• Corpus ID: 59574117

Intraspecific Genetic Variability in Temperature Tolerance in the Coral Pocillopora damicornis: Effects on Growth, Photosynthesis and Survival

  title={Intraspecific Genetic Variability in Temperature Tolerance in the Coral Pocillopora damicornis: Effects on Growth, Photosynthesis and Survival},
  author={Phillip R. Gillette},
  • P. Gillette
  • Published 2012
  • Environmental Science, Biology
of a thesis at the University of Miami. Thesis supervised by Professor Andrew C. Baker. No. of pages in text. (75) Coral reef ecosystems worldwide are in decline as a result of climate change and other anthropogenic impacts. Prolonged exposure to extreme temperatures are predicted to occur more frequently in the future, resulting in coral bleaching and/or mortality. Different coral colonies within a species often show variation in both bleaching and mortality when exposed to temperature stress… 

The Importance of the Rare: The Role of Background Symbiodinium in the Response of Reef Corals to Environmental Change

This dissertation used high-sensitivity molecular techniques to investigate the presence and functional role of ‘background’ or ‘rare’ Symbiodinium, which occur at low abundance, and therefore may not be detected using standard molecular methods, and demonstrates that rare (or even undetectable) symbionts can become dominant, and can eventually play a critical role in coral bleaching response.

Resilience in reef‐building corals: The ecological and evolutionary importance of the host response to thermal stress

  • C. Drury
  • Environmental Science
    Molecular ecology
  • 2019
The long‐term persistence of coral reefs will require many of these mechanisms to adjust to warmer temperatures within a generation, bridging the gap to reproductive events that allow recombination of standing diversity and adaptive change.

Long term photoacclimation responses of the coral Stylophora pistillata to reciprocal deep to shallow transplantation: photosynthesis and calcification

Despite seemingly having become physiologically acclimated, calcification at both new depths was only half the rate achieved by the controls, suggesting that the coral host requires even longer time than the symbionts to acclimate.

Coral Growth and Skeletal Density Relationships in Some Branching Corals of the Red Sea, Egypt

In situ measurements of seasonal and annual growth rates and the branch thicknesses and the laboratory measurements of skeletal densities using Archimedes’s Principle were done in four branching coral species growing in the exposed and sheltered zones of Hurghada and Hamrawin at the northern Red Sea.

Implications of bleaching on cnidarian venom ecology

Assessing coral health and resilience in a warming ocean: Why looks can be deceptive

  • S. Wooldridge
  • Environmental Science
    BioEssays : news and reviews in molecular, cellular and developmental biology
  • 2014
It is explained how emerging evidence links fast skeletal extension rates with elevated coral‐algae (symbiotic) respiration rates, most‐often mediated by nutrient‐enlarged symbiont populations and/or rising sea temperatures, explains the somewhat paradoxical scenario, whereby at the ecological instant before the reef‐building capacity of the symbiosis is lost, a reef can look visually at its best and be accreting CaCO3 at its maximum.

A new conceptual model of coral biomineralisation: hypoxia as the physiological driver of skeletal extension

It is proposed that the dominant physiological driver of skeletal extension is night-time hypoxia, which is exacerbated by the respiratory oxygen demands of the coral's algal symbionts (= zooxanthellae), and provides a new narrative to explain the high growth rate of symbiotic corals.

Long-term growth rates and effects of bleaching in Acropora hyacinthus

Investigation of the relationship between coral growth, thermal microhabitat, symbionts type, and thermal acclimatization of four species of the Acropora hyacinthus complex in back-reef lagoons in American Samoa confirmed previous studies that found sublethal effects of thermal stress on coral growth.

Change in algal symbiont communities after bleaching, not prior heat exposure, increases heat tolerance of reef corals

Investigating the role of diverse and mutable symbiotic partnerships in increasing corals' ability to thrive in high temperature conditions indicates that increased thermotolerance post-bleaching resulted from symbiont community composition changes, not prior heat exposure.

Growth tradeoffs associated with thermotolerant symbionts in the coral Pocillopora damicornis are lost in warmer oceans

Although warmer oceans will negatively impact corals, clade D may enhance survival at no cost to growth relative to clade C, and genotype–environment interactions can help improve modeling efforts and conservation strategies for reefs under global climate change.



The role of zooxanthellae in the thermal tolerance of corals: a ‘nugget of hope’ for coral reefs in an era of climate change

It is shown that adult corals, at least in some circumstances, are capable of acquiring increased thermal tolerance and that the increased tolerance is a direct result of a change in the symbiont type dominating their tissues from Symbiodinium type C to D.

Species–specific interactions between algal endosymbionts and coral hosts define their bleaching response to heat and light stress

The results challenge speculations that associations with type D are universally most robust to thermal stress and highlight the complexity of interactions between symbiotic partners and a potential role for host factors in determining the physiological performance of reef corals.

Effects of temperature on the mortality and growth of Hawaiian reef corals

Results suggest that a decrease in the natural water temperature of Hawaiian reefs would be more harmful to corals than a temperature increase of the same magnitude.

A community change in the algal endosymbionts of a scleractinian coral following a natural bleaching event: field evidence of acclimatization

Field evidence is shown of a dramatic change in the symbiont community of Acropora millepora, a common and widespread Indo-Pacific hard coral species, after a natural bleaching event in early 2006 in the Keppel Islands.

Experimental responses to elevated water temperature in genotypes of the reef coral Pocillopora damicornis from upwelling and non-upwelling environments in Panama

Coral genotypes from the upwelling Gulf of Panama demonstrated higher vulnerability to thermal stress than coral genotype from the non-upwelled Gulf of Chiriquí, however, the latter showed greater differences in their responses.

Differential effects of copper on three species of scleractinian corals and their algal symbionts (Symbiodinium spp.).

Effect of temperature and temperature adaptation on calcification rate in the hermatypic coral Pocillopora damicornis

Using 45Ca incorporation into the coral skeleton as a measure of calcification rate, the effect of temperature on clacification rate was studied in the hermatypic coral Pocillopora damicornis, showing both 27° and 31°C temperature optima, one or the other being dominant depending on the natural water temperature to which the coral was adapted.

Multiple symbiotic partnerships are common in scleractinian corals, but not in octocorals: Comment on Goulet (2006)

It is suggested that the majority of scleractinian coral species, including virtually all of the dominant reef-building taxa, can be found hosting multiple symbiont types, even at the clade level.

Protein expression and genetic structure of the coral Porites lobata in an environmentally extreme Samoan back reef: does host genotype limit phenotypic plasticity?

It is proposed that the genotype of the coral host may drive limitations to the physiological responses of these corals when faced with new environmental conditions, important in understanding genotypic and environmental interactions in the coral algal symbiosis.

Flexibility and Specificity in Coral-Algal Symbiosis: Diversity, Ecology, and Biogeography of Symbiodinium

  • A. Baker
  • Environmental Science, Geography
  • 2003
Unusual symbionts normally found only in larval stages, marginal environments, uncommon host taxa, or at latitudinal extremes may prove critical in understanding the long-term resilience of coral reef ecosystems to environmental perturbation.