necrophagous flies and their parasitoids colonizing slug carrion.

Main Results:

  • Benchmark tests successfully detected intransitive competition networks without direct measures of pairwise competitive strength.
  • The proposed methods provide the first quantitative approach to estimate intransitivity from observational datasets.
  • The approach is applicable to spatio-temporal data across environmental gradients and experimental interaction data.

Conclusions:

  • The developed metrics and statistical tests offer a significant advancement in understanding the role of intransitive competition in ecological communities.
  • These tools enable the analysis of intransitivity using readily available observational data, overcoming previous limitations.
  • The methods have broad applicability in ecological research, from theoretical modeling to empirical studies across diverse environments.