Variation in Colony Size of Microcystis aeruginosa in a Eutrophic Lake during Recruitment and Bloom Formation
Variation in Colony Size of Microcystis aeruginosa in a Eutrophic Lake during Recruitment and Bloom Formation
复制标题
富营养化湖泊中铜绿微囊藻招募和水华形成过程中菌落大小的变化
DOI：
10.1080/02705060.2010.9664375
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发表时间：
2010-09-01
影响因子：
1.3
通讯作者：
Yang, Zhou
中科院分区：
文献类型：
--
作者：
Cao, Huansheng;Yang, Zhou
摘要研究了3 ~ 6月太湖铜绿微囊藻在繁殖和开花形成期间菌落大小的变化。在整个研究期间，单细胞保持在相同的水平，占总单位的30%至40%。小于20个细胞的小群体也构成了招募群体的主要部分，直到4月中旬才观察到大于20个细胞的大群体。只有在5月才偶尔观察到由100到200个细胞组成的更大的菌落，但在6月湖面形成水华时却很常见，这表明由数百或数千个细胞组成的菌落是形成水华所必需的。虽然大菌落数量较少，但这些大菌落的细胞数占总数的90%以上。从5月开始，每菌落的平均细胞数显著增加，6月达到120多个，与开花形成时间一致。
ABSTRACT Variation in colony size of Microcystis aeruginosa was investigated in Lake Taihu during recruitment and bloom formation from March to June. Single cells remained at the same level throughout the study period, making up between 30 and 40% of total units. Small colonies of < 20 cells also constituted a major part of the recruited population, and larger colonies with >20 cells were not observed until mid-April. Much larger colonies composed of >200 cells were only observed occasionally in May but were frequent in June when a surface bloom formed in the lake, suggesting that colonies consisting of hundreds or thousands of cells are necessary to form blooms. Although the number of large colonies was small, the cells of these large colonies accounted for over 90% of the total population. The mean number of cells per colony increased significantly from May and reached over 120 in June, which coincided with bloom formation.