@article{oai:nipr.repo.nii.ac.jp:00010164,
 author = {G.I., Matsumoto and E., Honda and K., Sonoda and S., Yamamoto and T., Takemura and G.I., Matsumoto and E., Honda and K., Sonoda and S., Yamamoto and T., Takemura},
 issue = {2},
 journal = {Polar science, Polar science},
 month = {Aug},
 note = {We studied the geochemical features and compound-specific (CS)-δ13C of hydrocarbons and fatty acids in soil samples from the McMurdo Dry Valleys in the Antarctic to elucidate their source organisms and characteristics of their environments. Total organic carbon contents in soil samples were extremely low reflecting extremely harsh environments for organisms. Normal-alkanes ranging in carbon chain length from n-C14 to n-C38 with the predominance of odd-carbon numbers were found, together with n-alkenes (n-C23:1 to n-C27:1). Normal-alkanoic acids ranging in carbon chain length from n-C10 to n-C30 with the predominance of even-carbon numbers were detected in the samples, along with small amounts of branched (iso and anteiso) and n-alkenoic acids. CS-δ13C values of long-chain n-alkanes (n-C20 to n-C29) ranged from -30.4 to -26.6‰. CS-δ13C values of n-alkanoic acids with short-chain carbon numbers (n-C14 to n-C19) ranging from -27.7 to -21.7‰ were much higher than those of long-chain carbon numbers (n-C20 to n-C30, -32.5 to -25.3‰). The geochemical features and CS-δ13C values of long-chain n-alkanes and n-alkanoic acids revealed that they are originated from lichen and/or vascular plant debris from the pre- and inter-glacial periods in this region, whereas short-chain n-alkanoic acids are come from microalgae and cyanobacterial debris. CS-δ13C values suggest that they are derived from gymnosperms and/or C4 plants in the cold and dry environments of the pre- and inter-glacial periods of the McMurdo Dry Valleys region., 南極マクマードドライバレーの土壌中に存在する炭化水素および脂肪酸の地球化学的特徴と分子レベル炭素同位対比（CS-δ13C）を明らかにし、それらの起源生物とそれらの環境について推定を行った。土壌中の全有機炭素 (TOC)濃度は極めて低く生物活動に対する極限環境を反映していることが示された。長鎖n-アルカン（n-C20 ? n-C29）のCS-δ13C値は-30.4－-26.6‰であった。短鎖n-アルカノイック酸（n-C14 ? n-C18）のCS-δ13C値は-27.7－-21.7‰で，長鎖n-アルカノイック酸 (n-C20 ? n-C30)のそれらの値（-32.5－-25.3‰）よりかなり高かった。これらの地球化学的特徴およびCS-δ13C値より，長鎖成分は現在の地衣類および氷期以前に生息した維管束植物の分解物、短鎖成分は微細藻類やシアノバクテリアの分解物に由来することが示された。CS-δ13C値からは氷期以前の裸子植物やC4植物の寄与があることが示唆された。},
 pages = {187--196},
 title = {Geochemical features and sources of hydrocarbons and fatty acids in soils from the McMurdo Dry Valleys in the Antarctic},
 volume = {4},
 year = {2010}
}