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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...
Limits to Natural Selection01:38

Limits to Natural Selection

Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.For one, natural selection can only act upon existing genetic variation. Hypothetically, redtusks may enhance elephant survival by deterring ivory-seeking poachers. However, if there are no gene variants—or alleles—for redtusks, natural selection cannot increase the prevalence of...
Predator-Prey Interactions02:39

Predator-Prey Interactions

Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.Although predation is commonly associated with carnivory, for...
What are Populations and Communities?00:30

What are Populations and Communities?

Populations are groups of individuals of the same species that inhabit a shared environment. Communities include multiple co-existing, interacting populations of different species. Metapopulations span multiple populations of the same species that occupy different areas. Metapopulations interact through immigration and emigration, providing genetic diversity that lends resilience to harsh environments. Population size and density can be estimated using quadrat and mark and recapture...
Ecological Niches02:02

Ecological Niches

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.Multiple species cannot occupy the exact same niche within their habitat. If the niches of two or more species overlap to a large extent, the competitive exclusion principle dictates that one species will outcompete the other, forcing it to...

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Related Experiment Video

Updated: Jun 5, 2026

How to Create and Use Binocular Rivalry
14:34

How to Create and Use Binocular Rivalry

Published on: November 10, 2010

Competition between kingdoms.

M E Hochberg1, J H Lawton

  • 1Michael Hochberg and John Lawton are at the Centre for Population Biology, Imperial College at Silwood Park, Ascot, Berkshire SL5 7PY, UK.

Trends in Ecology & Evolution
|January 15, 2011
PubMed
Summary
This summary is machine-generated.

Ecological competition often occurs between different kingdoms, not just related species. This inter-kingdom competition, especially between insect parasitoids and pathogens, is common but understudied.

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Comparing the Affinity of GTPase-binding Proteins using Competition Assays
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Comparing the Affinity of GTPase-binding Proteins using Competition Assays

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Last Updated: Jun 5, 2026

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

Published on: November 10, 2010

Comparing the Affinity of GTPase-binding Proteins using Competition Assays
10:37

Comparing the Affinity of GTPase-binding Proteins using Competition Assays

Published on: October 8, 2015

Area of Science:

  • Ecology
  • Evolutionary Biology
  • Microbiology

Background:

  • Traditional ecological studies focus on competition between closely related species.
  • Ecological systems exhibit competition across diverse taxa, including different phyla and kingdoms.
  • Inter-kingdom competition is a widespread but underexplored ecological interaction.

Purpose of the Study:

  • To highlight the prevalence of inter-kingdom competition in natural ecosystems.
  • To emphasize the need for further research into the ecological and evolutionary consequences of inter-kingdom competition.

Main Methods:

  • Review of existing ecological literature on interspecific competition.
  • Analysis of documented cases of competition between different kingdoms, focusing on host-parasite-pathogen interactions.

Main Results:

  • Inter-kingdom competition is a common phenomenon in nature.
  • Insect parasitoids and pathogens from four other kingdoms frequently compete for shared hosts.
  • The ecological and evolutionary implications of these interactions are largely unexplored.

Conclusions:

  • Inter-kingdom competition represents a significant area for future ecological and evolutionary research.
  • Understanding these interactions is crucial for a comprehensive view of community dynamics and host-pathogen evolution.