Production of Dimethylsulfide After Deposition of Increasing Amounts of Emiliania Huxleyi onto Sediments in Marine Microcosms

1996 ◽  
pp. 381-390 ◽  
Author(s):  
Ronald Osinga ◽  
Johanna J. Minnaard ◽  
Wilma E. Lewis ◽  
Fleur C. van Duyl
Keyword(s):  
Emiliania Huxleyi

Effect of short-term light- and UV-stress on DMSP, DMS, and DMSP lyase activity in Emiliania huxleyi

2015 ◽  
Vol 74 (2) ◽  
pp. 173-185 ◽  
Author(s):  
LJ Darroch ◽  
M Lavoie ◽  
M Levasseur ◽  
I Laurion ◽  
WG Sunda ◽  
...  
Keyword(s):  
Emiliania Huxleyi ◽  
Short Term ◽  
Lyase Activity ◽  
Uv Stress

scholarly journals Viral infection of the marine alga Emiliania huxleyi triggers lipidome remodeling and induces the production of highly saturated triacylglycerol

2016 ◽  
Vol 210 (1) ◽  
pp. 88-96 ◽  
Author(s):  
Sergey Malitsky ◽  
Carmit Ziv ◽  
Shilo Rosenwasser ◽  
Shuning Zheng ◽  
Daniella Schatz ◽  
...  
Keyword(s):  
Viral Infection ◽  
Marine Alga ◽  
Emiliania Huxleyi

Formation of mesopyrophaeophorbide a during anaerobic bacterial degradation of the marine prymnesiophyte Emiliania huxleyi

1995 ◽  
Vol 22 (1) ◽  
pp. 225-229 ◽  
Author(s):  
N. Spooner ◽  
J.M. Getliff ◽  
M.A. Teece ◽  
R.J. Parkes ◽  
J.W. Leftley ◽  
...  
Keyword(s):  
Emiliania Huxleyi ◽  
Bacterial Degradation

scholarly journals Emiliania huxleyi endures N-limitation with an efficient metabolic budgeting and effective ATP synthesis

BMC Genomics ◽  
2014 ◽  
Vol 15 (1) ◽  
pp. 1051 ◽  
Author(s):  
Sebastian D Rokitta ◽  
Peter Von Dassow ◽  
Björn Rost ◽  
Uwe John
Keyword(s):  
Atp Synthesis ◽  
Emiliania Huxleyi ◽  
N Limitation

scholarly journals Rewiring Host Lipid Metabolism by Large Viruses Determines the Fate of Emiliania huxleyi, a Bloom-Forming Alga in the Ocean

2014 ◽  
Vol 26 (6) ◽  
pp. 2689-2707 ◽  
Author(s):  
Shilo Rosenwasser ◽  
Michaela A. Mausz ◽  
Daniella Schatz ◽  
Uri Sheyn ◽  
Sergey Malitsky ◽  
...  
Keyword(s):  
Lipid Metabolism ◽  
Emiliania Huxleyi

scholarly journals Evidence for methane production by the marine algae <i>Emiliania huxleyi</i>

2016 ◽  
Vol 13 (10) ◽  
pp. 3163-3174 ◽  
Author(s):  
Katharina Lenhart ◽  
Thomas Klintzsch ◽  
Gerald Langer ◽  
Gernot Nehrke ◽  
Michael Bunge ◽  
...  
Keyword(s):  
Surface Waters ◽  
Marine Algae ◽  
Methanogenic Archaea ◽  
Emiliania Huxleyi ◽  
Algal Culture ◽  
Radiation Balance ◽  
Surface Mixed Layer ◽  
Large Lakes ◽  
Isotope Label ◽  
Ch4 Production

Abstract. Methane (CH4), an important greenhouse gas that affects radiation balance and consequently the earth's climate, still has uncertainties in its sinks and sources. The world's oceans are considered to be a source of CH4 to the atmosphere, although the biogeochemical processes involved in its formation are not fully understood. Several recent studies provided strong evidence of CH4 production in oxic marine and freshwaters, but its source is still a topic of debate. Studies of CH4 dynamics in surface waters of oceans and large lakes have concluded that pelagic CH4 supersaturation cannot be sustained either by lateral inputs from littoral or benthic inputs alone. However, regional and temporal oversaturation of surface waters occurs frequently. This comprises the observation of a CH4 oversaturating state within the surface mixed layer, sometimes also termed the "oceanic methane paradox". In this study we considered marine algae as a possible direct source of CH4. Therefore, the coccolithophore Emiliania huxleyi was grown under controlled laboratory conditions and supplemented with two 13C-labeled carbon substrates, namely bicarbonate and a position-specific 13C-labeled methionine (R-S-13CH3). The CH4 production was 0.7 µg particular organic carbon (POC) g−1 d−1, or 30 ng g−1 POC h−1. After supplementation of the cultures with the 13C-labeled substrate, the isotope label was observed in headspace CH4. Moreover, the absence of methanogenic archaea within the algal culture and the oxic conditions during CH4 formation suggest that the widespread marine algae Emiliania huxleyi might contribute to the observed spatially and temporally restricted CH4 oversaturation in ocean surface waters.

