BACTERIAL BIOMASS AND CELL-SIZE DISTRIBUTIONS IN LAKES - MORE AND LARGER CELLS IN ANOXIC WATERS
BACTERIAL BIOMASS AND CELL-SIZE DISTRIBUTIONS IN LAKES - MORE AND LARGER CELLS IN ANOXIC WATERS
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DOI：
10.4319/lo.1993.38.8.1627
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发表时间：
1993-12-01
影响因子：
4.5
通讯作者：
STEINHART, GS
中科院分区：
文献类型：
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作者：
COLE, JJ;PACE, ML;STEINHART, GS
我们测量了来自美国三个地区的20个分层湖泊的细菌丰度、细胞大小分布以及相关的微生物和地球化学参数。最大的细胞大小和最大的细菌丰度发生在缺氧水域。含氧量低的湖泊的细菌大小分布与地表水的相同。在缺氧和缺氧条件下，缺氧水培养的细菌比缺氧水培养的细菌大2-10倍，细胞大小与温度无关。在所有湖泊和地层中，细菌丰度与总磷（TP）浓度密切相关。细胞大小与TP或细菌丰度无关，提示丰度和大小可能受到不同过程的调节。细菌生物量（根据平均细胞大小和细菌丰度的乘积计算）在缺氧水体中通常比在缺氧水体中大4倍。
We measured bacterial abundance, cell size distribution, and related microbiological and geochemical parameters in 20 stratified lakes from three regions in the U.S. Both largest cell size and greatest bacterial abundance occurred in anoxic waters. Bacterial size distributions from the hypolimnia of lakes that were oxic were identical to those in surface waters. Bacteria from anoxic hypolimnia were 2-10 times larger than those from oxic water and cell size was independent of temperature under either oxic or anoxic conditions. For all lakes and strata, bacterial abundance was strongly related to the concentration of total phosphorus (TP). Cell size was not related to TP or to bacterial abundance, suggesting that abundance and size may be regulated by different processes. Bacterial biomass (calculated from the product of mean cell size and bacterial abundance) was typically 4 times greater in anoxic than in oxic waters of lakes.