Carbon and nitrogen limitation of soil microbial respiration in a High Arctic successional glacier foreland near Ny-Ålesund, Svalbard

Polar research

Takayuki Nakatsubo¹  Shinpei Yoshitake²  Hiroshi Koizumi³  Masaki Uchida⁴ 

[1] Graduate School of Biosphere Science, Hiroshima University, 7-1 Kagamiyama 1-chome, Higashi-Hiroshima, 739-8521 Japan;Graduate School of Biosphere Science, Hiroshima University, JapanCorrespondence;Institute for Basin Ecosystem Studies, Gifu University, Gifu, 501-1193 Japan;National Institute of Polar Research, 9-10, Kaga 1-chome, Itabashiku, Tokyo, 173-851 Japan

关键词: High Arctic;    microbial biomass;    microbial respiration;    PLFA;    primary succession;    substrate limitation.;   

DOI  :  10.1111/j.1751-8369.2007.00001.x

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

The hypotheses that carbon and nitrogen availability limit microbial activity, and that the key factors limiting microbes vary along the successional gradient were tested in a High Arctic glacier foreland. We examined the responses of the respiration rate and the phospholipid fatty acid content to the addition of carbon and/or nitrogen. Soil samples were collected from the early stage and late stage of primary succession in the foreland of a glacier near Ny-Ålesund, Svalbard. The addition of both carbon (glucose) and nitrogen (ammonium nitrate) engendered an increase in the microbial respiration rate in the early stage of succession. In contrast, the addition of either carbon or nitrogen did not increase the microbial respiration rate. In the late stage of succession the addition of carbon alone, as well as the addition of both carbon and nitrogen, increased the microbial respiration rate. However, neither the addition of carbon nor the addition of nitrogen affected the total phospholipid fatty acid conte...

【 授权许可】

CC BY-NC