algal blooms; anatoxin; bioindication; Cuspidothrix; cyanobacteria; cyanoprokaryotes; drone; Eustigmatophyceae; green algae; HPLC; microcystin; Microcystis; Ecology; Ecological Modeling; Agricultural and Biological Sciences (miscellaneous); Nature and Landscape Conservation
Abstract :
[en] The general awareness of the threats on biodiversity and water quality raised the number of studies that use phytoplankton in assessment procedures. Since most metrics require obtaining mean values, this paper presents data that may help speed up field work and find indicators for a rapid water quality assessment based on single samplings, allowing simultaneous work on many sites. The phytoplankton from 43 Bulgarian waterbodies collected during three summer campaigns (2018, 2019, 2021) at sites selected after drone observations was studied by conventional light microscopy (LM) and an HPLC analysis of marker pigments. Our results allowed us to recommend drones and the HPLC application as reliable methods in rapid water quality assessments. In total, 787 algae from seven phyla (53 alien, new for Bulgaria) were identified. Chlorophyta was the taxonomically richest group, but Cyanoprokaryota dominated the biomass in most sites. New PCR data obtained on anatoxin and microcystin producers confirmed the genetic diversity of Cuspidothrix and Microcystis and provided three new species for the country’s toxic species, first identified by LM. A statistical analysis revealed significant correlations of certain algal phyla and classes with different environmental variables, and their species are considered promising for future search of bioindicators. This is especially valid for the class Eustigmatophyceae, which, as of yet, has been almost neglected in water assessment procedures and indices.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Stoyneva-Gärtner, Maya P. ; Department of Botany, Faculty of Biology, Sofia University, Sofia, Bulgaria
Descy, Jean-Pierre ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Chemical Oceanography Unit (COU)
Uzunov, Blagoy A. ; Department of Botany, Faculty of Biology, Sofia University, Sofia, Bulgaria
Miladinov, Peter; Department of Library and Information Studies, Faculty of Philosophy, Sofia University, Sofia, Bulgaria
Stefanova, Katerina ; AgroBioInstitute, Bulgarian Agricultural Academy, Sofia, Bulgaria
Radkova, Mariana; AgroBioInstitute, Bulgarian Agricultural Academy, Sofia, Bulgaria
Gärtner, Georg; Institut für Botanik, Universität Innsbruck, Innsbruck, Austria
Language :
English
Title :
Diversity of the Summer Phytoplankton of 43 Waterbodies in Bulgaria and Its Potential for Water Quality Assessment
This research was funded by the SCIENTIFIC RESEARCH FUND of the Bulgarian Ministry of Education through projects with the following grant numbers DN-13/9—15.12.2017, KP-06-OPR03/18—19.12.2018, and KP-06-OPR06/2—18.12.2018. Sampling in 2018 and 2021 was financed by the project DN-13/9—15.12.2017, whereas the sampling in 2019 was financed by KP-06-OPR03/18—19.12.2018 for 16 sites, and by KP-06-OPR06/2—18.12.2018 for 11 sites.
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