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Related Concept Videos

Interference: Path Lengths01:10

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Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
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Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and...
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When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect of the waves is the sum of the individual waves' effects. However, it does not imply that the individual waves affect the propagation of other waves.
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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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When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
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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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Interference at several temporal and spatial scales between two chestnut insects.

Domitien Debouzie1, Annie Heizmann1, Emmanuel Desouhant1

  • 1UMR CNRS 5558 Biométrie, Génétique et Biologie des Populations, Université Claude Bernard, 43, bd du 11 novembre 1918, F-69622, Villeurbanne Cedex, (France).

Oecologia
|March 18, 2017
PubMed
Summary
This summary is machine-generated.

Insect competition is scale-dependent. Weevil and moth larvae in chestnut fruits show interference at the fruit level, but not at the tree level, highlighting the importance of resource assessment.

Keywords:
Asymmetric competitionChestnut insectsEgg-layingScaling

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Area of Science:

  • Ecology
  • Insect Behavior
  • Plant-Insect Interactions

Background:

  • Detecting interspecific insect competition is challenging and often depends on the scale of observation.
  • Larvae of the weevil Curculio elephas and the moth Cydia splendana infest chestnut fruits (Castanea sativa), presenting a model for studying competition.

Purpose of the Study:

  • To investigate the scale-dependent nature of interspecific competition between C. elephas and C. splendana.
  • To determine how competition manifests at different observational scales: individual chestnut fruit, husk, and entire tree.

Main Methods:

  • Conducted 14 years of field observations and direct experimental interventions within chestnut trees.
  • Collected data at three distinct scales: individual chestnut fruits, husks (containing 1-3 fruits), and whole trees.
  • Analyzed infestation rates and insect interactions at each scale.

Main Results:

  • Significant interference between the weevil and moth was detected at the individual chestnut fruit scale.
  • Moth larvae inhibited weevil egg-laying, while weevil presence had minimal impact on moth larvae.
  • Interference was weaker at the husk scale and absent at the tree scale, with no correlation in infestation rates between the two insects across trees.

Conclusions:

  • Interspecific competition between these insects is strongly scale-dependent, primarily occurring at the microhabitat (fruit) level.
  • Potential mechanisms for weevil-moth interference include olfactory cues (repellent molecules) or auditory detection of moth larvae by weevils.
  • Understanding plant-insect interactions requires considering both quantitative and qualitative aspects of resource availability across multiple scales.