实验室新闻

    科研进展

    实验室公告

    学术活动公告

 
[ENVIRONMENTAL POLLUTION],卷: 254 子辑: B 文献号: UNSP 113071
 点击数:56次 添加时间:  [关闭] [收藏]

作者:Dai, WC (Dai, Wencai) ; Slotsbo, S (Slotsbo, Stine) ; Damgaard, C (Damgaard, Christian) ; Ke, X (Ke, Xin); Wu, LH (Wu, Longhua) ; Holmstrup, M (Holmstrup, Martin)

 

题目:Synergistic interaction between effects of phenanthrene and dynamic heat stress cycles in a soil arthropod

 

刊物:ENVIRONMENTAL POLLUTION,卷: 254  子辑: B   文献号: UNSP 113071

DOI: 10.1016/j.envpol.2019.113071

出版年: NOV 2019

 

摘要:

Climatic stressors and chemicals should not be treated as isolated problems since they often occur simultaneously, and their combined effects must be evaluated including their possible interactive effects. In the present study we subjected springtails (Folsomia candida) to combined exposure to phenanthrene and dynamic heat cycles in a full factorial experiment. In a microcosm experiment, we studied the population growth of springtails subjected to a range of sub-lethal concentrations of phenanthrene. During the 28-day experiment we further subjected microcosms to varying numbers of repeated dynamic heat cycles (0-5 cycles) simulating repeated heat waves. We found a synergistic interaction between the effects of phenanthrene and the number of heat waves on both body mass of adults and juvenile production of F. candida showing that the negative effects of phenanthrene were intensified when animals were heat stressed, and/or vice versa. This interaction was not related to internal concentrations of phenanthrene in adult springtails, nor was it due to altered degradation of phenanthrene in soil. We argue that both phenanthrene (by its partitioning into membrane bilayers) and heat have detrimental effects on the physical conditions of cellular membranes in a dose-dependent manner, which, under extreme circumstances, can increase membrane fluidity to a level which is sub-optimal for normal membrane functioning. We discuss the possibility that the synergistic interactions subsequently reduce life-history parameters such as growth and reproduction. (C) 2019 Elsevier Ltd. All rights reserved.

 

版权所有:中国科学院南京土壤研究所 苏ICP备05004320号 地 址:江苏省南京市北京东路71号 邮编:210008 网站管理