Recently, four bacteriohopanepolyols (BHPs), adenosylhopane, and structurally similar adenosylhopane-type 1, 2-methyl adenosylhopane, and 2-methyl adenosylhopane-type 1, have been suggested to be characteristic of soil microbial communities and therefore can serve as molecular markers for soil organic matter (OM) supply in river, lake, and marine sediments. In this study, we analyzed BHPs in peats and soils collected in the Têt watershed (southern France) and compared them with branched glycerol dialkyl glycerol tetraethers (GDGTs), a more established molecular tracer of soil OM. Adenosylhopane-type I is identified in all of the samples from the study area except one collected near the Têt River mouth with up to three of the related compounds also frequently present, particularly in the surface samples. The concentrations of soil-specific BHPs in peat environments have been shown to increase with lower d15N values, providing evidence that N2-fixing bacteria are probably a major source of soil-specific BHPs ... : Supplement to: Kim, Jung-Hyun; Talbot, Helen M; Zarzycka, Barbara; Bauersachs, Thorsten; Wagner, Thomas (2011): Occurrence and abundance of soil-specific bacterial membrane lipid markers in the Têt watershed (southern France): Soil-specific BHPs and branched GDGTs. Geochemistry, Geophysics, Geosystems, 12(2) ...