The microbial loop at the surface of a peatland: Structure, function, and impact of nutrient input
The microbial loop at the surface of a peatland: Structure, function, and impact of nutrient input
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DOI：
10.1007/s002489900062
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发表时间：
1998-01-01
影响因子：
3.6
通讯作者：
Francez, AJ
中科院分区：
文献类型：
--
作者：
Gilbert, D;Amblard, C;Francez, AJ
本研究的目的是评估的结构和功能的微生物循环在法国地块中部的泥炭地，和施肥对不同的微生物群落的影响。生物量方面，有壳阿米巴（48%的总微生物生物量），异养细菌（15%），蓝藻（14%）和硅藻（13%）是微生物的优势群体。其他微藻（7%），纤毛虫（2%）和异养鞭毛虫（1%）只占总微生物生物量的比例很低。异养微生物的相对重要性高于海洋或湖泊环境。此外，纤毛虫和异养鞭毛虫只占原生动物总生物量的一小部分，这是严重占主导地位的有遗嘱阿米巴。因此，在亚水生泥炭地的原生生物群落的结构是完全不同的报告湖泊或海洋环境。在其他方面，营养物质（PKCa和NPKCa）的供应导致异养细菌，硅藻和纤毛虫的相对生物量的增加，并通过减少有壳变形虫和其他微藻的相对比例。
The aim of this study was to assess the structure and function of the microbial loop in a peatland of the French Massif central, and the impact of fertilization on the different microbial communities.In terms of biomass, testate Amoeba (48% of the total microbial biomass), heterotrophic bacteria (15%), cyanobacteria (14%) and Bacillariophyceae (13%) were the dominant groups of microorganisms. Other microalgae (7%), ciliates (2%) and heterotrophic flagellates (1%) accounted for only a low proportion of total microbial biomass. The relative importance of heterotrophic microorganisms was higher than in marine or lacustrine environments. In addition, ciliates and heterotrophic flagellates only constituted a small proportion of the total protozoan biomass, which was heavily dominated by testate amoeba. Thus, the structure of the protist community in the subaquatic peatland was completely different from that reported for lakes or marine environments. In other aspects, the supply of nutrients (PKCa and NPKCa) resulted in increases of the relative biomasses of heterotrophic bacteria, Bacillariophyceae, and ciliates and by a decrease in the relative proportion of testate amoeba and of other microalgae.