LINKING FEEDING INHIBITION WITH REPRODUCTIVE IMPAIRMENT IN GAMMARUS CONFIRMS THE ECOLOGICAL RELEVANCE OF FEEDING ASSAYS IN ENVIRONMENTAL MONITORING

被引:17
作者
Coulaud, Romain [1 ]
Geffard, Olivier [1 ]
Vigneron, Amandine [1 ]
Queau, Herve [1 ]
Francois, Adeline [1 ]
Chaumot, Arnaud [1 ]
机构
[1] Irstea, UR MALY, Villeurbanne, France
关键词
Biomarkers; Biomonitoring; Population modeling; Population-level effects; Ecological risk assessment; IN-SITU BIOASSAYS; LIFE-HISTORY; WATER-QUALITY; ACETYLCHOLINESTERASE ACTIVITY; BIOCHEMICAL RESPONSES; POPULATION-DYNAMICS; RISK-ASSESSMENT; DAPHNIA-MAGNA; CLUTCH SIZE; EGG SIZE;
D O I
10.1002/etc.2886
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The in situ feeding bioassay in Gammarus fossarum is recognized as a reliable tool for monitoring the toxicity of freshwater contamination. However, whether recorded feeding inhibitions can potentially provoke population-level adverse outcomes remains an open question. In the present study, the authors present an experimental study in G. fossarum, which contributes to the quantitative description of the links between feeding inhibitions and impacts on female reproductive performance. The authors studied the impacts of food deprivation on reproductive endpoints (i.e., fecundity, fertility, molt cycle) during 2 successive molting cycles. Among the main results, the authors found that food deprivation triggered a slowdown of the molting process and a reduction in fertility but no alteration to embryonic development. These reproductive impairments appeared for feeding inhibition values usually recorded in monitoring programs of environmental pollution. Using a population model translating Gammarus life-history, the authors predicted that the observed reproductive alterations predict a strong degradation of population dynamics. The present study underlines the importance of feeding inhibition in population-level risk assessment and discusses how establishing upscaling schemes based on quantitative mechanistic links between impacts at different levels of biological organization can be applied in environmental monitoring to propose an ecotoxicological assessment of water quality, which would be sensitive, specific, and ecologically relevant. Environ Toxicol Chem 2015;34:1031-1038. (c) 2015 SETAC
引用
收藏
页码:1031 / 1038
页数:8
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