CEREMA DTer IdF, Département Ville durable, 12 rue Teisserenc de Bort, 78197 Trappes-en-Yvelines, France; Laboratory of Aquatic Ecology, Evolution and Conservation, University of Leuven, Ch. Debériotstraat 32, BE-3000 Leuven, Belgium.
Laboratory of Aquatic Ecology, Evolution and Conservation, University of Leuven, Ch. Debériotstraat 32, BE-3000 Leuven, Belgium.
Chemosphere. 2015 Jun;128:148-54. doi: 10.1016/j.chemosphere.2015.01.044. Epub 2015 Feb 17.
Heat waves are generally associated with an increased energy consumption and could thus increase the vulnerability to subsequent pesticide exposure. We investigated the combined effect of a heat wave and subsequent exposure to the pesticide chlorpyrifos in Ischnura elegans damselfly larvae. To assess local thermal adaptation to heat waves, we applied these combined stressors on replicated low- and high-latitude populations in Europe. Unexpectedly, we observed positive sublethal effects of the heat wave: fat content and phenoloxidase activity increased. Chlorpyrifos had strong negative effects on survival, growth rate, and fat content, while phenoloxidase activity increased; these effects between latitudes were found similar. We found little indication of a higher ability to withstand a heat wave in southern larvae. We did detect a synergistic negative effect on AChE activity. This result highlights the importance of considering delayed effects of extreme temperature events when assessing the impact of pesticides under climate change.
热浪通常与能源消耗增加有关，因此可能会增加随后接触杀虫剂的脆弱性。我们研究了热浪和随后接触杀虫剂毒死蜱对伊蚊幼虫的综合影响。为了评估对热浪的局部热适应，我们在欧洲的低纬度和高纬度种群中重复应用了这些综合胁迫因素。出乎意料的是，我们观察到热浪的亚致死效应呈阳性：脂肪含量和酚氧化酶活性增加。毒死蜱对存活率、生长率和脂肪含量有很强的负面影响，而酚氧化酶活性增加；在纬度之间发现这些影响相似。我们几乎没有发现南方幼虫具有更高的承受热浪能力的迹象。我们确实发现了对 AChE 活性的协同负面影响。这一结果强调了在评估气候变化下杀虫剂的影响时，考虑极端温度事件的延迟效应的重要性。
