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Competition02:34

Competition

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When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
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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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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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Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
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All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
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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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Related Experiment Video

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Author Spotlight: Real-Time Monitoring of Parasite Burden and Host Response
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Last parasite standing.

Gavin G Rutledge1, Thomas D Otto1

  • 1Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SA, UK.

Nature Reviews. Microbiology
|December 10, 2016
PubMed
Summary
This summary is machine-generated.

Whole-genome sequencing surveillance identified novel drug resistance markers in the malaria parasite. This advancement aids in combating drug-resistant malaria strains.

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Area of Science:

  • Genomics
  • Parasitology
  • Molecular Biology

Background:

  • Malaria remains a significant global health threat, driven by drug-resistant Plasmodium falciparum strains.
  • Effective surveillance is crucial for tracking and controlling the spread of antimalarial drug resistance.

Purpose of the Study:

  • To identify novel drug resistance markers in the malaria parasite using whole-genome sequencing.
  • To enhance surveillance strategies for drug-resistant malaria.

Main Methods:

  • Whole-genome sequencing of malaria parasites.
  • Bioinformatic analysis to identify genetic markers associated with drug resistance.

Main Results:

  • Identification of previously unknown genetic markers conferring resistance to antimalarial drugs.
  • Demonstration of whole-genome sequencing as a powerful tool for real-time surveillance of drug resistance.

Conclusions:

  • Whole-genome sequencing surveillance is effective in detecting new drug resistance mechanisms in malaria parasites.
  • Findings will inform the development of new antimalarial treatment strategies and control efforts.