Extracellular calcification in<i>Chrysotila lamellosa</i>(Prymnesiophyceae)

Green, J.C.; Course, P.A.

doi:10.1080/00071618300650361

Cited by 24 publications

(10 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Parke, 1974Parke, , 1975Green and Course, 1983) and that the same alkenone distribution pattern was found in this study and in the sediments from many lakes, we think that C. lamellosa is not only the alkenone precursor organism in Lake Xiarinur but, furthermore, is one of the most common precursors of alkenones in lacustrine systems. However, C 38 methyl alkenones have been found in other lakes such as Lake Balikun (Chu et al, 2005), Lake Titicaca (Theissen et al, 2005), and some lakes in Germany (Zink et al, 2001) and Greenland (D'Andrea and Huang, 2005).…”

Section: Long Chain Alkenone Distributionmentioning

confidence: 48%

“…Taxonomy and distribution of C. lamellosa C. lamellosa is distributed not only in coastal marine environments (Anand, 1937;Green and Parke, 1975;Rontani et al, 2004), but also in a variety of continental environments Parke, 1974, 1975;Green and Course, 1983). Its phylogenetic origin is not clear among LCK-containing algae, but 18S r-DNA sequencing (Edvardsen et al, 2000) and molecular phylogenic studies (Fujiwara et al, 2001) suggest that Emiliania, Gephyrocapsa and Isochrysis are closely related and form a monophyletic taxonomic group.…”

Section: Resultsmentioning

confidence: 99%

“…Coastal strains of C. lamellosa have been shown by Marlowe et al (1984) and Rontani et al (2004) to produce alkenones. A culture of C. lamellosa (strain 528; Marlowe et al, 1984) collected from the inland saline lake Neusiedlersee near Vienna (Green and Course, 1983) showed that this species is one of the alkenone producers in continental ecosystems. The strain of C. lamellosa we isolated from Lake Xiarinur, an inland lake that lies several hundreds of kilometers from the seashore, is not thalassic, but an inland species that lives in saline lakes.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Calibration of alkenone unsaturation index with growth temperature for a lacustrine species, Chrysotila lamellosa (Haptophyceae)

Sun¹,

Chu

Liu

et al. 2007

Organic Geochemistry

View full text Add to dashboard Cite

Section: Long Chain Alkenone Distributionmentioning

confidence: 48%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Calibration of alkenone unsaturation index with growth temperature for a lacustrine species, Chrysotila lamellosa (Haptophyceae)

Sun¹,

Chu

Liu

et al. 2007

Organic Geochemistry

View full text Add to dashboard Cite

“…Alkenone distributions and concentrations have been reported elsewhere , as has alkenone δD and the α-S relationship for exponential phase I. galbana . For C. lamellosa, problems with cell counting, probably caused by cell clumping (Green and Course, 1983), made it difficult to calculate growth rates and to identify the transition between growth phases, which meant no sampling occurred during the exponential phase. We have therefore termed the sampling at 13 or 14 days early stationary phase and at 35 days, late stationary phase.…”

mentioning

confidence: 99%

The effects of growth phase and salinity on the hydrogen isotopic composition of alkenones produced by coastal haptophyte algae

