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

What is a Species?01:17

What is a Species?

51.4K
Overview
51.4K
Keystone Species01:39

Keystone Species

25.2K
Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a...
25.2K
Symbiosis00:58

Symbiosis

37.9K
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
37.9K
Distribution and Dispersion00:54

Distribution and Dispersion

25.7K
To understand intra-specific interactions in populations, scientists measure the spatial arrangement of species individuals. This geographic arrangement is known as the species distribution or dispersion. Highly territorial species exhibit a uniform distribution pattern, in which individuals are spaced at relatively equal distances from one another. Species that are highly tied to particular resources, such as food or shelter, tend to concentrate around those resources, and thus exhibit a...
25.7K
Ecological Niches02:02

Ecological Niches

27.1K
All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
27.1K
Diversity of Protists II01:27

Diversity of Protists II

1.7K
Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
1.7K

You might also read

Related Articles

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

Sort by
Same author

Multivalent DNA vaccines induce potent cellular responses and prolong BCG-mediated control of Mycobacterium tuberculosis.

Molecular therapy : the journal of the American Society of Gene Therapy·2026
Same author

Mouse models of tuberculosis uniformly featuring hypoxic necrotic lesions and poor response to chemotherapy.

Infection and immunity·2026
Same author

Mouse Models Uniformly Featuring Human-like Lesions Harboring Drug-tolerant <i>Mycobacterium tuberculosis</i>.

bioRxiv : the preprint server for biology·2025
Same author

A novel chemogenomic discovery platform identifies bioactive hits with rapid bactericidal activity against Mycobacteroides Abscessus.

Tuberculosis (Edinburgh, Scotland)·2023
Same author

International medical graduates (IMGs) in cul-de-sacs: "lost in the labyrinth" revisited?

The Medical journal of Australia·2022
Same author

From decision to action: Detailed modelling of frog tadpoles reveals neuronal mechanisms of decision-making and reproduces unpredictable swimming movements in response to sensory signals.

PLoS computational biology·2021

Related Experiment Video

Updated: Mar 6, 2026

Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities
07:59

Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities

Published on: January 6, 2023

4.4K

Island-sharing by archipelago species.

Alan Roberts1, Lewis Stone2

  • 1Graduate School of Environmental Science, Monash University, 3168, Clayton, Vic., Australia.

Oecologia
|March 18, 2017
PubMed
Summary

Species distribution on islands is not random. A new statistical method reveals significant exclusion and aggregation effects, challenging previous null hypothesis models in ecological assembly rules.

Keywords:
Bird distributionsCommunity structureSpecies co-occurrenceTesting significance

More Related Videos

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
10:23

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

Published on: July 11, 2025

726
Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging
09:19

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Published on: April 18, 2025

1.6K

Related Experiment Videos

Last Updated: Mar 6, 2026

Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities
07:59

Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities

Published on: January 6, 2023

4.4K
A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
10:23

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

Published on: July 11, 2025

726
Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging
09:19

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Published on: April 18, 2025

1.6K

Area of Science:

  • Ecology
  • Biogeography
  • Statistical Modeling

Background:

  • Island biogeography theory, including "assembly rules," posits that species colonization depends on existing species.
  • A debate exists regarding whether species distributions on islands result from ecological interactions or random colonization (null hypothesis).

Purpose of the Study:

  • To develop a novel statistical method to test for species interactions in island colonization.
  • To re-evaluate the null hypothesis of random species distribution against empirical data.

Main Methods:

  • Utilized the number of shared islands between species pairs and its statistical moments (first and second) as a key statistic.
  • Analyzed the Vanuatu archipelago's species distribution data and compared it to a random ensemble generated under null hypothesis constraints.

Main Results:

  • The study's method revealed that while the mean number of shared islands is constrained, the second moment in empirical data significantly exceeds random expectations.
  • This indicates non-random patterns of species exclusion and aggregation not accounted for by the null hypothesis.

Conclusions:

  • The observed species distribution in Vanuatu is more exceptional than predicted by random colonization models.
  • The findings challenge the sufficiency of the null hypothesis and suggest the presence of significant ecological interactions influencing species assembly on islands.