Lecture 16 Trangenerational Heat Tolerance In Corals Flashcards
What is key to the survival of coral reefs?
Health and survival of reef builders
What is coral bleaching?
Main reef builders become white as symbionts are released as the symbiotic relationship breaks down
What is this an example of?
Partial mortality
What is this an example of?
Recovery
Name three ways that coral reef populations may survive through the rising temperatures forecast over the next century?
- Shift in their geographic distribution
- Genetic adaption
- Phenotypic plasticity
Name two extrinsic factors that will affect corals geographic distribution?
- Habitat
2. Ocean currents
Name an intrinsic factor that will their shifts in geographic distribution?
Physiological performance
What does genetic adaptation involve?
Genetic changes in a population across generations
How does genetic adaptation happen?
Change in phenotype from one generation to the next through natural selection
Give three points that explain what phenotypic plasticity is?
- Enhanced fitness to variations in the natural environment
- It does not involve a genetic change
- Occurs within one generation
What are the two intra and inter generational acclimization?
- Within-generation acclimatisation through non-genetic processes
- Trangenerational nongenetic and genetic inheritance
What is trans generational acclimatization?
When the exposure of parents to a particular environment leads to improved performance of offspring in the same environment
Name 3 epigenetic mechanisms
- DNA methylation
- Histone modification
- Chromatin remodelling
What s DNA methylation?
Cytosine bases of DNA to 5-methylcytosine
How does methylation play a role in mediating gene expression?
High methylation of promoter sequences correlate with low or no transcription
