Title Eutrofni uvjeti u uzgajalištu Budava u 2017. Title (english) Eutrophic conditions in fish farm Budava in 2017. Author Leana Zandona Mentor Tamara Đakovac (mentor)Committee member Ljiljana Iveša (predsjednik povjerenstva)Committee member Tamara Đakovac (član povjerenstva)Committee member Željko Jakšić (član povjerenstva)Granter University of Pula Defense date and country 2019-09-27, Croatia Scientific / art field, NATURAL SCIENCES Abstract Hranjive soli su otopljeni anorganski spojevi dušika (amonijeve soli, nitriti i nitrati), fosfora (ortofosfati) i silicija (ortosilikati) otopljeni u morskoj vodi koji imaju važnu ulogu u primarnoj proizvodnji i koji se nakon uginuća organizama, sedimentacije i heterotrofne razgradnje remineraliziraju te vraćaju u vodeni stupac. Eutrofikacija je proces obogaćivanja vodenog staništa hranjivim solima koji dovodi do porasta fitoplanktonske biomase, te do povećanog protoka partikularne organske tvari prema dnu. Cilj rada bio je utvrditi eutrofne uvjete u uvali Budava 2017. godine analizom primjerenih parametara u vodenom stupcu i površinskom sedimentu na postajama u neposrednoj blizini kaveza za uzgoj ribe i na postaji koja nije pod direktnim utjecajem uzgajališta te ih međusobno usporediti. Rezultati su pokazali da uzgoj riba može značajno utjecati na eutrofne uvjete povišenjem koncentracija hranjivih soli uvale Budava, iako je to pretežito bilo ograničeno na područje oko kaveza. U prosincu 2017. godine to se nije značajno odrazilo na trofički status, tj. najviše vrijednosti indikatora eutrofikacije u vodenom stupcu (ortofosfata i ukupnog anorganskog dušika) kretale su se u rasponu koji opisuje oligotrofno stanje. No, potrebno je istaknuti da je za razliku od zimske sezone, tijekom proljeća i ljeti uobičajeno raslojavanje vodenog stupca znatno izraženo, te može doći do povećanog stvaranja organske tvari u procesima intenzivne primarne proizvodnje zbog čega su nužna dodatna istraživanja u tim kritičnim sezonama.
Rad je pohranjen u knjižnicama Sveučilišta Jurja Dobrile u Puli i Instituta „Ruđer Bošković“ u Rovinju.
Abstract (english) Nutrients are dissolved inorganic compounds of nitrogen (ammonium, nitrites and nitrates), phosphorus (orthophosphates) and silicon (orthosilicates) dissolved in seawater that play an important role in primary production and which, after the death of organisms, sedimentation and heterotrophic degradation, are remineralized and returned into the water column. Eutrophication is the process of enriching the aquatic habitat with nutrients that leads to an increase in phytoplankton biomass and an increased flow of particulate organic matter towards the bottom. The aim of the study was to determine eutrophic conditions in Budava Bay in 2017 by analyzing adequate parameters in the water column and surface sediment, at stations close to the fish cages and at the station not directly influenced by the farms and to compare them. The results showed that fish farming can significantly affect eutrophic conditions by increasing the nutrient concentrations of Budava Bay, although this was predominantly restricted to the area around the cage. In December 2017, this did not significantly affect the trophic status, i.e. the highest values of the eutrophication indicators in the water column (orthophosphate and total inorganic nitrogen) were in the range describing the oligotrophic state. However, it should be noted that, unlike the winter season, during the spring and summer, the usual stratification of the water column is significantly pronounced, which may lead to increased organic matter formation in intensive primary production processes, and additional research is required in these critical seasons.
Keywords
mehanizmi dugoročnih promjena u ekosustavu mora
hranjive soli
trofički status
sediment
redoks potencijal
uzgajalište
uvala Budava
Keywords (english)
nutrients
trophic status
sediment
redox potential
fish farm
Budava bay
Language croatian URN:NBN urn:nbn:hr:137:270484 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 2019-11-07 13:36:22
