Dynamics of potentially pathogenic microflora of the water and pike perch in the Volga Delta

Obukhova, Olga Valentinovna; Lartseva, L. V.; Volodina, V. V.; Vasilyeva, L. M.

doi:10.1134/s1995425517050109

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…There are many papers devoted to the study of sanitary and microbiological indicators (Dolgonosov et al 2006;Sorokovikova et al 2013;Lartseva et al 2015;Obukhova et al 2017) and geochemical characteristics (Lobbes et al 2000;Grishantseva et al 2020;Drozdova et al 2021;Pakusina et al 2022) of lowland rivers in Russia. However, only a few of them investigate the relationship between the abundance and properties of microorganisms, their activity and the chemical composition of water (Judd et al 2006;Tanentzap et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Hydrochemical And Bacterial Properties Of Water Bodies Of The East European Plain During Low Water Period

Tikhonov

Koriytchuk

Yakushev

et al. 2023

GES

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This paper is devoted to the study of the chemical and biological properties of river waters and the relationship between them. We examined the hydrochemical and bacterial properties of surface water in 3 waterbodies: the Mezha River, a pond in Zapovedny village (Central Forest Nature Reserve, Tver Oblast) and the lower reaches of the Don River (Rostov Oblast). The biodiversity of bacteria was determined based on their growth on dissolved organic matter (DOM). Among bacterioplankton capable of growing on DOM as the only source of carbon, the predominant species in the Don River were Pseudomonas and Deinococcus, in the Mezha River – Pseudomonas and Janthinobacterium, in the pond – Arcicella. In terms of sanitary and microbiological indicators, none of the waterbodies complied with the Sanitary Rules and Regulations 1.2.3685-21 for surface waters. The content of most of the studied elements and heterotrophic bacteria in stagnant waterbodies was lower than in flowing streams. The concentration and activity of heterotrophic bacteria in the studied waters correlated positively with the content of biophilic elements in them and negatively with the absence of a current. We showed that there is a strong correlation between bacterial and chemical indicators due to common factors: eutrophication, features of the physical and geographical conditions of the territory, and the presence of a current or animal waste products.

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Section: Introductionmentioning

confidence: 99%

Hydrochemical And Bacterial Properties Of Water Bodies Of The East European Plain During Low Water Period

Tikhonov

Koriytchuk

Yakushev

et al. 2023

GES

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Assessment of the sanitary and microbiological state of the habitating environment of water biological resources in the northern part of the Caspian sea

Baubekova¹,

Kiriukhina²

2023

Fish Breeding and Fisheries

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Both the habitat of aquatic biological resources and almost all ecological and trophic groups of biocenoses are subject to the negative impact of anthropogenic activities in the coastal zone and in the Caspian Sea. Anthropogenic eutrophication caused by domestic and industrial wastewater, fertilizers, disrupts the balance in the structure of biocenoses. Toxic technogenic emissions lead to changes in the state of natural aquatic ecosystems. In order to maintain balance in the face of anthropogenic changes, it is necessary to assess the state of these ecosystems. Оne of the indicators in assessing the quality of the habitat of aquatic biological resources is the sanitary condition of the reservoirs of the Volga-Caspian region. The sanitary and bacteriological state of the northern part of the Caspian Sea was studied as a fishery reservoir and habitat for aquatic biological resources. Based on the results obtained, the degree of pollution of the reservoir and the anthropogenic impact on the studied reservoir. In 2021 seasonal changes in the number of saprotrophic and oligotrophic bacteria in sea water and soil were noted in the waters of the Northern Caspian. In summer, water quality was classified as “clean” water (category 1), while in autumn it deteriorated and was assessed as “polluted” water (category 2). High values of the coli index and the presence of lactose-positive E. coli testified to the presence of household, including fecal, pollution in the coastal zone of the Northern Caspian Sea. At the same time, conditionally pathogenic bacteria (aeromonads, pseudomonads) were not isolated in the studied water samples. The obtained microbiological data indicate a slight anthropogenic impact on the study area.

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Dynamics of potentially pathogenic microflora of the water and pike perch in the Volga Delta

Cited by 2 publications

References 5 publications

Hydrochemical And Bacterial Properties Of Water Bodies Of The East European Plain During Low Water Period

Hydrochemical And Bacterial Properties Of Water Bodies Of The East European Plain During Low Water Period

Assessment of the sanitary and microbiological state of the habitating environment of water biological resources in the northern part of the Caspian sea

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