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Short-term effects of medetomidine on photosynthesis and protein synthesis in periphyton, epipsammon and plankton communities in relation to predicted environmental concentrations

Artikel i vetenskaplig tidskrift
Författare Cecilia Ohlauson
Karl Martin Eriksson
Hans Blanck
Publicerad i Biofouling
Volym 28
Nummer/häfte 5
Sidor 491-499
ISSN 0892-7014
Publiceringsår 2012
Publicerad vid Institutionen för biologi och miljövetenskap
Sidor 491-499
Språk en
Länkar dx.doi.org/10.1080/08927014.2012.68...
Ämnesord medetomidine, antifouling, microbial communities, photosynthesis, bacterial protein synthesis, barnacle balanus-improvisus, marine periphyton, antifouling paint, tolerance pict, candidate, contamination, octopamine, settlement, receptors, coatings
Ämneskategorier Ekologi

Sammanfattning

Medetomidine is a new antifouling substance, highly effective against barnacles. As part of a thorough ecotoxicological evaluation of medetomidine, its short-term effects on algal and bacterial communities were investigated and environmental concentrations were predicted with the MAMPEC model. Photosynthesis and bacterial protein synthesis for three marine communities, viz. periphyton, epipsammon and plankton were used as effect indicators, and compared with the predicted environmental concentrations (PECs). The plankton community showed a significant decrease in photosynthetic activity of 16% at 2 mg l(-1) of medetomidine, which was the only significant effect observed. PECs were estimated for a harbor, shipping lane and marina environment using three different model scenarios (MAMPEC default, Baltic and OECD scenarios). The highest PEC of 57 ng l(-1), generated for a marina with the Baltic scenario, was at least 10,000-fold lower than the concentration that significantly decreased photosynthetic activity. It is concluded that medetomidine does not cause any acute toxic effects on bacterial protein synthesis and only small acute effects on photosynthesis at high concentrations in marine microbial communities. It is also concluded that the hazard from medetomidine on these processes is low since the effect levels are much lower than the highest PEC.

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