Combined exposure to parasite and pesticide causes increased mortality in the water flea Daphnia
Combined exposure to parasite and pesticide causes increased mortality in the water flea Daphnia
复制标题
DOI：
10.1007/s10452-012-9397-9
复制
发表时间：
2012-05
期刊：
影响因子：
1.8
通讯作者：
Claudia C. Buser;Mieke Jansen;Kevin Pauwels;L. Meester;P. Spaak
中科院分区：
文献类型：
--
作者：
Claudia C. Buser;Mieke Jansen;Kevin Pauwels;L. Meester;P. Spaak
生物体暴露在多种生物和非生物环境应激源中，这会影响个体种群和群落的动态。种群也可能从基因上适应自然(如疾病)和人为(如化学污染)压力。在本研究中，我们研究了水蚤同时接触寄生虫(即生物)和杀虫剂(即非生物)的适合度结果。此外，我们还调查了这些适合度结果是否随着种群的进化而变化。因此，我们在多因素实验中，将从自然休眠卵库不同时间层分离的休眠卵子孵化出的大型克隆幼虫暴露于寄生虫巴氏杆菌和杀虫剂二氮磷。虽然我们由于未知原因进行的实验性治疗未能在水蚤中引发疾病症状，但我们确实观察到了水蚤存活率的下降。当同时接触寄生虫和杀虫剂时，马格纳。没有观察到暴露在个体应激源下的死亡率增加。在暴露于应激源时，我们没有观察到来自不同时间水平孵化的水蚤无性系在适应性反应方面的进化变化。
Organisms are exposed to multiple biotic and abiotic environmental stressors, which can influence the dynamics of individual populations and communities. Populations may also genetically adapt to both natural (e.g. disease) and anthropogenic (e.g. chemical pollution) stress. In the present study, we studied fitness consequences of exposure to both a parasite (i.e. biotic) and a pesticide (i.e. abiotic) for the water fleaDaphnia.In addition, we investigated whether these fitness consequences change through time as a population evolves. Thus, we exposedDaphnia magnaclones, hatched from dormant eggs isolated from different time layers of a natural dormant egg bank, to the parasitePasteuria ramosaand the insecticide diazinon in a multifactorial experiment. While our experimental treatments for unknown reasons failed to induce disease symptoms in theDaphnia, we did observe a reduced survival ofD. magnawhen simultaneously exposed to both the parasite and the pesticide. No increased mortality upon exposure to individual stressors was observed. We did not observe an evolutionary change in fitness response of theDaphniaclones hatched from different time horizons upon exposure to stressors.