Species-specific photosynthetic responses of symbiotic zoanthids to thermal stress and ocean acidification

2015 ◽  
Vol 37 (2) ◽  
pp. 442-458 ◽  
Author(s):  
Erin R. Graham ◽  
Robert W. Sanders
Keyword(s):  
Thermal Stress ◽  
Ocean Acidification ◽  
Photosynthetic Responses ◽  
Species Specific

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.

scholarly journals Losing a winner: thermal stress and local pressures outweigh the positive effects of ocean acidification for tropical seagrasses

2018 ◽  
Vol 219 (3) ◽  
pp. 1005-1017 ◽  
Author(s):  
Catherine J. Collier ◽  
Lucas Langlois ◽  
Yan Ow ◽  
Charlotte Johansson ◽  
Manuela Giammusso ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Ocean Acidification ◽  
Positive Effects ◽  
Local Pressures

scholarly journals Ocean Acidification Alters the Photosynthetic Responses of a Coccolithophorid to Fluctuating Ultraviolet and Visible Radiation

2013 ◽  
Vol 162 (4) ◽  
pp. 2084-2094 ◽  
Author(s):  
Peng Jin ◽  
Kunshan Gao ◽  
Virginia E. Villafañe ◽  
Douglas A. Campbell ◽  
E. Walter Helbling
Keyword(s):  
Ocean Acidification ◽  
Visible Radiation ◽  
Photosynthetic Responses

scholarly journals Supplemental Material: Ocean acidification during the early Toarcian extinction event: Evidence from boron isotopes in brachiopods

2020 ◽  
Author(s):  
Tamás Müller ◽  
et al.
Keyword(s):  
Ocean Acidification ◽  
Specific Effect ◽  
Boron Isotopes ◽  
Carbonate Chemistry ◽  
Additional Information ◽  
Model Sample ◽  
Calibration Methods ◽  
Extinction Event ◽  
Age Model ◽  
Species Specific

Detailed information on the applied geochemical and calibration methods, carbonate chemistry models, age model, sample preservation, and additional information about species-specific effect on δ<sup>11</sup>B fractionation in brachiopods.<br>

scholarly journals Short-term responses to ocean acidification: effects on relative abundance of eukaryotic plankton from the tropical Timor Sea

2020 ◽  
Author(s):  
Janina Rahlff ◽  
Sahar Khodami ◽  
Lisa Voskuhl ◽  
Matthew P. Humphreys ◽  
Christian Stolle ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Community Composition ◽  
Hypervariable Region ◽  
18S Rrna Gene ◽  
Marine Biodiversity ◽  
Rrna Gene ◽  
Tropical Regions ◽  
Timor Sea ◽  
Decreasing Ph ◽  
Species Specific

ABSTRACTAnthropogenic carbon dioxide (CO2) emissions drive climate change and pose one of the major challenges of our century. The effects of increased CO2 in the form of ocean acidification (OA) on the communities of marine planktonic eukaryotes in tropical regions such as the Timor Sea are barely understood. Here, we show the effects of high CO2 (pCO2=1823±161 μatm, pHT=7.46±0.05) versus in situ CO2 (pCO2=504±42 μatm, pHT=7.95±0.04) seawater on the community composition of marine planktonic eukaryotes immediately and after 48 hours of treatment exposure in a shipboard microcosm experiment. Illumina sequencing of the V9 hypervariable region of 18S rRNA (gene) was used to study the eukaryotic community composition. Down-regulation of extracellular carbonic anhydrase occurred faster in the high CO2 treatment. Increased CO2 significantly suppressed the relative abundances of different eukaryotic operational taxonomic units (OTUs), including important primary producers. These effects were consistent between abundant (DNA-based) and active (cDNA-based) taxa after 48 hours, e.g., for the diatoms Trieres chinensis and Stephanopyxis turris. Effects were also very species-specific among different diatoms. Planktonic eukaryotes showed adaptation to the CO2 treatment over time, but many OTUs were adversely affected by decreasing pH. OA effects might fundamentally impact the base of marine biodiversity, suggesting profound outcomes for food web functioning in the future ocean.

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