scholarly journals Effects of alkalinity and salinity at low and high light intensity on hydrogen isotope fractionation of long-chain alkenones produced by <i>Emiliania huxleyi</i>

2017 ◽  
Vol 14 (24) ◽  
pp. 5693-5704 ◽  
Author(s):  
Gabriella M. Weiss ◽  
Eva Y. Pfannerstill ◽  
Stefan Schouten ◽  
Jaap S. Sinninghe Damsté ◽  
Marcel T. J. van der Meer
Keyword(s):  
Light Intensity ◽  
Environmental Conditions ◽  
Hydrogen Isotope ◽  
Isotope Fractionation ◽  
Emiliania Huxleyi ◽  
High Light Intensity ◽  
High Light ◽  
Light Conditions ◽  
Low Light ◽  
Long Chain

Abstract. Over the last decade, hydrogen isotopes of long-chain alkenones have been shown to be a promising proxy for reconstructing paleo sea surface salinity due to a strong hydrogen isotope fractionation response to salinity across different environmental conditions. However, to date, the decoupling of the effects of alkalinity and salinity, parameters that co-vary in the surface ocean, on hydrogen isotope fractionation of alkenones has not been assessed. Furthermore, as the alkenone-producing haptophyte, Emiliania huxleyi, is known to grow in large blooms under high light intensities, the effect of salinity on hydrogen isotope fractionation under these high irradiances is important to constrain before using δDC37 to reconstruct paleosalinity. Batch cultures of the marine haptophyte E. huxleyi strain CCMP 1516 were grown to investigate the hydrogen isotope fractionation response to salinity at high light intensity and independently assess the effects of salinity and alkalinity under low-light conditions. Our results suggest that alkalinity does not significantly influence hydrogen isotope fractionation of alkenones, but salinity does have a strong effect. Additionally, no significant difference was observed between the fractionation responses to salinity recorded in alkenones grown under both high- and low-light conditions. Comparison with previous studies suggests that the fractionation response to salinity in culture is similar under different environmental conditions, strengthening the use of hydrogen isotope fractionation as a paleosalinity proxy.

scholarly journals Environmental controls on the <i>Emiliania huxleyi</i> calcite mass

2014 ◽  
Vol 11 (8) ◽  
pp. 2295-2308 ◽  
Author(s):  
M. T. Horigome ◽  
P. Ziveri ◽  
M. Grelaud ◽  
K.-H. Baumann ◽  
G. Marino ◽  
...  
Keyword(s):  
Seawater Temperature ◽  
World Ocean ◽  
Environmental Parameters ◽  
Abundant Species ◽  
Emiliania Huxleyi ◽  
Ion Concentration ◽  
Carbonate Chemistry ◽  
Environmental Controls ◽  
Carbonate Ion ◽  
Phosphate Availability

Abstract. Although ocean acidification is expected to impact (bio) calcification by decreasing the seawater carbonate ion concentration, [CO32−], there is evidence of nonuniform response of marine calcifying plankton to low seawater [CO32−]. This raises questions about the role of environmental factors other than acidification and about the complex physiological responses behind calcification. Here we investigate the synergistic effect of multiple environmental parameters, including seawater temperature, nutrient (nitrate and phosphate) availability, and carbonate chemistry on the coccolith calcite mass of the cosmopolitan coccolithophore Emiliania huxleyi, the most abundant species in the world ocean. We use a suite of surface (late Holocene) sediment samples from the South Atlantic and southwestern Indian Ocean taken from depths lying above the modern lysocline (with the exception of eight samples that are located at or below the lysocline). The coccolith calcite mass in our results presents a latitudinal distribution pattern that mimics the main oceanographic features, thereby pointing to the potential importance of seawater nutrient availability (phosphate and nitrate) and carbonate chemistry (pH and pCO2) in determining coccolith mass by affecting primary calcification and/or the geographic distribution of E. huxleyi morphotypes. Our study highlights the importance of evaluating the combined effect of several environmental stressors on calcifying organisms to project their physiological response(s) in a high-CO2 world and improve interpretation of paleorecords.

scholarly journals Light intensity modulation by coccoliths of Emiliania huxleyi as a micro-photo-regulator

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Yuri Mizukawa ◽  
Yuito Miyashita ◽  
Manami Satoh ◽  
Yoshihiro Shiraiwa ◽  
Masakazu Iwasaka
Keyword(s):  
Light Intensity ◽  
Emiliania Huxleyi ◽  
Intensity Modulation
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