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Related Concept Videos

Microbial Interactions: Predation01:28

Microbial Interactions: Predation

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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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Predator-Prey Interactions02:39

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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.
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Symbiosis00:58

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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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Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
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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.
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Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
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Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
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Inter-specific interactions linking predation and scavenging in terrestrial vertebrate assemblages.

Marcos Moleón1, José A Sánchez-Zapata, Nuria Selva

  • 1School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Wits, 2050, Johannesburg, South Africa; Departamento de Biología Aplicada, Universidad Miguel Hernández, Ctra. Beniel Km 3.2, 03312, Orihuela, Alicante, Spain.

Biological Reviews of the Cambridge Philosophical Society
|March 8, 2014
PubMed
Summary

Predators and scavengers are more interconnected than previously thought. This review explores how scavenging influences predator-prey dynamics and food webs, impacting species interactions and conservation efforts.

Keywords:
carnivorecarrionecosystem stabilityfood webglobal changehyperpredationhypopredationinter-specific competitioninter-specific facilitationvulture

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Conservation Biology

Background:

  • Predation and scavenging are traditionally viewed as separate ecological processes.
  • Most predators also scavenge, a factor often overlooked in food-web studies.
  • This oversight limits understanding of complex interspecific interactions.

Purpose of the Study:

  • To review interspecific interactions linking predators, prey, vultures, and carrion in terrestrial vertebrate communities.
  • To highlight direct (competition, facilitation) and indirect (hyperpredation, hypopredation) processes.
  • To propose a conceptual framework for future research.

Main Methods:

  • Literature review focusing on interactions between large mammalian carnivores, ungulates, and vultures.
  • Analysis of direct and indirect ecological effects.
  • Synthesis of existing knowledge on predator-scavenger dynamics.

Main Results:

  • Identified an intricate network of direct and indirect interactions between predators, prey, and carrion.
  • Demonstrated that scavenging significantly influences population dynamics and food webs.
  • Challenged the classic view that scavenging is ecologically inert.

Conclusions:

  • Predator-scavenger interactions are crucial for understanding food webs and community ecology.
  • Carrion consumption by predators creates emergent top-down effects.
  • Future research should integrate living and non-living resources for a holistic view of food webs and conservation.