Effects of colonial Microcystis aeruginosa and interspecific competition on the population dynamics and resting egg formation of two cladocerans
Effects of colonial Microcystis aeruginosa and interspecific competition on the population dynamics and resting egg formation of two cladocerans
复制标题
铜绿微囊藻群落和种间竞争对两种枝角动物种群动态和休眠卵形成的影响
DOI：
10.1080/02705060.2013.873882
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发表时间：
2014
影响因子：
1.3
通讯作者：
Li Fang
中科院分区：
文献类型：
--
作者：
Shao Yuanqi;Deng Daogui;Meng Meiru;Zhang Xiaoli;Li Fang
我们研究了铜绿微囊藻和种间竞争对两种枝角类种群动态和休眠卵形成的影响。在单种培养实验中，高M。铜绿素浓度有利于红藻的种群增长，但对隆突水蚤的种群增长有强烈的抑制作用。小体型M。大体D以irrasa占优势。无论有没有殖民地M，隆突。混合培养中的铜绿假单胞菌。人均累计内翻次数和内翻占D的百分比。角化卵数均从0增加到10 mg/Lm以下。铜绿假单胞菌在单种培养中呈下降趋势，在混合培养中呈下降趋势。但是，人均累积的幻觉数为Fm。在M值较高时，混合培养比单种培养效果好。铜绿假球衣。FM的影响。铜绿假单胞菌、种间竞争以及它们的组合对两种枝角类的人均累积吸虫数有显著影响。其发生与两种的种群密度较高有关。我们的结果表明，种间竞争抑制了大型枝角类(D.carinata)在丛生M存在下的休眠卵的产生和休眠卵的形成。铜绿假单胞菌。
We investigated the effects of colonialMicrocystis aeruginosaand interspecific competition on the population dynamics and resting egg formation of two cladocerans. In the single-species culture experiments, highM. aeruginosaconcentrations favored the population growth ofMoina irrasabut strongly inhibited that ofDaphnia carinata. Small-bodiedM. irrasawas predominant over large-bodiedD. carinataregardless of the presence of the colonialM. aeruginosain the mixed cultures. The per capita cumulative number of ephippia and the percentage of ephippia containingD. carinataresting eggs both increased from under 0 to 10 mg/LM. aeruginosain the single-species culture but decreased in the mixed culture. However, the per capita cumulative ephippia number ofM. irrasain the mixed culture was higher than those in the single-species culture at the highM. aeruginosalevels. The effects ofM. aeruginosa, interspecific competition, and their combination on the per capita cumulative ephippia numbers of the two cladocerans were significant. The occurrence of ephippia was related to the higher population density of the two species. Our results suggest that interspecific competition inhibits the ephippium production and resting egg formation of the large-bodied cladocerans (D. carinata) in the presence of colonialM. aeruginosa.