How Much Do You Know About Heat-Resistant Corals and Bleaching Events?
7 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the advantage of studying heat-resistant corals?

  • To identify the most common species of coral found in Pacific reefs
  • To investigate the symbiotic relationship between corals and photosynthetic symbionts
  • To determine the mechanisms of coral response to climate change (correct)
  • To study the effects of bleaching events on corals

    • What is the difference in temperature between the highly variable (HV) and moderately variable (MV) pools in the U.S. National Park of American Samoa?

  • The HV pool rarely experiences temperatures above 32°C, while the MV pool often exceeds the local critical bleaching temperature of 30°C, reaching 35°C during strong noontime low tides
  • The HV pool and MV pool experience similar temperatures, but the HV pool has higher survivorship and higher symbiont photosynthetic efficiency
  • The HV pool often exceeds the local critical bleaching temperature of 30°C, reaching 35°C during strong noontime low tides, while the MV pool rarely experiences temperatures above 32°C (correct)
  • The MV pool has higher growth rates and higher survivorship than the HV pool

    • What is the intensity parameter I in evolutionary biology?

  • The change in mean phenotype before versus after natural selection, divided by the standard deviation (correct)
  • The retention of chlorophyll derived from photosynthetic symbionts in corals after experimental heat stress
  • The average phenotypic change from corals native to the HV pool versus the MV pool
  • The difference in temperature between the highly variable (HV) and moderately variable (MV) pools

    • What is the average contribution of acclimation to phenotypic differences in corals native to different pools?

    <p>42%</p> Signup and view all the answers

    What loci may be due to adaptive evolution or other factors such as epigenetics or symbiont type?

    <p>Both A and C</p> Signup and view all the answers

    What is the potential impact of acclimatization on predictions for coral reef demise?

    <p>It can worsen the predictions</p> Signup and view all the answers

    What is the difference between acclimation and adaptation in gene expression shifts in corals, and what is the contribution of acclimation to phenotypic differences?

    <p>Acclimation and adaptation both contribute to gene expression shifts in corals. The contribution of acclimation was measured by swapping corals between pools, and it was found to average 42% of the phenotypic difference.</p> Signup and view all the answers

    Study Notes

    Acclimation and adaptation in gene expression shifts in corals

    • Gene expression shifts in corals can be attributed to both acclimation and adaptation.
    • 141 contigs showed significant differences in gene expression levels between corals native to different pools.
    • The contribution of acclimation was measured by swapping corals between pools, and it was found to average 42% of the phenotypic difference.
    • Fixed effects, including TNFR and cellular transport loci, may be due to adaptive evolution or other factors such as epigenetics or symbiont type.
    • Loci with strong acclimation components include TRAF, Ras and Rab proteins, transcription factors, and heat shock proteins.
    • Corals have the ability to acclimate to local differences, as seen in differences in bleaching temperatures between conspecific corals at different latitudes.
    • Coral acclimatization or local adaptation can alter predictions of climate change effects and potentially change predictions for coral reef demise.
    • Acclimatization can allow corals to acquire high-temperature resistance more quickly than strong natural selection would produce.
    • It is unknown how many coral species can acclimate or evolve, and whether there is an upper thermal limit to acclimatization or adaptation.
    • Multiple stressors, such as acidification and heat, can reduce the ability of corals to respond to environmental changes.
    • The rate and scope of acclimatization in coral species is central to understanding the impact of climate change on coral reefs.
    • Acclimatory and adaptive responses allowed fast-growing, shallow-water corals to inhabit reef areas with water temperatures far above their expected tolerances.

    Acclimation and adaptation in gene expression shifts in corals

    • Gene expression shifts in corals can be attributed to both acclimation and adaptation.
    • 141 contigs showed significant differences in gene expression levels between corals native to different pools.
    • The contribution of acclimation was measured by swapping corals between pools, and it was found to average 42% of the phenotypic difference.
    • Fixed effects, including TNFR and cellular transport loci, may be due to adaptive evolution or other factors such as epigenetics or symbiont type.
    • Loci with strong acclimation components include TRAF, Ras and Rab proteins, transcription factors, and heat shock proteins.
    • Corals have the ability to acclimate to local differences, as seen in differences in bleaching temperatures between conspecific corals at different latitudes.
    • Coral acclimatization or local adaptation can alter predictions of climate change effects and potentially change predictions for coral reef demise.
    • Acclimatization can allow corals to acquire high-temperature resistance more quickly than strong natural selection would produce.
    • It is unknown how many coral species can acclimate or evolve, and whether there is an upper thermal limit to acclimatization or adaptation.
    • Multiple stressors, such as acidification and heat, can reduce the ability of corals to respond to environmental changes.
    • The rate and scope of acclimatization in coral species is central to understanding the impact of climate change on coral reefs.
    • Acclimatory and adaptive responses allowed fast-growing, shallow-water corals to inhabit reef areas with water temperatures far above their expected tolerances.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    "Test Your Knowledge on Heat-Resistant Corals and Bleaching Events" - Learn about how coral populations cope with warm-water exposure and the impact of bleaching events. Explore recent research on heat-resistant corals and their survival in naturally warm environments. Challenge your understanding of these fascinating organisms and their responses to changing ocean temperatures.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser