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Related Concept Videos

Competition02:34

Competition

When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.Intraspecific competition, which occurs between individuals of the same species, serves as a natural mechanism for regulating population size. Too much...
Microbial Interactions: Competition01:26

Microbial Interactions: Competition

Microbial competition is an ecological interaction in which microorganisms vie for limited resources within shared environments. These resources may include nutrients, space, or light, depending on the system. The intensity and outcome of competition are influenced by the environmental context, such as nutrient availability, spatial constraints, and the diversity of microbial species present. These competitive interactions significantly influence the structure, function, and resilience of...
Robbers Cave04:49

Robbers Cave

During the 1950s, the landmark Robbers Cave experiment demonstrated that when groups must compete with one another, intergroup conflict, hostility, and even violence may result. At the Oklahoman summer camp, two troops of boys—termed the Rattlers and the Eagles—took part in a week-long tournament. During this time, their negativity culminated in derogatory name-calling, fistfights, and even vandalism and destruction of property. However, this work also revealed that such tension could be...
Social Facilitation01:04

Social Facilitation

Not all intergroup interactions lead to negative outcomes. Sometimes, being in a group situation can improve performance. Social facilitation occurs when an individual performs better when an audience is watching than when the individual performs the behavior alone. This typically occurs when people are performing a task for which they are skilled.
Interference and Decay01:16

Interference and Decay

Forgetting is a complex cognitive phenomenon influenced by several factors, among which interference and decay are particularly prominent. These processes explain why individuals often struggle to retrieve specific information from memory, leading to lapses in recall that can be observed in everyday situations.
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
Jealousy in Romantic Relationships01:23

Jealousy in Romantic Relationships

Jealousy is an instinctive yet socially complex emotion that arises when a close relationship is threatened. Its origins lie in both biological imperatives and sociocultural conditioning, making it a multifaceted psychological construct. Although universally experienced, the triggers and expressions of jealousy vary notably between individuals, especially across genders, due to evolutionary pressures and cultural influences.Gender Differences and Evolutionary TheoryEvolutionary theory explains...

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Related Experiment Video

Updated: Jun 25, 2026

Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli
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Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli

Published on: August 18, 2023

The ghost of competition present.

T E Miller1, C P Terhorst, J H Burns

  • 1Department of Biological Science, Florida State University, Tallahassee, FL 32306, USA. miller@bio.fsu.edu

The American Naturalist
|February 10, 2009
PubMed
Summary
This summary is machine-generated.

Species assemblages are shaped not only by successful species but also by the traits of unsuccessful ones. Understanding community structure requires considering these "ghost" species that influence ecosystem dynamics.

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How to Create and Use Binocular Rivalry
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How to Create and Use Binocular Rivalry

Published on: November 10, 2010

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Last Updated: Jun 25, 2026

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Published on: November 10, 2010

Area of Science:

  • Ecology
  • Community Ecology
  • Theoretical Ecology

Background:

  • Traditional ecological views posit that community assembly results in stable assemblages dominated by superior competitors from a regional species pool.
  • Prior research primarily focused on the traits of successful species to explain observed species assemblages.
  • The role of unsuccessful species, or those failing to establish, in shaping community structure has been largely overlooked.

Purpose of the Study:

  • To investigate the importance of unsuccessful species' traits in understanding the success of species within ecological communities.
  • To develop and utilize a simulation model to differentiate stable, uninvasible assemblages from other potential community structures.
  • To explore the interplay between successful and unsuccessful species in determining final community composition.

Main Methods:

  • Construction of a simulation model to explore community assembly dynamics.
  • Analysis of species interactions, including those among successful species and between successful and unsuccessful species.
  • Identification of factors distinguishing stable, uninvasible communities from alternative assemblages within a regional species pool.

Main Results:

  • Simulation results indicate that interactions among successful species are crucial for community stability.
  • Interactions between resident successful species and unsuccessful invading species significantly impact community assembly outcomes.
  • The traits of unsuccessful species play a vital role in determining the stability and composition of the final community.

Conclusions:

  • Ecological community structure is influenced by both the traits of resident species and the potential impacts of unestablished ('ghost') species.
  • A comprehensive understanding of community assembly necessitates considering the ecological effects of species that do not ultimately establish.
  • Future ecological research should incorporate the influence of 'ghost' species to fully elucidate community dynamics and stability.