Comparison of cyanobacterial and green algal growth rates at different temperatures
Comparison of cyanobacterial and green algal growth rates at different temperatures
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DOI：
10.1111/j.1365-2427.2012.02866.x
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发表时间：
2013-03-01
影响因子：
2.7
通讯作者：
Huszar, Vera L. M.
中科院分区：
文献类型：
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作者：
Lurling, Miquel;Eshetu, Fassil;Huszar, Vera L. M.
1.通过在六种不同温度（2035℃）下对八种蓝藻和八种叶绿藻进行对照实验并进行文献调查，检验了蓝藻比叶绿藻具有更高的最适生长温度和更高的最佳生长速率的假设。 2.在实验中，除了叶绿藻Monoraphidium minutum之外的所有生物在35℃以下都生长良好。叶绿藻莱茵衣藻是整个温度范围（2035℃）内生长最快的生物。 3.蓝藻的平均最适生长温度为29.2摄氏度，叶绿藻的平均最适生长温度为29.2摄氏度。这些结果与已发表的数据一致，蓝藻的平均最适生长温度（27.2 摄氏度）略高于叶绿藻的平均最适生长温度（26.3 摄氏度）。 4.蓝藻在20℃时的平均生长率(0.42day1)显着低于叶绿藻在20℃时的平均生长率(0.62day1)。然而，在所有其他温度下，蓝藻和叶绿藻的平均生长速率没有差异。 5.最适温度下蓝藻(0.92day1)和叶绿藻(0.96day1)的平均生长速率相似。然而，对已发表数据的分析表明，在最适温度下，蓝藻的生长速度（0.65天1）显着低于叶绿藻的生长速度（0.93天1）。 6.虽然气候变暖可能会导致蓝藻大量繁殖，但我们的研究结果表明，这可能不是因为蓝藻比其叶绿藻竞争对手具有更高的生长率。蓝藻的竞争优势更可能归因于它们垂直迁移的能力，以及防止在温暖和分层更强的水域中沉积的能力，以及它们对放牧的抵抗力，特别是当变暖减少浮游动物体型时。
1.The hypothesis that cyanobacteria have higher optimum growth temperatures and higher growth rates at the optimum as compared to chlorophytes was tested by running a controlled experiment with eight cyanobacteria species and eight chlorophyte species at six different temperatures (2035 degrees C) and by performing a literature survey. 2.In the experiment, all organisms except the chlorophyte Monoraphidium minutum grew well up to 35 degrees C. The chlorophyte Chlamydomonas reinhardtii was the fastest-growing organism over the entire temperature range (2035 degrees C). 3.Mean optimum growth temperatures were similar for cyanobacteria (29.2 degrees C) and chlorophytes (29.2 degrees C). These results are concordant with published data, yielding slightly higher mean optimum growth temperatures for cyanobacteria (27.2 degrees C) than for chlorophytes (26.3 degrees C). 4.Mean growth rates of cyanobacteria at 20 degrees C (0.42day1) were significantly lower than those of chlorophytes at 20 degrees C (0.62day1). However, at all other temperatures, there were no differences between mean growth rates of cyanobacteria and chlorophytes. 5.Mean growth rates at the optimum temperature were similar for cyanobacteria (0.92day1) and chlorophytes (0.96day1). However, analysis of published data revealed that growth rates of cyanobacteria (0.65day1) were significantly lower than those of chlorophytes (0.93day1) at their optimum temperatures. 6.Although climate warming will probably lead to an intensification of cyanobacterial blooms, our results indicate that this might not be as a result of higher growth rates of cyanobacteria compared with their chlorophyte competitors. The competitive advantage of cyanobacteria can more likely be attributed to their ability to migrate vertically and prevent sedimentation in warmer and more strongly stratified waters and to their resistance to grazing, especially when warming reduces zooplankton body size.