scholarly journals Change in Emiliania huxleyi Virus Assemblage Diversity but Not in Host Genetic Composition during an Ocean Acidification Mesocosm Experiment

Viruses ◽  
2017 ◽  
Vol 9 (3) ◽  
pp. 41 ◽  
Author(s):  
Andrea Highfield ◽  
Ian Joint ◽  
Jack Gilbert ◽  
Katharine Crawfurd ◽  
Declan Schroeder
Keyword(s):  
Ocean Acidification ◽  
Emiliania Huxleyi ◽  
Mesocosm Experiment ◽  
Genetic Composition ◽  
Host Genetic

scholarly journals Supplementary material to "Overcalcified forms of the coccolithophore <i>Emiliania huxleyi</i> in high CO<sub>2</sub> waters are not pre-adapted to ocean acidification"

2017 ◽  
Author(s):  
Peter von Dassow ◽  
Francisco Díaz-Rosas ◽  
El Mahdi Bendif ◽  
Juan-Diego Gaitán-Espitia ◽  
Daniella Mella-Flores ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Emiliania Huxleyi ◽  
Supplementary Material

scholarly journals Variability in the organic ligands released by Emiliania huxleyi under simulated ocean acidification conditions

2017 ◽  
Vol 4 (6) ◽  
pp. 788-808 ◽  
Author(s):  
Guillermo Samperio-Ramos ◽  
◽  
J. Magdalena Santana-Casiano ◽  
Melchor González-Dávila ◽  
Sonia Ferreira ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Emiliania Huxleyi ◽  
Organic Ligands

scholarly journals The role of ocean acidification in <i>Emiliania huxleyi</i> coccolith thinning in the Mediterranean Sea

2014 ◽  
Vol 11 (10) ◽  
pp. 2857-2869 ◽  
Author(s):  
K. J. S. Meier ◽  
L. Beaufort ◽  
S. Heussner ◽  
P. Ziveri
Keyword(s):  
Ocean Acidification ◽  
Mediterranean Sea ◽  
Abundant Species ◽  
Emiliania Huxleyi ◽  
Carbonate Chemistry ◽  
Carbonate Production ◽  
Surface Ocean ◽  
Nw Mediterranean ◽  
Seawater Carbonate Chemistry

Abstract. Ocean acidification is a result of the uptake of anthropogenic CO2 from the atmosphere into the ocean and has been identified as a major environmental and economic threat. The release of several thousands of petagrams of carbon over a few hundred years will have an overwhelming effect on surface ocean carbon reservoirs. The recorded and anticipated changes in seawater carbonate chemistry will presumably affect global oceanic carbonate production. Coccolithophores as the primary calcifying phytoplankton group, and especially Emiliania huxleyi as the most abundant species have shown a reduction of calcification at increased CO2 concentrations for the majority of strains tested in culture experiments. A reduction of calcification is associated with a decrease in coccolith weight. However, the effect in monoclonal cultures is relatively small compared to the strong variability displayed in natural E. huxleyi communities, as these are a mix of genetically and sometimes morphologically distinct types. Average coccolith weight is likely influenced by the variability in seawater carbonate chemistry in different parts of the world's oceans and on glacial/interglacial time scales due to both physiological effects and morphotype selectivity. An effect of the ongoing ocean acidification on E. huxleyi calcification has so far not been documented in situ. Here, we analyze E. huxleyi coccolith weight from the NW Mediterranean Sea in a 12-year sediment trap series, and surface sediment and sediment core samples using an automated recognition and analyzing software. Our findings clearly show (1) a continuous decrease in the average coccolith weight of E. huxleyi from 1993 to 2005, reaching levels below pre-industrial (Holocene) and industrial (20th century) values recorded in the sedimentary record and (2) seasonal variability in coccolith weight that is linked to the coccolithophore productivity. The observed long-term decrease in coccolith weight is most likely a result of the changes in the surface ocean carbonate system. Our results provide the first indications of an in situ impact of ocean acidification on coccolithophore weight in a natural E. huxleyi population, even in the highly alkaline Mediterranean Sea.

scholarly journals Ocean acidification exacerbates the effect of UV radiation on the calcifying phytoplankter Emiliania huxleyi

2009 ◽  
Vol 54 (6) ◽  
pp. 1855-1862 ◽  
Author(s):  
Kunshan Gao ◽  
Zuoxi Ruan ◽  
Virginia E. Villafañe ◽  
Jean-Pierre Gattuso ◽  
E. Walter Helbling
Keyword(s):  
Ocean Acidification ◽  
Uv Radiation ◽  
Emiliania Huxleyi

scholarly journals A mathematical modelling of bloom of the coccolithophore <i>Emiliania huxleyi</i> in a mesocosm experiment

2008 ◽  
Vol 5 (1) ◽  
pp. 787-840 ◽  
Author(s):  
P. Joassin ◽  
B. Delille ◽  
K. Soetaert ◽  
A. V. Borges ◽  
L. Chou ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dynamic Model ◽  
Dissolved Inorganic Carbon ◽  
Algal Growth ◽  
Emiliania Huxleyi ◽  
Mesocosm Experiment ◽  
Total Alkalinity ◽  
Viral Lysis ◽  
Nitrogen And Phosphorus ◽  
Biogeochemical Parameters

Abstract. A dynamic model has been developed to represent biogeochemical variables and processes observed during a bloom of Emiliania huxleyi coccolithophore. This bloom was induced in a mesocosm experiment during which the ecosystem development was followed over a period of 23-days through changes in various biogeochemical parameters such as inorganic nutrients (nitrate, ammonium and phosphate), total alkalinity (TA), dissolved inorganic carbon (DIC), partial pressure of CO2 (pCO2), dissolved oxygen (O2), photosynthetic pigments, particulate organic carbon (POC), dissolved organic carbon (DOC), Transparent Exopolymer Particles (TEP), primary production, and calcification. This dynamic model is based on unbalanced algal growth and balanced bacterial growth. In order to adequately reproduce the observations, the model includes an explicit description of phosphorus cycling, calcification, TEP production and an enhanced mortality due to viral lysis. The model represented carbon, nitrogen and phosphorus fluxes observed in the mesocosms. Modelled profiles of algal biomass and final concentrations of DIC and nutrients are in agreement with the experimental observations.

scholarly journals Coccolithophore community response to ocean acidification and warming in the Eastern Mediterranean Sea: results from a mesocosm experiment

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Barbara D’Amario ◽  
Carlos Pérez ◽  
Michaël Grelaud ◽  
Paraskevi Pitta ◽  
Evangelia Krasakopoulou ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Mediterranean Sea ◽  
Eastern Mediterranean ◽  
Community Response ◽  
Mesocosm Experiment ◽  
Eastern Mediterranean Sea
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