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A hypothesis can be a simple sentence or statement about a property or any phenomenon observed or predicted for a population. It is usually a claim about a  property of the population. It can be stated for any field observations or experiments. A hypothesis statement cannot be said to be right or wrong as it is merely a statement. It needs to be tested through an elaborate data collection process and an appropriate statistical test. A hypothesis should be a general but not a vague...
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There are three types of hypothesis tests: right-tailed, left-tailed, and two-tailed.
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Hypothesis testing is a critical statistical procedure facilitating informed, evidence-based decisions. It begins with a hypothesis, which is a tentative explanation, or a prediction about a population parameter. This hypothesis can be either a null hypothesis (H0), indicating no effect or difference, or an alternative hypothesis (Ha), suggesting an effect or difference.
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Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role...
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The coral probiotic hypothesis.

Leah Reshef1, Omry Koren, Yossi Loya

  • 1Department of Molecular Microbiology and Biotechnology, Tel Aviv University, Ramat Aviv, Israel.

Environmental Microbiology
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Summary
This summary is machine-generated.

Corals can adapt to environmental changes and diseases by altering their symbiotic bacteria, challenging predictions of reef destruction. This "Coral Probiotic Hypothesis" suggests rapid microbial shifts aid coral survival.

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Area of Science:

  • Marine Biology
  • Microbiology
  • Ecology

Background:

  • Emerging diseases have caused significant coral mortality globally.
  • Projections indicate widespread coral reef destruction by 2050 due to limited coral adaptability.
  • The Vibrio shiloi/Oculina patagonica model is used to study coral bleaching disease.

Purpose of the Study:

  • To investigate the capacity of corals to adapt to environmental stress and disease.
  • To propose and provide evidence for the Coral Probiotic Hypothesis.

Main Methods:

  • Studied the Vibrio shiloi/Oculina patagonica model system.
  • Analyzed changes in coral-associated bacterial populations under altered environmental conditions.
  • Examined coral resistance to pathogens despite lacking an adaptive immune system.

Main Results:

  • Corals demonstrated rapid adaptation to changing environmental conditions by altering their symbiotic bacterial populations.
  • Evidence supports the hypothesis that corals host diverse bacterial communities that shift dynamically.
  • Corals can develop resistance to pathogens, suggesting a mechanism beyond mutation and selection.

Conclusions:

  • The Coral Probiotic Hypothesis posits that corals adapt via rapid shifts in symbiotic microbes, not just genetic mutation.
  • This microbial adaptation allows corals to adjust to environmental changes more quickly (days to weeks).
  • The hypothesis offers a potential explanation for coral evolutionary success and may temper dire predictions of reef demise.