Interactive comment on “Contribution of Marine Group II Euryarchaeota to cyclopentyl tetraethers in the Pearl River estuary and coastal South China Sea: impact on the TEX86 paleothermometer” by J. X. Wang et al
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چکیده
In the manuscript by Wang et al., the authors claim that they have characterized the archaeal tetraether membrane lipids (GDGTs) produced by the marine euryarchaeota group II (MGII) and assess the effect of their synthesized lipids on the GDGT-based paleotemperature proxy TEX86. For that purposes, they analyzed core lipids (CL) and intact polar lipids (IPL) GDGTs, they performed 454 pyrosequencing analyses to address the archaeal diversity and quantified the abundance of the MGII by quantitative PCR (qPCR) in suspended particulate matter (SPM) and surface sediments collected along the salinity gradient of the lower Pearl river and its estuary to the coastal South
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Interactive comment on “Contribution of Marine Group II Euryarchaeota to cyclopentyl tetraethers in the Pearl River estuary and coastal South China Sea: impact on the TEX86 paleothermometer” by J. X. Wang et al
Reply to general comments: We acknowledge that this reviewer’s comments are important and thoughtful. We have done makeup experiments to quantify the abundances of MG I (AOA) and total DNA from the same filter samples (Table 1 and Fig. 5). The qPCR date exhibited that MG II was statistically higher (duplicate experiments) than MG I in the mixing water and seawater, which suggests that MG II pre...
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TEX86 [TetraEther indeX of glycerol dialkyl glycerol tetraethers (GDGTs) with 86 carbon atoms] has been widely applied to reconstruct (paleo-) sea surface temperature. Marine Group I (MG-I) Thaumarchaeota were thought to be the primary source of GDGTs constituting the TEX86 formula; however, recent research has suggested that Marine Group II (MG-II) Euryarchaeota may also contribute significant...
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