摘要
为研究隆线溞(Daphnia carinata)、锯缘真剑水蚤(Eucyclops serrulatus)及中华薄壳介(Dolerocypris sinensis)3种甲壳纲动物种群与萼花臂尾轮虫(Brachionus calyciflorus)种群的相互关系,作者分别将其以不同接种密度与萼花臂尾轮虫(接种密度为350 ind/L)进行混合培养。轮虫种群密度增长率自混合培养后的第3或4天开始下降,且随着甲壳纲动物接种密度的增加轮虫种群受到的抑制作用增大。当轮虫接种密度为350 ind/L时,3种甲壳纲动物的种群变化有所不同:(1)当隆线溞起始密度低于150 ind/L时,其种群生长受到轮虫的明显抑制;而当隆线溞起始密度达到350 ind/L时,其在混合培养与单独培养下的种群变化基本一致,这表明轮虫对隆线溞种群生长无抑制作用。(2)与隆线溞不同,锯缘真剑水蚤和中华薄壳介在混合培养下的种群数量持续增长。但与锯缘真剑水蚤相比,中华薄壳介在混合培养下的种群增长速度较慢。
In this study, three species of crustacean zooplankton i.e. Daphnids（Daphnia carinata）, Cyclopoida（Eucyclops serrulatus）, and Ostracods（Dolerocypris sinensis） were selected to investigate their interspecific relationship between each of them with Rotifers（Brachionus calyciflorus）. Each species of Crustacean zooplankton was cultured at seven initial densities with Rotifers at density of 350 ind/L. The principal response curve（PRC） and multiple comparisons were employed to indicate the effects of crustacean zooplankton on Rotifer. The population of Rotifer was suppressed by all these three species of crustacean zooplankton. The suppression was enhanced with increasing of their initial inoculation density. The suppression appeared on the fourth day after inoculating of Daphnid at the highest density and the eighth day after inoculating of Daphnid at the lowest density（Table 1）. Moreover, the population difference of Rotifer between mixed cultivation group and mono-cultured group reached the largest on the eleventh day, and then decreased as the prolongation of culture time（Fig. 1）. The similar phenomenon existed between Cyclopoida and Rotifer in which, the suppression of Rotifer appeared on the fourth day（Table 2）, and the difference in population between mixed cultivation group and mono-cultured group reached the largest on the ninth day（Fig. 3）. Similarly, Table 3 and Fig. 5 showed the population changes of Rotifer as it mixed with Ostracod. The suppression of Rotifer appeared on the third day（Table 3） and the difference in population of Rotifer between mixed and mono-cultured reached the largest on the eighth day（Fig. 5）. The population of Daphnid, Cyclopoida, and Ostracod changed differently compared with their respective controls, as they were cultured with the Rotifer. For Daphnid, at initial density lower than 150 ind/L, its population was inhibited by the Rotifer, but the population was not affected by Rotifer at initial density higher than 200 ind/L（Fig. 2）. However, both populations of the Cyclopoida and the Ostracod were promoted as they were cultured with the Rotifer at all the inoculating density（Fig. 4 and Fig. 6）. Our results together suggested a competitive relationship existed between the Daphnid and the Rotifer, and the relationships between the Ostracod and Rotifer and that between the Cyclopoida and Rotifer were not competitive.
出处
《动物学杂志》
CAS
CSCD
北大核心
2016年第4期561-572,共12页
Chinese Journal of Zoology
基金
浙江省自然科学基金项目(No.LY12B07008)
关键词
隆线溞
萼花臂尾轮虫
锯缘真剑水蚤
中华薄壳介
相互作用
Daphnia carinata
Brachionus calyciflorus
Eucyclops serrulatus
Dolerocypris sinensis
Interspecific interaction
