Depth-related differences in archaeal populations impact the isoprenoid tetraether lipid composition of the Mediterranean Sea water column, supplement to: Besseling, Marc; Hopmans, Ellen C; Koenen, Michel; van der Meer, Marcel T J; Vreugdenhil, Sanne; Schouten, Stefan; Sinninghe Damsté, Jaap S; Villanueva, Laura (2019): Depth-related differences in archaeal populations impact the isoprenoid tetraether lipid composition of the Mediterranean Sea water column. Organic Geochemistry, 135, 16-31

Marc Besseling, Ellen C Hopmans, Michel Koenen, Marcel T J van der Meer, Sanne Vreugdenhil, Stefan Schouten, Jaap S Sinninghe Damsté & Laura Villanueva
Thaumarchaeota are one of the most abundant groups of Archaea in the marine water column. Their membrane consists of isoprenoid glycerol dibiphytanyl glycerol tetraethers (GDGTs) which are applied in the widely used TEX86 proxy to reconstruct past sea surface temperatures (SSTs). However, in some specific marine systems, such as the Mediterranean Sea, core-top TEX86-derived temperatures do not seem to reflect annual mean SSTs. This has been attributed to contributions of deep-water dwelling Thaumarchaeota. Here, we...
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