Combined Effects of Colonial Size and Concentration of Microcystis aeruginosa on the Life History Traits of Daphnia similoides
Combined Effects of Colonial Size and Concentration of Microcystis aeruginosa on the Life History Traits of Daphnia similoides
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DOI：
10.1556/018.66.2015.3.4
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发表时间：
2015-09
影响因子：
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通讯作者：
Xiaoli Zhang;D. Deng;Zhang Kun;Wenping Wang;Ji Lei
中科院分区：
文献类型：
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作者：
Xiaoli Zhang;D. Deng;Zhang Kun;Wenping Wang;Ji Lei
微囊藻群体的大小和浓度对水蚤的生活史特征具有不利影响，但迄今为止它们之间的详细相互作用仍不清楚。我们的实验表明，微囊藻菌落大小和浓度对拟水蚤的成熟时间、预期寿命、净繁殖率和先天增加能力之间的相互作用是显着的。在所有组中，D. similoides在8天内的存活率为100%。然后，该值在微囊藻的大菌落群体和 SH 群体中迅速下降。菌落铜绿显着缩短了拟石竹的成熟时间和成熟时的体长。微囊藻SH组每雌性首次繁殖的后代数量显着高于其他组。 SL组微囊藻的净繁殖率显着高于其他微囊藻组。小菌落微囊藻组的拟似石斑藻先天增殖能力显着高于大菌落组。结果表明，小菌落微囊藻在较低浓度下对水蚤的繁殖有积极作用，而当小菌落微囊藻被水蚤作为食物时，其毒性在较高浓度下增强。
Microcystis colonial size and concentration have detrimental effects on life history traits of Daphnia , but their detailed interactions have remained unclear so far. Our experiments show that the interaction between Microcystis colonial size and concentration on maturation time, life expectancy, net reproductive rate and innate capacity of increase in Daphnia similoides was significant. In all groups, the survival rate of D. similoides was 100% within 8 days. This value then declined quickly in the large-colony groups and in the SH group of Microcystis . Colonial M. aeruginosa significantly reduced the maturation time and body length at maturity of D. similoides . The number of offspring at frst reproduction per female in the SH group of Microcystis was significantly higher than those in other groups. Net reproductive rate of D. similoides in the SL group of Microcystis was significantly higher than those in other groups of Microcystis . The innate capacity of increase of D. similoides in small-colony Microcystis groups was significantly higher than that in the large-colony groups. The results suggested that the effect of small-colony Microcystis on the reproduction of Daphnia was positive under lower concentration, while their toxicity was intensitied under higher concentration when small-colony Microcystis were by Daphnia as food.