Title Mikrobiološka i sanitarna kvaliteta mora u Limskom zaljevu Title (english) Microbiological and sanitary quality of the sea in the Lim bay Author Nataly Milovan Mentor Paolo Paliaga (mentor)Committee member Emina Pustijanac (predsjednik povjerenstva)Committee member Paolo Paliaga (član povjerenstva)Committee member Neven Iveša (član povjerenstva)Granter University of Pula Defense date and country 2022-09-12, Croatia Scientific / art field, NATURAL SCIENCES Abstract Područja estuarija od velikog su ekološkog, estetskog, ekonomskog i kulturološkog značaja te kao takvi spadaju među najproduktivnije i najdinamičnije ekosustave na Zemlji. Zbog specifičnih uvjeta kao što su miješanja vodenih masa različitog saliniteta i obilja hranjivih tvari prisutnih na tom području, estuariji se smatraju vrlo važnim staništima za mnoge vrste kopnenih i vodenih organizama što ih čini staništima s izrazito visokom biološkom raznolikošću. Primjer takvog područja nalazi se na zapadnoj obali Istre, poznato pod nazivom Limski zaljev. Unutrašnje područje Limskog zaljeva pod jakim je utjecajem vrulja što ga čini izrazito biološki produktivnim područjem. U ovom istraživanju pratili su se hidrografski parametri – temperatura, salinitet, pH vrijednost i saturacija kisikom i mikrobiološki pokazatelji poput brojnosti morske mikrobne zajednice, te je provedena sanitarna kontrola mora kroz četiri godišnja doba. Postavljena hipoteza o značajnom utjecaju vrulja na hidrografske parametre i brojnost mikrobne zajednice u površinskom dijelu zaljeva, te hipoteza da obalne vrulje u Limskom zaljevu predstavljaju potencijalni izvor fekalnih bakterija potvrđene su dobivenim rezultatima. Temeljem provedenog istraživanja može se zaključiti da u obalnom dijelu Limskog zaljeva dotok slatkih i hladnih voda putem vrulja dovodi do promjena hidrografskih uvjeta čime nastaju specifični uvjeti ekosustava koji su pogodni heterotrofnoj komponenti mikrobne zajednice. Uz to, povremena prisutnost većih koncentracija fekalnih indikatora u slatkoj vodi iz vrulja negativno utječe na sanitarnu kvalitetu mora u zaljevu. Potrebno je provoditi redovne sanitarne kontrole mora i precizno identificirati i sanirati izvore fekalnog onečišćenja u svrhu očuvanja od antorpogenog onečišćenja ovog posebnog rezervata u moru.
Abstract (english) Estuary areas are of great ecological, aesthetic, economic and cultural importance and as such are among the most productive and dynamic ecosystems on Earth. Due to specific conditions such as the mixing of water masses of different salinity and the abundance of nutrients present in the area, estuaries are considered very important habitats for many types of terrestrial and aquatic organisms, which makes them habitats with an extremely high biological diversity. An example of such an area is located on the west coast of Istria, known as the Lim Bay. The inner area of the Lim Bay is strongly influenced by underwater freshwater springs, which makes it an extremely biologically productive area. In this research, hydrographic parameters were monitored - temperature, salinity, pH value and oxygen saturation, and microbiological indicators such as the abundance of the marine microbial community, and sanitary control of the sea was carried out through four seasons. The hypothesis about the significant influence of underwater freshwater springs on hydrographic parameters and the abundance of the microbial community in the surface part of the bay, and the hypothesis that coastal underwater freshwater springs in the Lim Bay represent a potential source of fecal bacteria, were confirmed by the obtained results. Based on the conducted research, it can be concluded that in the coastal part of the Lim Bay, the inflow of fresh and cold water through underwater freshwater springs leads to changes in hydrographic conditions, which creates specific ecosystem conditions that are suitable for the heterotrophic component of the microbial community. In addition, the occasional presence of higher concentrations of fecal indicators in fresh water from underwater freshwater springs negatively affects the sanitary quality of the sea in the bay. It is necessary to carry out regular sanitary controls of the sea and precisely identify and remediate the sources of fecal pollution in order to protect this special reserve in the sea from anthropogenic pollution.
Keywords
biologija mora
Limski zaljev
sanitarna kontrola
morska mikrobna zajednica
Keywords (english)
Marine biology
Lim bay
Sanitary control
Marine microbial community
Language croatian URN:NBN urn:nbn:hr:137:952883 Study programme Title: University Undergraduate Study Programme - Marine Sciences Type of resource Text File origin Born digital Access conditions Open access Terms of use Created on 2022-09-15 11:30:55
