Temperature-dependent dominance of Microcystis (Cyanophyceae) species: M. aeruginosa and M. wesenbergii
Temperature-dependent dominance of Microcystis (Cyanophyceae) species: M. aeruginosa and M. wesenbergii
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DOI：
10.1093/plankt/fbn110
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发表时间：
2009-02-01
影响因子：
2.1
通讯作者：
Nakano, Shin-ichi
中科院分区：
文献类型：
--
作者：
Imai, Hiroyuki;Chang, Kwang-Hyeon;Nakano, Shin-ichi
通过现场和实验室研究，研究了水温对两种微囊藻（铜绿微囊藻和韦森伯氏微囊藻）演替的影响。 2006年5月至11月，对富营养化的古池池塘中微囊藻种类及相关环境参数进行了季节演替调查。6月、8月至10月初，铜绿微囊藻较M. wesenbergii丰富，7月和10月下旬至11月间，M. wesenbergii较丰富。铜绿微藻占优势期间的水温（24.7~33.9℃）相对韦森氏微藻优势期间（19.6~28.6℃）较高。在不同温度下培养每种微囊藻的实验室实验中，在高温（30和35摄氏度）下，铜绿微囊藻的生长速率显着高于韦森氏微囊藻。然而，在较低温度（20 和 25 摄氏度）下，这两个物种的生长速度相似。因此，夏季水温变化可能是微囊藻物种交替演替的重要环境因素。
The effect of water temperature on the succession of the two Microcystis species, M. aeruginosa and M. wesenbergii, was examined through field and laboratory studies. In the eutrophic Furuike Pond, seasonal successions of Microcystis species and related environmental parameters were investigated between May and November 2006. Microcystis aeruginosa was more abundant than M. wesenbergii in June, August to early October and M. wesenbergii was more abundant in July and between late October and November. The water temperatures during the dominance of M. aeruginosa were relatively higher (from 24.7 to 33.9 degrees C) than those during the dominance of M. wesenbergii (from 19.6 to 28.6 degrees C). In the laboratory experiments where each Microcystis species was cultured under various temperatures, growth rates of M. aeruginosa were significantly higher than those of M. wesenbergii at high temperatures (30 and 35 degrees C). However, growth rates of the two species were similar at lower temperatures (20 and 25 degrees C). Consequently, water temperature changes during summer may be an important environmental factor for the alternating succession of Microcystis species.