画像解析を用いたアオコ形成過程における Microcystis 群体サイズの定量的評価
画像解析を用いたアオコ形成過程における Microcystis 群体サイズの定量的評価
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DOI：
10.2965/jswe.27.69
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发表时间：
2004-01
期刊：
影响因子：
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通讯作者：
K. Ishikawa;Ross Walker;Shigeo Tsujimura;Hiroyuki Nakahara;M. Kumagai
中科院分区：
文献类型：
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作者：
K. Ishikawa;Ross Walker;Shigeo Tsujimura;Hiroyuki Nakahara;M. Kumagai
群体大小是发展藻类水华的一个重要因素。为了确定生长策略中菌落大小和细胞密度之间的关系，从1999年7月至9月在日本琵琶湖南部盆地的北山田渔港对水华蓝藻的生长进行了监测，使用图像分析系统测量了菌落大小。铜绿微囊藻和微囊藻（蓝藻）的细胞密度逐渐增加，在此期间和地表水水华的发展在8月底和9月底，由一个时期的分离没有增长在9月初。然而，平均菌落大小的季节性变化并没有发生一致的细胞密度的季节性变化。大菌落（>300μm）的百分率在9月上旬有所增加，此时两个种的菌落平均直径均达到后峰值。这些结果表明，在细胞密度增加一段时间后，微囊藻的菌落大小可能在其生命周期的静止阶段最大。
Colony size is an important factor in developing algal blooms. For the purpose of determining the relationship between colony size and cell density for growth strategy, the growth monitoring of bloom-forming cyanobacteria was monitered the Kitayamada Fishery Harbor in the southern basin of Lake Biwa from July to September 1999, with colony size measured using an image analysis system. The cell densities of Microcystis aeruginosa and Microcystis wesenbergii (Cyanobacteria) increased gradually during this period and surface-water blooms developed at the end of August and at the end of September, separated by a period of no growth in early September. However seasonal changes in mean colony size did not occur in concordance with seasonal changes in cell density. The percentage of large colonies (>300μm) increased in early September, when the mean diameters of the colonies of both species reached their after peaks. These results suggest than Microcystis colony size is likely to be the largest during a quiescent stage of their life cycle after a period of increased cell density.