Interactions between red tide microalgae and herbivorous zooplankton: effects of two bloom-forming species on the rotifer Brachionus plicatilis (O.F. Muller)
Interactions between red tide microalgae and herbivorous zooplankton: effects of two bloom-forming species on the rotifer Brachionus plicatilis (O.F. Muller)
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DOI：
10.1007/s10750-007-9237-4
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发表时间：
2008-03
期刊：
影响因子：
2.6
通讯作者：
Zhihao Xie;Hui Xiao;Xue-Xi Tang;Kai-hong Lu;Hengjiang Cai
中科院分区：
文献类型：
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作者：
Zhihao Xie;Hui Xiao;Xue-Xi Tang;Kai-hong Lu;Hengjiang Cai
采用单一培养和混合培养的方法研究了褶皱臂尾轮虫（Brachionus plicatilis）与两种赤潮藻（HAB）的种间相互作用。比较了两种藻在不同藻细胞密度下的增殖情况。结果表明，B.褶皱藻能从塔玛亚历山大藻中获得足够的营养支持种群的净增长。当暴露于8 × 104个细胞ml−1A的密度时。tamarense，B.当藻密度分别为16 × 104、24 × 104、32 × 104和40 × 104 cells ml-1时，褶皱藻的增殖速度最快。A. tamarense由于B.褶皱而赤潮异弯藻对B.轮虫取食对褶皱虫种群的形成和生长影响不大。在这种情况下，B。皱襞形成减少，H. akashiwogrew以类似于不添加轮虫的对照的速率。混合培养试验表明，A. tamarensec可部分抵消H. akashiwoin限制了轮虫种群的增长速度。此外，还研究了不同初始细胞密度对A. tamarenseandH.还研究了Akashiwoin混合培养物。结果表明，A. tamarens在A. tamarenseandH. akashiwowere 40：5和40：30。
Experiments were carried out to investigate interspecific interactions between the rotiferBrachionus plicatilisand two harmful algal bloom (HAB) species using single and mixed culture methods.B. plicatilispopulations and the growth of two algae were compared at different algal cell densities. The results demonstrate thatB. plicatilisobtained sufficient nutrition fromAlexandrium tamarenseto support net population increase. When exposed to a density of 8 × 104cells ml−1A. tamarense, the number ofB. plicatilisincreased faster than it did when exposed to other four algal densities (16 × 104, 24 × 104, 32 × 104, and 40 × 104cells ml−1). Cell densities ofA. tamarensedecreased due to the grazing ofB. plicatilis. In contrast,Heterosigma akashiwohad an adverse effect on theB. plicatilispopulation and its growth was largely unaffected by rotifer grazing. In this case, theB. plicatilispopulation decreased andH. akashiwogrew at a rate similar to that of a control without addition of rotifers. Mixed culture experiments showed thatA. tamarensecould partly counteract the effect ofH. akashiwoin limiting the rate of population increase of rotifer. In addition, the effect of different initial cell densities on interspecific competition betweenA. tamarenseandH. akashiwoin mixed culture(s) was also investigated. The results show thatA. tamarensecompeted very successfully when the inoculation proportions ofA. tamarenseandH. akashiwowere 40:5 and 40:30.