Whether and to which extent the effects of chemicals in the environment interact with other factors remains a scientific challenge. Here we assess the combined effects of temperature (16 vs. 20°C), light conditions (darkness vs. 400 lx), dissolved organic matter (DOM; 0 vs. 6 mg/L) and the model insecticide thiacloprid (0 vs. 3 µg/L) in a full-factorial experiment on molting and leaf consumption of Gammarus fossarum. Thiacloprid was the only factor significantly affecting gammarids’ molting. While DOM had low effects on leaf consumption, temperature, light and thiacloprid significantly affected this response variable. The various interactions among these factors were not significant suggesting additivity. Only the interaction of the factors temperature and thiacloprid suggested a tendency for antagonism. As most stressors interacted additively, their joint effects may be predictable with available models. However, synergistic interactions are difficult to capture while being central for securing ecosystem integrity.

化学物质对环境的影响是否以及在何种程度上与其他因素相互作用仍然是科学挑战。在这里，我们评估了温度（16 vs. 20°C），光照条件（黑暗vs. 400 lx），溶解的有机物（DOM； 0 vs. 6 mg / L）和模型杀虫剂噻虫啉（0 vs. 20 mg / L）的综合影响。 3 µg / L）全基因实验，研究了镰刀菌的蜕皮和叶片消耗。噻虫啉是唯一显着影响γ甲虫蜕皮的因素。尽管DOM对叶片消耗量的影响较小，但温度，光照和噻虫啉显着影响该响应变量。这些因素之间的各种相互作用并不显着，表明存在可加性。只有温度因素和噻虫啉的相互作用才表明有拮抗作用。由于大多数压力源可加性地相互作用，因此可用可用模型可以预测它们的联合作用。但是，在确保生态系统完整性至关重要的同时，很难捕捉到协同互动。