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- Title
Relationships between temperature change and microbial amount in inactive ice wedges in Yitulihe, Northeast China.
- Authors
Yang, S. Z.; Jin, H. J.; Wen, X.; Luo, D. L.; Yu, S. P.
- Abstract
Ice-wedge is an indicator of paleoclimate change. The δ18 O concentration in different layers could reflect the change of paleotemperature during ice-wedge growth. In the late 1980s, inactive ice wedges were found in Yitulihe, Northeast China, which were the south-most ones so far and were important in climatic and environmental research. In this paper, the δ18O concentration and microbial number in the inactive ice-wedges were analyzed by using stable isotope, fluorescence microscopy counting, and flow cytometer (FCM). During the ice-wedge growth in Yitulihe area, there were three short-term paleotemperature fluctuation, and three times of fluctuation in microbial amount in different ice-wedge layer. Correlation analysis indicated that there was a converging relationship between the temperature change and microbial amount in the ice-wedges. The lower the temperature when ice-wedge layer formed, the less the microbes survived in the layer.
- Subjects
CHINA; GLOBAL temperature changes; PALEOCLIMATOLOGY; CLIMATE research; ENVIRONMENTAL research; STATISTICAL correlation; ISOTOPES; FLUORESCENCE microscopy; BACTERIA
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2009, Vol 20, Issue 11, p2785
- ISSN
1001-9332
- Publication type
Article