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Related Concept Videos

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.
Microbial Interactions: Predation01:28

Microbial Interactions: Predation

Microbial predation refers to the process by which one microorganism kills and consumes another to obtain nutrients and energy. It encompasses both bacterial and protozoan predators. This interaction plays a crucial role in shaping microbial communities and regulating nutrient cycling.Bacterial Predators: Epibiotic vs. EndobioticBacterial predators are classified based on their mode of attack as either epibiotic or endobiotic. Epibiotic predators, such as Vampirococcus, attach to the surface of...
Symbiosis00:58

Symbiosis

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...
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.
Hybrid Zones02:29

Hybrid Zones

Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
Types of Selection01:46

Types of Selection

Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...

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Updated: May 22, 2026

Collecting Marine Gnathiid Isopod Fish Parasites with Light Traps
06:43

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Published on: September 25, 2023

Adaptive and variable intraguild predators facilitate local coexistence in an intraguild predation module.

San-He Wu1, Toshinori Okuyama

  • 1Department of Entomology, National Taiwan University, No, 1, Sec, 4, Roosevelt Rd, Taipei, 106, Taiwan.

BMC Ecology
|May 26, 2012
PubMed
Summary
This summary is machine-generated.

Intraguild predation coexistence is more likely than previously thought. Individual variation in adaptive foraging behavior can promote species coexistence, even when models predict otherwise.

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Area of Science:

  • Ecology
  • Theoretical Ecology
  • Population Dynamics

Background:

  • Intraguild predation (IGP), where a predator consumes its prey which also competes for resources, is widespread in nature.
  • Ecological models often predict difficult coexistence in three-species IGP modules (predator, prey, resource).
  • This contrasts with the observed ubiquity of IGP, suggesting limitations in current models or analyses.

Purpose of the Study:

  • To re-evaluate species coexistence in IGP modules.
  • To explore alternative coexistence mechanisms beyond traditional models.
  • To investigate the role of individual variation in adaptive behavior on IGP dynamics.

Main Methods:

  • Revisiting a standard three-species IGP module model.
  • Employing invasion analysis to assess species coexistence.
  • Incorporating individual variation in adaptive foraging behavior into the analysis.

Main Results:

  • Invasion analysis underestimates coexistence potential, even without adaptive behavior.
  • Coexistence is possible when invasion analysis predicts its impossibility.
  • Underestimation is amplified by adaptive foraging in intraguild predators, especially with variable behavior.

Conclusions:

  • Species coexistence in IGP modules is more feasible than previously assumed.
  • Analytical methods, like invasion analysis, can underestimate coexistence.
  • Individual variation in adaptive behavior is a key factor promoting coexistence in IGP systems.