Wuerthner Vanessa P, Jaeger Jared, Garramone Paige S, Loomis Connor O, Pecheny Yelena, Reynolds Rachel, Deluna Lindsey, Klein Samantha, Lam Michael, Hua Jessica, Meindl George A
Biological Sciences Department Binghamton University (SUNY) Binghamton New York.
Ecol Evol. 2019 Jan 10;9(3):1182-1190. doi: 10.1002/ece3.4807. eCollection 2019 Feb.
Pesticides are a ubiquitous contaminant in aquatic ecosystems. Despite the relative sensitivity of aquatic species to pesticides, growing evidence suggests that populations can respond to pesticides by evolving higher baseline tolerance or inducing a higher tolerance via phenotypic plasticity. While both mechanisms can allow organisms to persist when faced with pesticides, resource allocation theory suggests that tolerance may be related to resource acquisition by the organism. Using , we investigated how algal resource availability influenced the baseline and inducible tolerance of to a carbamate insecticide, carbaryl. Individuals reared in high resource environments had a higher baseline carbaryl tolerance compared to those reared in low resource environments. However, from low resource treatments exposed to sublethal concentrations of carbaryl early in development induced increased tolerance to a lethal concentration of carbaryl later in life. Only individuals reared in the low resource environment induced carbaryl tolerance. Collectively, this highlights the importance of considering resource availability in our understanding of pesticide tolerance.
农药是水生生态系统中普遍存在的污染物。尽管水生物种对农药相对敏感，但越来越多的证据表明，种群可以通过进化出更高的基线耐受性或通过表型可塑性诱导出更高的耐受性来应对农药。虽然这两种机制都能使生物体在面对农药时存活下来，但资源分配理论表明，耐受性可能与生物体的资源获取有关。通过……，我们研究了藻类资源的可利用性如何影响……对氨基甲酸酯类杀虫剂西维因的基线耐受性和诱导耐受性。与在低资源环境中饲养的个体相比，在高资源环境中饲养的个体对西维因具有更高的基线耐受性。然而，在发育早期接触亚致死浓度西维因的低资源处理组的……在生命后期对致死浓度的西维因诱导出了更高的耐受性。只有在低资源环境中饲养的个体诱导出了对西维因的耐受性。总的来说，这突出了在我们理解农药耐受性时考虑资源可利用性的重要性。
