Microbial biomass and community composition in boreal lake sediments
Microbial biomass and community composition in boreal lake sediments
复制标题
DOI：
10.4319/lo.2011.56.2.0725
复制
发表时间：
2011-03
影响因子：
4.5
通讯作者：
K. Steger;K. Premke;C. Gudasz;I. Sundh;L. Tranvik
中科院分区：
文献类型：
--
作者：
K. Steger;K. Premke;C. Gudasz;I. Sundh;L. Tranvik
本研究利用磷脂脂肪酸（PLFA）测定了8个不同外来有机碳和总磷（TP）负荷量的北方湖泊沉积物中微生物的生物量和群落结构。PLFA总浓度（微生物生物量的估算值）更多地依赖于TP（上层初级生产的代表），而不依赖于溶解有机碳（陆地有机碳输入的代表）。PLFAs的组成随时间变化很大，显示了微生物群落组成的季节性动态。在比较各湖泊和季节PLFA剖面时，群落组成在季节内比在湖泊内更相似。
We used phospholipid fatty acids (PLFA) to determine microbial biomass and community structure in the sediments of eight boreal lakes with different loadings of allochthonous organic carbon and total phosphorus (TP) in the water during the course of a year. The total concentration of PLFA, an estimate of the microbial biomass, depended more on TP, a proxy for pelagic primary production, but not on dissolved organic carbon, a proxy for terrestrial organic carbon input. The composition of PLFAs varied considerably over time, demonstrating seasonal dynamics in microbial community composition. When PLFA profiles in all lakes and seasons are compared, community composition is more similar within season than within lakes.