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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.Although predation is commonly associated with carnivory, for...
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...
Optimal Foraging00:48

Optimal Foraging

How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
Trophic Efficiency00:46

Trophic Efficiency

Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
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...
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...

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Related Experiment Video

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Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
10:20

Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter

Published on: March 12, 2013

Intraguild predation promotes complex alternative states along a productivity gradient.

Gaku Takimoto1, Takeshi Miki, Maiko Kagami

  • 1Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06511, USA. gaku@bio.sci.toho-u.ac.jp

Theoretical Population Biology
|June 19, 2007
PubMed
Summary

Intraguild predation, a common food web interaction, can lead to complex alternative states. This study identifies sufficient conditions for these states, crucial for managing ecosystems.

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Area of Science:

  • Ecology
  • Food web dynamics
  • Trophic interactions

Background:

  • Intraguild predation is a fundamental omnivory form influencing food web structures.
  • Alternative states are key to intraguild predation dynamics, but only necessary conditions were known.

Purpose of the Study:

  • To identify sufficient conditions for alternative states in intraguild predation.
  • To clarify patterns of alternative states along productivity gradients.

Main Methods:

  • Utilized simple ecological models to analyze intraguild predation dynamics.
  • Investigated the influence of energy transfer efficiency and resource exploitation ability.

Main Results:

  • Discovered complex, systematic patterns of alternative states across productivity gradients.
  • Identified two key quantities determining sufficient conditions: energy transfer and resource exploitation.

Conclusions:

  • Body size and stoichiometry influence alternative state possibilities in intraguild predation.
  • Food webs with intraguild predation exhibit high potential for complex alternative states, posing management challenges.