Show simple item record

The effect of changes of ecological factors on composition and dynamics of phytoplankton cyanobacteria (Cyanobacteria) in small reservoirs

dc.contributor.advisorSimić, Snežana B.
dc.contributor.otherSubakov-Simić, Gordana
dc.contributor.otherOstojić, Aleksandar
dc.contributor.otherPredojević, Dragana
dc.creatorĐorđević, Nevena
dc.date.accessioned2021-10-28T09:39:42Z
dc.date.available2021-10-28T09:39:42Z
dc.date.issued2021-07-19
dc.identifier.urihttp://eteze.kg.ac.rs/application/showtheses?thesesId=8322
dc.identifier.urihttps://fedorakg.kg.ac.rs/fedora/get/o:1395/bdef:Content/download
dc.identifier.urihttps://nardus.mpn.gov.rs/handle/123456789/18686
dc.description.abstractPredmet istraživanja ove doktorske disertacije su fitoplanktonske cijanobakterije (Cyanobacteria) u malim akumulacijama i uticaji ekoloških faktora na prisustvo i dominaciju različitih vrsta, sa posebnim aspektom na potencijalno invazivne i toksične cijanobakterije. Trogodišnji monitoring je sproveden jednom mesečno na tri akumulacije (akumulacija Šumarice, akumulacija Bubanj i Aleksandrovačka akumulacija). Primenom metode samoorganizujućih mapa (SOM) omogućena je klasifikacija uzoraka na osnovu fizičkih i hemijskih parametara, kao i vizualizacija prostorne distribucije biotičkih parametara. Tri pomenuta vodna tela značajno se razlikuju po opštim karakteristikama, hemijskom sastavu vode i dinamici fitoplanktonskih cijanobakterija. Različitost ispitivanih akumulacija se ogleda u malom broju zajedničkih taksona i u taksonima koji su bili najfrekventniji i cvetajući: akumulacija Šumarice (Aphanizomenon flos-aquae), akumulacija Bubanj (Microcystis aeruginosa) i Aleksandrovačka akumulacija (Raphidiopsis raciborskii). Najznačajniji sredinski parametri koji utiču na zajednicu cijanobakterija su koncentracije ukupnog fosfora i azota. Naša studija pokazuje da ekstremne padavine mogu da dovedu do povećanja koncentracije hranljivih materija u rezervoarima, i uzrokuju značajan ekološki poremećaj zajednice (cvetanje potencijalno toksičnih cijanobakterija). Pojava i dominacija invazivne vrste R. raciborskii u Aleksandrovačkoj akumulaciji pokazuje da ova vrsta širi svoj areal rasprostranjenja. Prilikom sprovedenog istraživanja u okviru ove disertacije u Srbiji prvi put je detektovan toksin cilindrospermopsin (CYN). Ova studija je pokazala da je ekstrakt vrste R. raciborskii ispoljio genotoksičnost čak i u niskim koncentracijama i povećao oksidativni stres u jetri pacova nakon jednog izlaganja.sr
dc.description.abstractThe research subject of this doctoral dissertation includes phytoplankton cyanobacteria (Cyanobacteria) in the small reservoirs and the effects of ecological factors on the presence and dominance of different species, with particular aspects on invasive and potentially toxic cyanobacteria. Three-year monitoring was conducted (monthly) on three reservoirs (Šumarice reservoir, Bubanj reservoir, and Aleksandrovac reservoir). The method of self-organizing map (SOM) provided the efficient classification of samples, based on physical and chemical parameters, as well as the visualization of the spatial distribution of biotic parameters. These three water bodies are significantly different according to their general characteristics, chemical water composition, and cyanobacteria dynamics. The dissimilarity of the examined reservoirs is reflected in the small number of common taxa and in the taxa that were the most frequent and blooming: Šumarice reservoir (Aphanizomenon flos-aquae), Bubanj reservoir (Microcystis aeruginosa) and Aleksandrovac reservoir (Raphidiopsis raciborskii). Тhe most important environmental parameters affecting the cyanobacteria community are concentrations of total phosphorus and nitrogen. Our study shows that extreme precipitations can cause an increase in nutrient concentration in reservoirs and significant environmental disturbance to the community (blooming of potentially toxic cyanobacteria). The domination of invasive species R. raciborskii in Aleksandrovac reservoir indicates that this species is expanding its areal distribution. The research conducted in this dissertation has detected the toxin cilindrospermopsin (CYN) for the first time in Serbia. This study shows that the extract of R. raciborskii exhibited genotoxicity even at low concentrations and increased oxidative stress in rat liver after a single exposure.en
dc.formatapplication/pdf
dc.languagesr
dc.publisherУниверзитет у Крагујевцу, Природно-математички факултетsr
dc.relationinfo:eu-repo/grantAgreement/EC/FP7/603629/EU//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/31011/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/41010/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/43002/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/43004/RS//
dc.rightsopenAccessen
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/4.0/
dc.sourceУниверзитет у Крагујевцуsr
dc.subjectfitoplanktonske cijanobakterije, Cyanobacteria, cijanotoksini, invazivne vrste, ekološki faktori, male akumulacijesr
dc.subjectphytoplankton cyanobacteria, Cyanobacteria, cyanotoxins, invasive species, ecological factors, small accumulationsen
dc.titleUticaj promena ekoloških faktora na sastav i dinamiku fitoplanktonskih cijanobakterija (Cyanobacteria) u malim akumulacijamasr
dc.title.alternativeThe effect of changes of ecological factors on composition and dynamics of phytoplankton cyanobacteria (Cyanobacteria) in small reservoirsen
dc.typedoctoralThesis
dc.rights.licenseBY-NC-SA
dcterms.abstractСимић, Снежана Б.; Субаков-Симић, Гордана; Предојевић, Драгана; Остојић, Aлександар; Ђорђевић, Невена;
dc.identifier.fulltexthttps://nardus.mpn.gov.rs/bitstream/id/77177/Doctoral_thesis_11572.pdf
dc.identifier.fulltexthttps://nardus.mpn.gov.rs/bitstream/id/77178/Nevena_Djordjevic_PMF.pdf
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_nardus_18686


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record