TY - JOUR
T1 - Impact of temperature on long chain diol and mid-chain hydroxy methyl alkanoate composition in Proboscia diatoms
T2 - Results from culture and field studies
AU - Rampen, Sebastiaan W.
AU - Schouten, Stefan
AU - Schefuss, Enno
AU - Damste, Jaap S. Sinninghe
PY - 2009/11
Y1 - 2009/11
N2 - Long chain 1,14-diols and 12-hydroxy methyl alkanoates are biomarker lipids for Proboscia diatoms and occur widely in Quaternary sediments. To determine the effect of temperature on the lipid composition of these algae, a new Proboscia sp. culture grown at 8 degrees C and Proboscia indica cultures grown at 18, 21, 24 and 27 degrees C were examined. The results were combined with lipid data from a A indica culture and a Proboscia alata culture, grown at 20 and 2 degrees C, respectively, from previous studies. The data showed a strong relationship between long chain diol and 12-hydroxy methyl alkanoate composition and growth temperature, i.e. the chain length increases and the degree of unsaturation of long chain 1,14-diols decreases with increasing growth temperature. To determine the effect of temperature on Proboscia lipid compositions in natural environments, we also analyzed fossil long chain 1,14-diols and 12-hydroxy methyl alkanoates in surface sediments derived from Proboscia diatoms living in the water column of the eastern South Atlantic. The results indicate a significant relationship between sea surface temperature and chain length distribution of saturated long chain diols, but also suggest that the relative abundances of unsaturated long chain diols and 12-hydroxy methyl alkanoates in sediments are predominantly determined by factors other than temperature. (C) 2009 Elsevier Ltd. All rights reserved.
AB - Long chain 1,14-diols and 12-hydroxy methyl alkanoates are biomarker lipids for Proboscia diatoms and occur widely in Quaternary sediments. To determine the effect of temperature on the lipid composition of these algae, a new Proboscia sp. culture grown at 8 degrees C and Proboscia indica cultures grown at 18, 21, 24 and 27 degrees C were examined. The results were combined with lipid data from a A indica culture and a Proboscia alata culture, grown at 20 and 2 degrees C, respectively, from previous studies. The data showed a strong relationship between long chain diol and 12-hydroxy methyl alkanoate composition and growth temperature, i.e. the chain length increases and the degree of unsaturation of long chain 1,14-diols decreases with increasing growth temperature. To determine the effect of temperature on Proboscia lipid compositions in natural environments, we also analyzed fossil long chain 1,14-diols and 12-hydroxy methyl alkanoates in surface sediments derived from Proboscia diatoms living in the water column of the eastern South Atlantic. The results indicate a significant relationship between sea surface temperature and chain length distribution of saturated long chain diols, but also suggest that the relative abundances of unsaturated long chain diols and 12-hydroxy methyl alkanoates in sediments are predominantly determined by factors other than temperature. (C) 2009 Elsevier Ltd. All rights reserved.
KW - Nutrient concentrations
KW - Thermal adaptation
KW - Isochrysis-galbana
KW - Emiliania-huxleyi
KW - Membrane-lipids
KW - Arabian sea
KW - Fatty-acids
KW - Keto-ols
KW - Sediments
KW - Indicators
UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=d7dz6a2i7wiom976oc9ff2iqvdhv8k5x&SrcAuth=WosAPI&KeyUT=WOS:000272116300002&DestLinkType=FullRecord&DestApp=WOS
U2 - 10.1016/j.orggeochem.2009.08.005
DO - 10.1016/j.orggeochem.2009.08.005
M3 - Article
SN - 0146-6380
VL - 40
SP - 1124
EP - 1131
JO - Organic Geochemistry
JF - Organic Geochemistry
IS - 11
ER -