Toxicity Screening of Surface Waters in Zaghen Restoration Area with Toxkit Microbiotests

Author:

Suliman Iasemin12ORCID,Tudor Iuliana-Mihaela1ORCID,Ibram Orhan1ORCID

Affiliation:

1. Danube Delta National Institute for Research and Development, Department of Laboratories and Research Stations , Babadag Street 165 , Tulcea , România

2. Ovidius University of Constanţa, Doctoral School of Applied Sciences , Ion Vodă Street 58 , Constanţa , România

Abstract

Abstract In this study, we report the findings regarding the toxicity of surface waters collected in March 2023 from five sampling stations in the Zaghen restoration area, located within the Danube Delta Biosphere Reserve, Romania. The assessment of acute toxicity was conducted using two microbiotests: the Thamnotoxkit F and the Daphtoxkit FTM magna. Even if the acute toxicity effects are less than 50% and do not allow the calculation of a toxicity score for the water samples, the experiments show a different vulnerability of the two zooplanktonic species to the presence of heavy metals in the water with mortality being higher in Thamnocephalus platyurus (20%) than in Daphnia magna (15%).

Publisher

Walter de Gruyter GmbH

Reference18 articles.

1. Bouthir F. Z., Afandi I., Talba S., Labonne M., Masski H., Waeles M. and Lae R., 2023 – First survey of metallic distribution in zooplankton from a south Moroccan area, Oceanologia, ISSN 0078-3234, DOI: 10.1016/j.oceano.2023.06.009.

2. Dimitriu M., Scrieciu M. A. and Oprea I. A. 2010 – The ecological reconstruction of the Zaghen Tulcea wetland and its evaluation, Global Journal of Researches in Engineering, 10, 5, 14-20.

3. Dumitrescu V. and Cârșmariu A., 2014 – The Lower Danube green corridor. Contributions to the analysis of the restoration opportunities for certain surveyed wetlands in the Danube floodplain, diversified by types of potential, 2nd International Conference Water Resources and Wetlands, 11-13 September, Tulcea, Romania.

4. ISO 6341, 2012 – Water quality-determination of the inhibition of the mobility of Daphnia magna straus (Cladocera, Crustacea) – Acute Toxicity Test. ISO: Geneva, Switzerland, available online: https://www.iso.org/standard/54614.html (accessed on 17 July 2023).

5. ISO 14380, 2011 – Water quality – determination of the acute toxicity to Thamnocephalus platyurus (Crustacea, Anostraca). ISO: Geneva, Switzerland, available online: https://www.iso.org/standard/54613.html (accessed on 17 July 2023).

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