@article{oai:nipr.repo.nii.ac.jp:00006239,
 author = {Matsumoto, Genki I. and Komori, Kazushi and Enomoto, Ayaka and Imura, Satoshi and Takemura, Tetsuo and Ohyama, Yoshikuni and Kanda, Hiroshi},
 journal = {Polar bioscience},
 month = {Jan},
 note = {P(論文), rganic components in sediment cores from Namazu Ike(lake)(length 40cm) and O-ike(lake)(length 32cm) from Syowa Station area, Antarctica were studied to clarify their features in relation to paleoenvironmental changes, together with carbon-14 dating by Tandetron accelerator mass spectrometry. Namazu Ike sediment core was mainly composed of algal(mainly cyanobacteria) and aquatic moss debris, whereas O-ike sediment core was comprised of coarse and fine sands with the influence of algal(mainly cyanobacteria) debris. The ages of core bottoms of Namazu Ike and O-ike were estimated to be 1550 and 2330 years before present(yBP), respectively. The sedimentation rates of Namazu Ike and O-ike were calculated to be 30 and 59 years/cm, respectively. Very high total organic carbon(TOC) contents(average 24.5%) of Namazu Ike revealed that the sediment core was mainly composed of organic matter. Dramatic increase of TOC/total nitrogen ratios at a depth of 25cm in Namazu Ike strongly suggests that aquatic moss increased from 1100yBP to the core top. Changes in n-alkanes, n-alkanoic and n-alkenoic acids, and sterol compositions in the O-ike sediment core, suggest that microbial composition changed considerably, but their source organisms are not clear and further studies are required.},
 pages = {51--62},
 title = {Environmental changes in Syowa Station area of Antarctica during the last 2300 years inferred from organic components in lake sediment cores},
 volume = {19},
 year = {2006}
}