Abstract
Caffeine is considered the most widely consumed pharmacologically active drug. It is probably found in popular beverages (coffee, tea, soft drinks), as well as cocoa or chocolates-based goods. However, it has received a lot of attention there is still much to be learned with respect to its toxicology in animals. Terrestrial isopods are considered one of the most investigated invertebrate groups in soil ecotoxicology. The aim of this study was to evaluate the effect of different concentrations of coffee on feeding parameters and the growth of terrestrial isopod Porcellio laevis. Feeding parameters and growth efficiency were calculated and compared among treated isopod groups. The results revealed decreasing in food parameters such as consumption ratio, assimilation ratio, and egestion ratio in P. laevis treated with different concentrations of coffee. Also, decreasing growth efficiency for this isopod was noticed after exposure to different concentrations of coffee. These results indicate that high levels of caffeine may have toxic effects on P. laevis after a long period of exposure. Further research about the toxic effect of caffeine on isopods is needed.
Highlights
Terrestrial isopods play an important role in the decomposition of leaf litter and so are making a significant contribution to nutrient cycling and soil ecosystem services
The present study aimed to evaluate the effect of coffee on feeding parameters and the growth of terrestrial isopod Porcellio laevis
Effects of Coffee on Feeding Inhibition in Different Treatments: The experimental procedure for the determination of the means and standard errors of the feeding parameters for treated groups P. laevis was shown in table (1)
Summary
Terrestrial isopods play an important role in the decomposition of leaf litter and so are making a significant contribution to nutrient cycling and soil ecosystem services. They are considered one of the most investigated invertebrate groups in soil ecotoxicology, both in laboratory toxicity tests and in-field monitoring and bioindication studies. PPCPs are released into the environment through sewage treatment and their persistence in the environment has impacted flora, animals, and human being worldwide
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