铜绿微囊藻对轮虫生命表参数和表型特征的影响

发布时间：2018-01-23 04:38

本文关键词： 铜绿微囊藻萼花臂尾轮虫净生殖率世代时间内禀增长率表型特征　出处：《水生生物学报》2017年06期 　论文类型：期刊论文

【摘要】：为评价铜绿微囊藻的有毒(Microcystin-producing Microcystis aeruginosa)、无毒(Microcystin-free M.aeruginosa)品系对轮虫种群增长和表型特征的影响,研究探讨了萼花臂尾轮虫(Brachionus calyciflorus)在不同微囊藻溶液中的生活史参数及形态变化。实验中各处理组单位体积总含碳量为(20.61±0.15)g C/m L,以使轮虫获得等碳量的食物供应。实验组轮虫分别用蛋白核小球藻(Chlorella pyrenoidosa)、斜生栅藻(Scenedesmus obliquus)、有毒和无毒微囊藻溶液单独投喂,并用有毒、无毒蓝藻菌分别与不同绿藻的混合液投喂。生命表实验结果表明,不同微囊藻混合液投喂的轮虫净生殖率R_0(F=102.71,df=32,P0.001)、世代时间T(F=17.05,df=32,P0.001)和内禀增长率r_m(F=18.89,df=32,P0.001)与对照组相比降低1.36%—210.34%。侧棘刺长(F=28.18,df=65,P0.001)和游泳速度(F=181.69,df=65,P0.001)下降2.63%—39.07%,轮虫体长(F=690.04,df=65,P0.001)变化显著。与绿藻投喂的轮虫参数值相比,轮虫的生命表参数和表型特征变化规律随微囊藻溶液浓度改变。萼花臂尾轮虫受到铜绿微囊藻胁迫时,生长繁殖受到抑制并通过改变自身形态以抵御不利的生存环境。
[Abstract]:To evaluate the toxic microcystin-producing Microcystis aeruginosa of Microcystis aeruginosa. Effect of Microcystin-free M. aeruginosa strain on population growth and phenotypic characteristics of rotifers. Brachionus calyciflorus (Brachionus calyciflorus) was studied. The changes of life history parameters and morphology in different microcystis solution showed that the total carbon content per unit volume of each treatment group was 20.61 卤0.15g C / mL. The rotifers in the experimental group were treated with Chlorella pyrenoidosa (Chlorella pyrenoidosa). Scenedesmus obliquusus was fed separately with toxic and nontoxic microcystis solution and toxic. The results of life table experiment showed that the net reproductive rate of rotifers fed with different microcystis was 102.71g / dfn32. (P 0.001), generation time (T _ (F) 17.05d ~ (fl) ~ (32)) and intrinsic rate of increase r _ m _ (F) 18.89 d ~ (fl) ~ (32). Compared with the control group, P0.001 decreased 1.36% -210.34%. The lateral spinous prickly was 28.18 dfU (65% P0.001) and the swimming speed was 181.69 (P < 0.05). Df65P0.001) decreased by 2.63- 39.07, and the rotifer body length was FF690.04dffc65. Compared with the rotifer parameters of green algae. The changes of life surface parameters and phenotypic characteristics of rotifers varied with the concentration of microcystis solution. Growth and reproduction are inhibited and altered to withstand adverse living conditions.
【作者单位】：南京师范大学生命科学学院;
【基金】：国家自然科学基金(31772458和31272388) 江苏省水产三新工程项目(Y2017-35)资助~~
【分类号】：X173;X174
【正文快照】： 铜绿微囊藻(Microcystis aeruginosa)是最为常见的水华蓝藻[1]。有毒(Microcystin-producing M.aeruginosa)和无毒微囊藻(Microcystin-free M.aeru-ginosa)共存于天然水域生态系统中[2]。有毒微囊藻产生的内源性毒素可引起鱼类、鸟类和无脊椎动物中毒死亡[3]。已有关于蓝藻及

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