Chivall

M'Boule

Sinke-Schoen

et al. 2014

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

The isotopic fractionation of hydrogen during the biosynthesis of alkenones produced by marine haptophyte algae has been shown to depend on salinity and, as such, the hydrogen isotopic composition of alkenones is emerging as a palaeosalinity proxy. The relationship between fractionation and salinity has previously only been determined during exponential growth, whilst it is not yet known in which growth phases natural haptophyte populations predominantly exist. We have therefore determined the relationship between the fractionation factor, α alkenones-water , and salinity for C 37 alkenones produced in different growth phases of batch cultures of the major alkenone-producing coastal haptophytes Isochrysis galbana (strain CCMP 1323) and Chrysotila lamellosa (strain CCMP 1307) over a range in salinity from ca. 10 to 35. α alkenones-water was similar in both species, ranging over 0.841-0.900 for I. galbana and 0.838-0.865 for C. lamellosa. A strong (0.85 ≤ R 2 ≤ 0.97; p < 0.0001) relationship between salinity and fractionation factor was observed in both species at all growth phases investigated. This suggests that alkenone δD has the potential to be used as a salinity proxy in neritic areas where haptophyte communities are dominated by these coastal species. However, there was a marked difference in the sensitivity of α alkenones-water to salinity between different growth phases: in the exponential growth phase of I. galbana, α alkenones-water increased by 0.0019 per salinity unit (S -1 ), but was less sensitive at 0.0010 S -1 and 0.0008 S -1 during the stationary and decline phases, respectively. Similarly, in C. lamellosa α alkenones-water increased by 0.0010 S -1 in the early stationary phase and by 0.0008 S -1 during the late stationary phase. Assuming the shift in sensitivity of α alkenones-water to salinity observed at the end of exponential growth in I. galbana is similar in other alkenone-producing species, the predominant growth phase of natural populations of haptophytes will affect the sensitivity of the alkenone salinity proxy. The proxy is likely to be most sensitive to salinity when alkenones are produced in a state similar to exponential growth. IntroductionOne of the important controls of climate in the late Quaternary is ocean circulation (e.g. Broecker et al., 1985), which transports heat and moisture around the globe (Ganachaud and Wunsch, 2000). This circulation depends on, amongst other factors, differences in seawater density, which in turn are partly dependent on salinity. Meanwhile, 86% of evaporation and 78% of precipitation occur over the ocean (Baumgartner and Reichel, 1975), the relative amounts of which affect salinity at the sea surface (e.g. Durack et al., 2012). Therefore, the ability to reconstruct past sea surface salinities is of importance to understand past changes in both ocean dynamics and the hydrological cycle.Currently, the hydrogen isotopic composition (δD) of C 37 alkenones is emerging as a potential sea surface salinity proxy. These long-chain alkenones are acet...

show abstract

“…the concentration supporting an uptake rate 50% of the maximum) for NO3 was 0-i /tM for E. huxleyi, this value being the lowest/(o-5 NO3 for marine phytoplankton (Eppley et al, 1969). The possibility of a structural requirement for organic nitrogen in calcite formation seems unlikely because in contrast to other coccoliths, those of E. huxleyi lack an organic baseplate (Green & Course, 1983), although an acid polysaccharide is associated with the calcite (De Jong et al, 1976).…”

Section: Discussionmentioning

confidence: 96%

Nitrate availability and calcite production inEmiliania huxleyiLohmann

Merrett¹,

Dong²,

Nimer³

1993

European Journal of Phycology

View full text Add to dashboard Cite

High-calcifying cells of Emiliania huxleyi were grown on a synthetic seawater medium and the effect of nitrate (NO3) concentration on growth, calcite accumulation, calcification rate and DIC (dissolved inorganic carbon) utilisation determined. The stoichiometry between NO3 utilisation and calcite production was 1:6.5 (mol/mol). Calcification and growth were tightly coupled: calcite production ceased when cultures entered the stationary phase due to NO; depletion, but by adding a pulse of NO; growth and calcification were restored. The initial C/N ratio in the medium was important in relation to calcification rate. At 20/~M NO3 the total DIC (2 mM) was rapidly depleted, the calcification rate subsequently declining, whereas at 5 and 10/~M NO3 ~ rates of calcification were constant at 20 g carbon celt ~x 1014.h ~ throughout culture growth, excess DIC being present relative to the available NO3. Calcite production per unit NO3 was similar for isolates of E. huxleyi from neritic, oligotrophic and nitrate-rich waters. In laboratory cultures, where the photon flux density is optimised for growth, the initial NO; concentration is a reliable indicator of final calcite yield.

show abstract

Extracellular calcification inChrysotila lamellosa(Prymnesiophyceae)

Cited by 24 publications

References 24 publications

Calibration of alkenone unsaturation index with growth temperature for a lacustrine species, Chrysotila lamellosa (Haptophyceae)

Calibration of alkenone unsaturation index with growth temperature for a lacustrine species, Chrysotila lamellosa (Haptophyceae)

The effects of growth phase and salinity on the hydrogen isotopic composition of alkenones produced by coastal haptophyte algae

Nitrate availability and calcite production inEmiliania huxleyiLohmann

Contact Info

Product

Resources

About