COMPETITION FOR PHOSPHORUS BETWEEN DESMIDS 1
COMPETITION FOR PHOSPHORUS BETWEEN DESMIDS 1
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DESMIDS 之间对磷的竞争 1
DOI：
10.1111/j.1529-8817.1988.tb04468.x
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发表时间：
1988
影响因子：
2.9
通讯作者：
Leonard L. Hendzel
中科院分区：
文献类型：
--
作者：
F. Healey;Leonard L. Hendzel
在连续培养对磷酸盐的竞争过程中，Cosmum subcostatum Nord.常规移栽异色球茎线虫。置换速率与细胞密度无关，细胞密度在100-6000个细胞毫升−1之间。这表明，在自然产生的细胞密度的广泛范围内，对营养物质的竞争是重要的。中肋骨条藻对磷的饱和吸收速率较高，但吸收的半饱和值也较高。因此，这两个结合体同样能够在低浓度下吸收磷酸盐。副肋骨条藻的竞争优势在于其单位磷产量较高。在双室恒化器中，两种藻类在共用介质中的生长对吸收和产量特性没有影响。
During competition for phosphate in continuous cultures, Cosmarium subcostatum Nord. routinely displaced Staurastrum paradoxum Meyer. The rate of displacement was independent of cell density between 100 and 6000 cells mL−1. This suggests that competition for nutrients is important over a wide range of naturally occurring cell densities. C. subcostatum had higher saturated rates of phosphate uptake but also higher half saturation values for uptake. As a result, the two desmids were similarly able to take up phosphate at low concentrations. The competitive advantage of C. subcostatum lay in its greater yield per unit of phosphorus. Growth of the two algae in shared medium in a dual‐chamber chemostat had no effect on uptake or yield characteristics.