Cyanobacteria, cyanotoxins, and their histopathological effects on fish tissues in Fehérvárcsurgó reservoir, Hungary

Damjana Drobac Backović; Nada Tokodi; Zoran Marinović; Jelena Lujić; Tamara Dulić; Snežana B. Simić; Nevena B. Đorđević; Nevena Kitanović; Ilija Šćekić; Béla Urbányi; Jussi Meriluoto; Zorica Svirčev

doi:10.1007/s10661-021-09324-3

Cyanobacteria, cyanotoxins, and their histopathological effects on fish tissues in Fehérvárcsurgó reservoir, Hungary

Damjana Drobac Backović, Nada Tokodi^*, Zoran Marinović, Jelena Lujić, Tamara Dulić, Snežana B. Simić, Nevena B. Đorđević, Nevena Kitanović, Ilija Šćekić, Béla Urbányi, Jussi Meriluoto, Zorica Svirčev

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

18 Citations (Scopus)

Abstract

Cyanobacteria are important members of lake plankton, but they have the ability to form blooms and produce cyanotoxins and thus cause a number of adverse effects. Freshwater ecosystems around the world have been investigated for the distribution of cyanobacteria and their toxins and the effects they have on the ecosystems. Similar research was performed on the Fehérvárcsurgó reservoir in Hungary during 2018. Cyanobacteria were present and blooming, and the highest abundance was recorded in July (2,822,000 cells/mL). The species present were Aphanizomenon flos-aquae, Microcystis flos-aquae, Microcystis wesenbergii, Cuspidothrix issatschenkoi, Dolichospermum flos-aquae, and Snowella litoralis. In July and September, the microcystin encoding gene mcyE and the saxitoxin encoding gene sxtG were amplified in the biomass samples. While a low concentration of microcystin-RR was found in one water sample from July, analyses of Abramis brama and Carassius gibelio caught from the reservoir did not show the presence of the investigated microcystins in the fish tissue. However, several histopathological changes, predominantly in gills and kidneys, were observed in the fish, and the damage was more severe during May and especially July, which coincides with the increase in cyanobacterial biomass during the summer months. Cyanobacteria may thus have adverse effects in this ecosystem.

Original language	English
Article number	554
Journal	Environmental Monitoring and Assessment
Volume	193
Issue number	9
DOIs	https://doi.org/10.1007/s10661-021-09324-3
Publication status	Published - Sept 2021
MoE publication type	A1 Journal article-refereed

Funding

The authors received financial support from the Ministry of Education, Science and Technological Development of the Republic of Serbia (Grant No. 451–03-9/2021–14/200125 and No. 451–03-9/2021–14/200122), Bilateral project Hungary-Serbia Invasive and blooming cyanobacteria in Serbian and Hungarian waters (2017–2019) (TÉT_16-1–2016-0176) and the Erasmus + programme of the European Union (agreement number: 2017–1-FI01-KA107-034440). The Åbo Akademi University Doctoral Scholarship Program supported the work performed by TD. The authors would like to thank Henna Savela for the supervision of molecular analysis. The equipment and facilities for all molecular biology work were provided by the Department of Life Technologies/Biotechnology, University of Turku. The authors would like to express gratitude to ?rp?d Ferincz and ?d?m Staszny for assistance in field sampling.

Keywords

Cyanobacterial blooming
Cyanotoxin encoding genes
Fish histology
Microcystin

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Drobac Backović, D., Tokodi, N., Marinović, Z., Lujić, J., Dulić, T., Simić, S. B., Đorđević, N. B., Kitanović, N., Šćekić, I., Urbányi, B., Meriluoto, J., & Svirčev, Z. (2021). Cyanobacteria, cyanotoxins, and their histopathological effects on fish tissues in Fehérvárcsurgó reservoir, Hungary. Environmental Monitoring and Assessment, 193(9), Article 554. https://doi.org/10.1007/s10661-021-09324-3

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title = "Cyanobacteria, cyanotoxins, and their histopathological effects on fish tissues in Feh{\'e}rv{\'a}rcsurg{\'o} reservoir, Hungary",

abstract = "Cyanobacteria are important members of lake plankton, but they have the ability to form blooms and produce cyanotoxins and thus cause a number of adverse effects. Freshwater ecosystems around the world have been investigated for the distribution of cyanobacteria and their toxins and the effects they have on the ecosystems. Similar research was performed on the Feh{\'e}rv{\'a}rcsurg{\'o} reservoir in Hungary during 2018. Cyanobacteria were present and blooming, and the highest abundance was recorded in July (2,822,000 cells/mL). The species present were Aphanizomenon flos-aquae, Microcystis flos-aquae, Microcystis wesenbergii, Cuspidothrix issatschenkoi, Dolichospermum flos-aquae, and Snowella litoralis. In July and September, the microcystin encoding gene mcyE and the saxitoxin encoding gene sxtG were amplified in the biomass samples. While a low concentration of microcystin-RR was found in one water sample from July, analyses of Abramis brama and Carassius gibelio caught from the reservoir did not show the presence of the investigated microcystins in the fish tissue. However, several histopathological changes, predominantly in gills and kidneys, were observed in the fish, and the damage was more severe during May and especially July, which coincides with the increase in cyanobacterial biomass during the summer months. Cyanobacteria may thus have adverse effects in this ecosystem.",

