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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.
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.
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...
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.
Ecological Disturbance02:26

Ecological Disturbance

An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.
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...

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Related Experiment Video

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Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity
08:16

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Published on: March 13, 2014

Does predator interference cause alternative stable states in multispecies communities?

Jianfeng Feng1, Vasilis Dakos, Egbert H van Nes

  • 1Key Laboratory of Pollution Processes and Environmental Criteria at Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China. fengjf@nankai.edu.cn

Theoretical Population Biology
|June 27, 2012
PubMed
Summary
This summary is machine-generated.

Predator interference in multispecies communities increases alternative stable states, enhancing community resilience. However, it simultaneously reduces complex dynamics like chaos, simplifying ecosystem behavior.

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Area of Science:

  • Ecology
  • Theoretical Ecology
  • Community Ecology

Background:

  • Ecological mechanisms promoting stability in simple models are well-known.
  • Consequences for multispecies communities remain largely unexplored.

Purpose of the Study:

  • Investigate predator interference effects on alternative attractors and complex dynamics.
  • Analyze three interference types: asymmetric, symmetric, and conspecific.

Main Methods:

  • Randomly constructed multispecies predator-prey communities.
  • Simulated predator interference effects.

Main Results:

  • Predator interference significantly increased alternative attractors across all types.
  • Interference reduced the emergence of oscillatory or chaotic dynamics.

Conclusions:

  • Predator interference has a dual effect on community stability.
  • Increases critical transitions to multiple stable states while reducing dynamic complexity.