NDLI: Effect of water quality and confounding factors on digestive enzyme activities in Gammarus fossarum

Content Provider	Springer Nature Link
Author	Charron, L. Geffard, O. Chaumot, A. Coulaud, R. Queau, H. Geffard, A. Dedourge Geffard, O.
Copyright Year	2013
Abstract	The feeding activity and subsequent assimilation of the products resulting from food digestion allow organisms to obtain energy for growth, maintenance and reproduction. Among these biological parameters, we studied digestive enzymes (amylase, cellulase and trypsin) in Gammarus fossarum to assess the impact of contaminants on their access to energy resources. However, to enable objective assessment of a toxic effect of decreased water quality on an organisms’ digestive capacity, it is necessary to establish reference values based on its natural variability as a function of changing biotic and abiotic factors. To limit the confounding influence of biotic factors, a caging approach with calibrated male organisms from the same population was used. This study applied an in situ deployment at 23 sites of the Rhone basin rivers, complemented by a laboratory experiment assessing the influence of two abiotic factors (temperature and conductivity). The results showed a small effect of conductivity on cellulase activity and a significant effect of temperature on digestive enzyme activity but only at the lowest temperature (7 °C). The experimental conditions allowed us to define an environmental reference value for digestive enzyme activities to select sites where the quality of the water impacted the digestive capacity of the organisms. In addition to the feeding rate, this study showed the relevance of digestive enzymes as biomarkers to be used as an early warning tool to reflect organisms’ health and the chemical quality of aquatic ecosystems.
Starting Page	9044
Ending Page	9056
Page Count	13
File Format	PDF
ISSN	09441344
Journal	Environmental Science and Pollution Research
Volume Number	20
Issue Number	12
e-ISSN	16147499
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-06-21
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biomarkers Invertebrate Caging Amylase Cellulase Trypsin Temperature Conductivity Environment Environmental Chemistry Ecotoxicology Environmental Health Atmospheric Protection/Air Quality Control/Air Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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