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Drobac Backović, D, Tokodi, N, Marinović, Z, Lujić, J, Dulić, T, Simić, SB, Đorđević, NB, Kitanović, N, Šćekić, I, Urbányi, B, Meriluoto, J & Svirčev, Z 2021, 'Cyanobacteria, cyanotoxins, and their histopathological effects on fish tissues in Fehérvárcsurgó reservoir, Hungary', Environmental Monitoring and Assessment, vol. 193, no. 9, 554. https://doi.org/10.1007/s10661-021-09324-3

TY - JOUR

T1 - Cyanobacteria, cyanotoxins, and their histopathological effects on fish tissues in Fehérvárcsurgó reservoir, Hungary

AU - Drobac Backović, Damjana

AU - Tokodi, Nada

AU - Marinović, Zoran

AU - Lujić, Jelena

AU - Dulić, Tamara

AU - Simić, Snežana B.

AU - Đorđević, Nevena B.

AU - Kitanović, Nevena

AU - Šćekić, Ilija

AU - Urbányi, Béla

AU - Meriluoto, Jussi

AU - Svirčev, Zorica

PY - 2021/9

Y1 - 2021/9

N2 - Cyanobacteria are important members of lake plankton, but they have the ability to form blooms and produce cyanotoxins and thus cause a number of adverse effects. Freshwater ecosystems around the world have been investigated for the distribution of cyanobacteria and their toxins and the effects they have on the ecosystems. Similar research was performed on the Fehérvárcsurgó reservoir in Hungary during 2018. Cyanobacteria were present and blooming, and the highest abundance was recorded in July (2,822,000 cells/mL). The species present were Aphanizomenon flos-aquae, Microcystis flos-aquae, Microcystis wesenbergii, Cuspidothrix issatschenkoi, Dolichospermum flos-aquae, and Snowella litoralis. In July and September, the microcystin encoding gene mcyE and the saxitoxin encoding gene sxtG were amplified in the biomass samples. While a low concentration of microcystin-RR was found in one water sample from July, analyses of Abramis brama and Carassius gibelio caught from the reservoir did not show the presence of the investigated microcystins in the fish tissue. However, several histopathological changes, predominantly in gills and kidneys, were observed in the fish, and the damage was more severe during May and especially July, which coincides with the increase in cyanobacterial biomass during the summer months. Cyanobacteria may thus have adverse effects in this ecosystem.

AB - Cyanobacteria are important members of lake plankton, but they have the ability to form blooms and produce cyanotoxins and thus cause a number of adverse effects. Freshwater ecosystems around the world have been investigated for the distribution of cyanobacteria and their toxins and the effects they have on the ecosystems. Similar research was performed on the Fehérvárcsurgó reservoir in Hungary during 2018. Cyanobacteria were present and blooming, and the highest abundance was recorded in July (2,822,000 cells/mL). The species present were Aphanizomenon flos-aquae, Microcystis flos-aquae, Microcystis wesenbergii, Cuspidothrix issatschenkoi, Dolichospermum flos-aquae, and Snowella litoralis. In July and September, the microcystin encoding gene mcyE and the saxitoxin encoding gene sxtG were amplified in the biomass samples. While a low concentration of microcystin-RR was found in one water sample from July, analyses of Abramis brama and Carassius gibelio caught from the reservoir did not show the presence of the investigated microcystins in the fish tissue. However, several histopathological changes, predominantly in gills and kidneys, were observed in the fish, and the damage was more severe during May and especially July, which coincides with the increase in cyanobacterial biomass during the summer months. Cyanobacteria may thus have adverse effects in this ecosystem.

KW - Cyanobacterial blooming

KW - Cyanotoxin encoding genes

KW - Fish histology

KW - Microcystin

UR - https://www.scopus.com/pages/publications/85112129191

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DO - 10.1007/s10661-021-09324-3

M3 - Article

C2 - 34357469

AN - SCOPUS:85112129191

SN - 0167-6369

VL - 193

JO - Environmental Monitoring and Assessment

JF - Environmental Monitoring and Assessment

IS - 9

M1 - 554

ER -

Cyanobacteria, cyanotoxins, and their histopathological effects on fish tissues in Fehérvárcsurgó reservoir, Hungary

Abstract

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Keywords

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