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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...
Epiphytes, Parasites, and Carnivores02:40

Epiphytes, Parasites, and Carnivores

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 biosynthesis of the...
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.
Keystone Species01:39

Keystone Species

Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a pivotal role in the...
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

Updated: Jun 12, 2026

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms
16:03

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

Published on: January 11, 2015

Aquatic predation alters a terrestrial prey subsidy.

Jeff Scott Wesner1

  • 1Biological Station and Department of Zoology, University of Oklahoma, Norman, Oklahoma 73019, USA. jeffwesner@ou.edu

Ecology
|May 28, 2010
PubMed
Summary

Predation in aquatic habitats significantly impacts terrestrial ecosystems by altering insect biomass and trophic structure. This highlights how cross-ecosystem predation affects food webs.

Area of Science:

  • Ecology
  • Ecosystem Dynamics
  • Predator-Prey Interactions

Background:

  • Organisms with complex life histories (CLH) connect ecosystems by moving between habitats.
  • Predation impacts can cascade across ecosystems, but studies often focus locally.
  • Understanding cross-habitat predation is crucial for food web dynamics.

Purpose of the Study:

  • To test if aquatic predation alters terrestrial prey assemblage magnitude and trophic structure.
  • To assess terrestrial consumer response to changes in aquatic prey export.
  • To investigate the cascading effects of fish predation on insect emergence.

Main Methods:

  • Utilized large outdoor stream mesocosms for controlled experimentation.
  • Implemented three treatments: two fish monocultures and a fishless control.

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Assaying Predatory Feeding Behaviors in Pristionchus and Other Nematodes
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Assaying Predatory Feeding Behaviors in Pristionchus and Other Nematodes

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Related Experiment Videos

Last Updated: Jun 12, 2026

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms
16:03

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

Published on: January 11, 2015

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

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Assaying Predatory Feeding Behaviors in Pristionchus and Other Nematodes
06:27

Assaying Predatory Feeding Behaviors in Pristionchus and Other Nematodes

Published on: September 4, 2016

  • Quantified aquatic insect emergence biomass and trophic structure, and spider responses.

    • Main Results:

    • Fish predation reduced aquatic insect emergence biomass by 50%.
    • Emergent insect predator biomass was reduced by 50%, altering trophic structure.
    • Terrestrial spiders did not numerically respond to overall insect abundance changes.

    Conclusions:

    • Aquatic predation strongly influences the biomass and trophic structure of terrestrial subsidies.
    • Predation in one habitat can lead to contrasting predictions for recipient food webs.
    • Absence of fish resulted in higher terrestrial insect biomass and predator proportions.