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Letter to the Editor

机译:给编辑的信

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摘要

A survey spanning 20 years (1991 to 2012) of the species and concentration of phytoplankton in the freshwater lake the Little Sea in Studland Dorset was published in the Quekett Journal of Microscopy (1). In this report I made the comment that that no alga had reached a bloom condition. This was premature; during October/ November of 2013 the green alga (chlorophyte) Closteriopsis acicularis reached a concentration of 40,000 cells/ml in February and gave the water a greenish-straw tint. This alga had been seen previously over some years but at peak concentrations some 10 times lower. Closteriopsis cells are about 130 microns long, curved or straight, tapering to fine points and about 4 microns maximum diameter. I think this concentration might be called a 'bloom' in so far as it coloured the water, although calculation showed that it is not very crowded even at such high concentration: even taking the longer dimension the algae are still separated by an average of 2 times their length.
机译:Quekett Journal of Microscopy(1)发表了一项为期20年(1991年至2012年)的调查,该调查涵盖了Studland Dorset的Little Sea淡水湖中浮游植物的种类和浓度。在此报告中,我评论说没有藻类达到开花状态。这还为时过早;在2013年10月/ 11月,绿藻(绿藻)球状梭菌在2月达到了40,000个细胞/毫升的浓度,并使水呈绿色稻草色。这种藻类曾在几年前被发现过,但峰值浓度却低了十倍。梭菌细胞长约130微米,弯曲或笔直,渐细至细点,最大直径约4微米。我认为,这种浓度可以给水上色,因此可以称其为“花开”,尽管计算表明即使在如此高的浓度下,它也不是很拥挤:即使采用更长的尺寸,藻类仍然平均隔开2乘以它们的长度。

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