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Microhabitat and microtrophic differentiation of ecological niches of green frogs (Ranidae: Pelophylax esculentus complex) in riparian areas of South Banat, Serbia

dc.contributor.advisorStamenković, Srđan
dc.contributor.otherKrizmanić, Imre
dc.contributor.otherVukov, Tanja
dc.contributor.otherPenezić, Aleksandra
dc.contributor.otherStupar, Miloš
dc.creatorBreka, Katarina
dc.date.accessioned2023-09-06T10:58:25Z
dc.date.available2023-09-06T10:58:25Z
dc.date.issued2023-07-05
dc.identifier.urihttps://uvidok.rcub.bg.ac.rs/bitstream/handle/123456789/5328/Referat.pdf
dc.identifier.urihttps://eteze.bg.ac.rs/application/showtheses?thesesId=9225
dc.identifier.urihttps://fedorabg.bg.ac.rs/fedora/get/o:30670/bdef:Content/download
dc.identifier.urihttps://plus.cobiss.net/cobiss/sr/sr/bib/119233545
dc.identifier.urihttps://nardus.mpn.gov.rs/handle/123456789/21546
dc.description.abstractelene žabe iz Pelophylax esculentus kompleksa su akvatične, sintopijske i gregarne žabe širokog rasprostranjenja sa izraženom ulogom u ekosistemima koje naseljavaju. Iako se na teritoriji Srbije i susednih zemalja zelene žabe istražuju u kontinuitetu već više od sto godina, saznanja o njihovoj ekologiji i prostornoj integraciji populacija su malobrojna posebno u delu areala kompleksa gde se javljaju populacioni sistemi sa sva tri taksona u sintopiji. U okviru ove teze urađena je parametrizacija mikrostanišne i mikrotrofičke niše zelenih žaba iz Pelophylax esculentus kompleksa na području Južnog Banata kao i analiza prostorne integracije populacija sa analizom rizika izumiranja. Dodatno, analizirane su epibiontske zajednice kože žaba i kondicioni status sva tri taksona na svakom od lokaliteta. Na kraju, urađena je sintetska reevaluacija lokalnog konzervacionog statusa na istraživanom području. Jedinke su sakupljane na tri lokaliteta u Južnom Banatu koji se razlikuju po svojim hidrološkim, orografskim i stanišnim karakteristikama ali i po stepenu antropogenog uticaja. Jedinke su identifikovane na osnovu standardnih mera za analizu varijabilnosti morfoloških karaktera (6 kvalitativnih i 8 kvantitativnih) uz adekvatnu statističku obradu i validaciju nezavisnom grupom uzoraka identifikovanih genetičkim markerima. Na taj način je od ukupno 317 analiziranih žaba identifikovano 63 jedinki P. ridibundus, 29 jedinki P. lessonae i 225 jedinki P. esculentus pri čemu je konstatovano da se korišćenjem morfoloških karaktera može na brz i ekonommičan način uraditi dovoljno pouzdana identifikacija taksona unutar Pelophylax esculentus kompleksa. Kondicioni status jedinki je procenjen korišćenjem rezidualnog kondicionog indeksa koji predstavlja uobičajenu metodu u batrahologiji. Parentalne vrste su imale bolju telesnu kondiciju u odnosu na hibridni takson a sva tri taksona su generalno lošiju telesnu kondiciju imale na lokalitetu koji je pod najvećim antropogenim pritiskom. Materijal za trofičku analizu je prikupljen neinvazivnom tehnikom ispiranja želuca a obrasci trofije su utvrđeni multivarijantnim statističkim metodama i testirani permutacionim analizama prema različitim scenarijima trofičke diferencijacije. Rezultati su pokazali da zelene žabe istraživanog područja imaju široke, nespecijalizovane trofičke niše čiji se položaj razlikuje u zavisnosti od lokaliteta što ukazuje da je ishrana u većoj meri definisana dostupnošću plena i karakteristikama lokaliteta a manje takson-specifičnim karakteristikama životne forme...sr
dc.description.abstractGreen frogs from the Pelophylax esculentus complex are aquatic, syntopic and gregarious frogs of wide distribution with a distinct role in the ecosystems they inhabit. Although green frogs have been continuously studied on the territory of Serbia and neighbouring countries for more than a hundred years, knowledge about their ecology and spatial integration of populations is scarce, especially in the part of the area of the complex where population systems with all three taxa occur in syntopy. In this work, the parameterisation of the microhabitat and microtrophic niche of green frogs from the Pelophylax esculentus complex in South Banat and the analysis of the spatial integration of populations with the analysis of extinction risk were carried out. In addition, frog skin epibiont communities and body condition of all three taxa at each site were analysed. Finally, a synthetic reassessment of the local conservation status in the studied area was made. Specimens were collected from three sites in southern Banat, differing in their hydrological, orographic and habitat-typical characteristics, but also in the degree of anthropogenic pressure. Individuals were identified using standard measures for the analysis of variability of morphological traits (6 qualitative and 8 quantitative) with appropriate statistical processing and cross-validation by an independent group of samples identified by genetic markers. In this way, out of 317 frogs analysed, 63 individuals of P. ridibundus, 29 individuals of P. lessonae and 225 individuals of P. esculentus were identified and it was concluded that the use of morphological traits allows sufficiently reliable taxon identification within the Pelophylax esculentus complex in a rapid and cost-effective manner. The condition status of the individuals was assessed using the residual condition index, a method frequently used in amphibian research. The parental species had better body condition than the hybrid taxon, and all three taxa generally had lower body condition at the site with the greatest anthropogenic pressure. Material for trophic analysis was collected using the non-invasive stomach-flushing method, and trophic niche patterns were identified using multivariate statistical methods and tested by permutation analyses according to different scenarios of trophic differentiation. The results showed that green frogs in the study area have broad, non-specialised trophic niches whose position varies with location, suggesting that diet is determined to a greater extent by prey availability and site characteristics than by taxon-specific life form characteristics...en
dc.formatapplication/pdf
dc.languagesr
dc.publisherУниверзитет у Београду, Биолошки факултетsr
dc.rightsopenAccessen
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceУниверзитет у Београдуsr
dc.subjectPelophylax esculentus complexsr
dc.subjectPelophylax esculentus complexen
dc.subjectniche differentiationen
dc.subjectdieten
dc.subjecthabitat suitabilityen
dc.subjectPVAen
dc.subjectepibiontic communitiesen
dc.subjectdiferencijacija ekoloških nišasr
dc.subjectishranasr
dc.subjectstanišna povoljnostsr
dc.subjectPVAsr
dc.subjectepibiontske zajednicesr
dc.titleMikrostanišna i mikrotrofička diferencijacija ekoloških niša zelenih žaba (Ranidae: Pelophylax esculentus complex) u riparijalnim područjima Južnog Banata, Srbijasr
dc.title.alternativeMicrohabitat and microtrophic differentiation of ecological niches of green frogs (Ranidae: Pelophylax esculentus complex) in riparian areas of South Banat, Serbiaen
dc.typedoctoralThesis
dc.rights.licenseBY-NC-ND
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/151557/Disertacija_13686.pdf
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/152433/Referat.pdf
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_nardus_21546


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