scholarly journals Host and Symbionts in Pocillopora damicornis Larvae Display Different Transcriptomic Responses to Ocean Acidification and Warming

2018 ◽  
Vol 5 ◽  
Author(s):  
Emily B. Rivest ◽  
Morgan W. Kelly ◽  
Melissa B. DeBiasse ◽  
Gretchen E. Hofmann
Keyword(s):  
Ocean Acidification ◽  
Pocillopora Damicornis ◽  
Transcriptomic Responses

scholarly journals Thermal stress reduces pocilloporid coral resilience to ocean acidification by impairing control over calcifying fluid chemistry

2021 ◽  
Vol 7 (2) ◽  
pp. eaba9958
Author(s):  
Maxence Guillermic ◽  
Louise P. Cameron ◽  
Ilian De Corte ◽  
Sambuddha Misra ◽  
Jelle Bijma ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Ocean Acidification ◽  
Pocillopora Damicornis ◽  
Carbonate Chemistry ◽  
Negative Interaction ◽  
Saturation State ◽  
Stylophora Pistillata ◽  
Coral Calcification ◽  
Influence Of Temperature On ◽  
Different Time Scales

The combination of thermal stress and ocean acidification (OA) can more negatively affect coral calcification than an individual stressors, but the mechanism behind this interaction is unknown. We used two independent methods (microelectrode and boron geochemistry) to measure calcifying fluid pH (pHcf) and carbonate chemistry of the corals Pocillopora damicornis and Stylophora pistillata grown under various temperature and pCO2 conditions. Although these approaches demonstrate that they record pHcf over different time scales, they reveal that both species can cope with OA under optimal temperatures (28°C) by elevating pHcf and aragonite saturation state (Ωcf) in support of calcification. At 31°C, neither species elevated these parameters as they did at 28°C and, likewise, could not maintain substantially positive calcification rates under any pH treatment. These results reveal a previously uncharacterized influence of temperature on coral pHcf regulation—the apparent mechanism behind the negative interaction between thermal stress and OA on coral calcification.

Increased temperature mitigates the effects of ocean acidification on the calcification of juvenile Pocillopora damicornis, but at a cost

Coral Reefs ◽  
2017 ◽  
Vol 37 (1) ◽  
pp. 71-79 ◽  
Author(s):  
Lei Jiang ◽  
Fang Zhang ◽  
Ming-Lan Guo ◽  
Ya-Juan Guo ◽  
Yu-Yang Zhang ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Pocillopora Damicornis ◽  
Increased Temperature

Ocean acidification induces distinct transcriptomic responses across life history stages of the sea urchin Heliocidaris erythrogramma

2020 ◽  
Vol 29 (23) ◽  
pp. 4618-4636
Author(s):  
Hannah R. Devens ◽  
Phillip L. Davidson ◽  
Dione J. Deaker ◽  
Kathryn E. Smith ◽  
Gregory A. Wray ◽  
...  
Keyword(s):  
Life History ◽  
Ocean Acidification ◽  
Sea Urchin ◽  
Heliocidaris Erythrogramma ◽  
Life History Stages ◽  
Transcriptomic Responses

scholarly journals Nutrient gradients simulate different adjustments of coral-algal symbiosis

2020 ◽  
Author(s):  
Haoya Tong ◽  
Guowei Zhou ◽  
Fang Zhang ◽  
Jin Sun ◽  
Weipeng Zhang ◽  
...  
Keyword(s):  
Nitrogen Metabolism ◽  
Atp Synthesis ◽  
Pocillopora Damicornis ◽  
Material Transport ◽  
Coral Larvae ◽  
Coral Larva ◽  
Algal Symbiosis ◽  
Energy Synthesis ◽  
Coral Reef Degradation ◽  
Transcriptomic Responses

Abstract Background: Eutrophication is one of the major causes of coral reef degradation but the effect of eutrophication on coral and its symbiont algae remains unclear, particularly for the larval stage of coral. In the present study, the physiological and transcriptomic responses of the larvae of an ecologically important scleractinian coral Pocillopora damicornis were analyzed after a 5-day exposure to elevated nitrate in order to assess the survival and adaptation of coral-algal symbiosis under elevated nutrients. Results: The results showed that multiple larval transcripts were significantly correlated with Symbiodiniaceae transcripts. The major differentially expressed transcripts in coral/Symbiodiniaceae included those responsible for energy synthesis/comsumption, nitrogen metabolism and stressor response. Slightly elevated nitrate concentration could in fact promote the health of coral meta-organism. With increase in nitrate concentrations, coral larvae showed significant stress response to maintain the coral-algal symbiosis and coral-algal symbiosis was impaired, while Symbiodiniaceae switched photosynthetic states for ATP synthesis, material transport and nitrogen metabolism for symbiosis maintenance under the control of the coral hosts.Conclusions: Our results suggest that adjustment of coral-algal symbiosis via coral control and a shift in Symbiodiniaceae photosynthetic states serves as the basis of coral meta-organism adaptation under eutrophication stresses. The larvae of P. damicornis and Symbiodiniaceae displayed different transcriptomic responses to nitrate enrichment. Coral larva meta-organism can adapt to moderately elevated nutrient concentration while extreme eutrophication can impair coral-algal symbiosis and affect coral larvae survival ultimately.

scholarly journals Pacific-wide contrast highlights resistance of reef calcifiers to ocean acidification

2014 ◽  
Vol 281 (1790) ◽  
pp. 20141339 ◽  
Author(s):  
S. Comeau ◽  
R. C. Carpenter ◽  
Y Nojiri ◽  
H. M. Putnam ◽  
K. Sakai ◽  
...  
Keyword(s):  
Coral Reef ◽  
Calcium Carbonate ◽  
Ocean Acidification ◽  
Regional Scale ◽  
French Polynesia ◽  
Pocillopora Damicornis ◽  
The Pacific ◽  
Tropical Coral ◽  
Geographical Scale ◽  
Key Questions

Ocean acidification (OA) and its associated decline in calcium carbonate saturation states is one of the major threats that tropical coral reefs face this century. Previous studies of the effect of OA on coral reef calcifiers have described a wide variety of outcomes for studies using comparable partial pressure of CO 2 ( p CO 2 ) ranges, suggesting that key questions remain unresolved. One unresolved hypothesis posits that heterogeneity in the response of reef calcifiers to high p CO 2 is a result of regional-scale variation in the responses to OA. To test this hypothesis, we incubated two coral taxa ( Pocillopora damicornis and massive Porites ) and two calcified algae ( Porolithon onkodes and Halimeda macroloba ) under 400, 700 and 1000 μatm p CO 2 levels in experiments in Moorea (French Polynesia), Hawaii (USA) and Okinawa (Japan), where environmental conditions differ. Both corals and H. macroloba were insensitive to OA at all three locations, while the effects of OA on P. onkodes were location-specific. In Moorea and Hawaii, calcification of P. onkodes was depressed by high p CO 2 , but for specimens in Okinawa, there was no effect of OA. Using a study of large geographical scale, we show that resistance to OA of some reef species is a constitutive character expressed across the Pacific.

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