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Related Concept Videos

Symbiosis00:58

Symbiosis

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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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Microbial Interactions: Mutualism01:25

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Mutualism is a symbiotic interaction in which all participating organisms benefit. These relationships can be obligate or facultative and are fundamental to ecosystem functions across diverse biological systems.Plant–Fungi MutualismOne well-known example is the association between plant roots and mycorrhizal fungi, such as Rhizophagus species. The fungal hyphae penetrate the root hairs and the epidermis, forming an extensive hyphal network that establishes a symbiotic association. Through...
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Microbial Interactions: Cooperation01:26

Microbial Interactions: Cooperation

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Microbial cooperation involves beneficial interactions in which different species work together for individual or mutual advantage. These interactions can profoundly influence ecological dynamics and evolutionary processes, and they are essential to many pathogenic and symbiotic relationships.Nematode–Bacteria CooperationA striking example is the relationship between the Gram-negative bacterium Xenorhabdus nematophila and the parasitic nematode Steinernema carpocapsae. Juvenile nematodes...
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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.
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Predator-Prey Interactions02:39

Predator-Prey Interactions

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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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Trophic Levels01:35

Trophic Levels

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All organisms in an ecosystem occupy a trophic level in the food chain. The lowest level consists of primary producers, which synthesize their food from either solar or chemical energy. Each subsequent level obtains energy from the levels below. Detritivores can occupy any of the levels above primary producers.
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Related Experiment Video

Updated: May 2, 2026

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

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Insect mutualisms buffer warming effects on multiple trophic levels.

Michael Marquis, Israel Del Toro, Shannon L Pelini

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    Summary
    This summary is machine-generated.

    Insect mutualisms, like ants and aphids, can buffer warming effects on plants and specialist herbivores. However, disrupted mutualisms amplify warming

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    Area of Science:

    • Ecology
    • Climate Change Biology
    • Insect Ecology

    Background:

    • Insect mutualisms significantly influence arthropod and plant communities.
    • Understanding how mutualisms affect responses to climatic change is crucial.

    Purpose of the Study:

    • To investigate if insect mutualisms alter host plant and herbivore responses to warming.
    • To assess the impact of ant-plant-aphid interactions under simulated climate change.

    Main Methods:

    • Utilized open-top warming chambers at Harvard Forest, Massachusetts.
    • Manipulated temperature and the presence of ants and Chaitophorus populicola aphids on Populus tremuloides.
    • Monitored ant attendance, aphid persistence, predator abundance, plant stress, and Myzus persicae abundance.

    Main Results:

    • Ants increased Chaitophorus populicola aphid persistence, regardless of warming.
    • Warming had minimal direct effects on plant stress, but significant indirect effects.
    • Plant stress decreased with warming only when ants and C. populicola were mutually interacting.
    • Warming-induced decreases in predators and increases in Myzus persicae elevated plant stress.

    Conclusions:

    • Intact insect mutualisms can buffer specialist herbivores and plants against warming.
    • Disrupted mutualisms exacerbate the negative impacts of warming via indirect effects on predators and generalist herbivores.