Title Akumulacija elemenata u tragovima u morskim cvjetnicama u hrvatskom dijelu Jadrana Title (english) Trace element accumulation in seagrasses from the Croatian part of the Adriatic Sea Author Jelena Lušić Mentor Nevenka Mikac (mentor)Committee member Ivana Ujević (predsjednik povjerenstva)Committee member Grozdan Kušpilić (član povjerenstva)Committee member Zoran Grubač (član povjerenstva)Granter University of Split Defense date and country 2016-12-16, Croatia Scientific / art field, NATURAL SCIENCES Universal decimal classificationUDC ) 57 - Biological sciences. Physical anthropology. Biodiversity Abstract U radu je istražena raspodjela elemenata u tragovima (Al, As, Ba, Bi, Cd, Co, Cr, Cs, Cu, Fe, Li, Ni, Mn, Mo, Pb, Rb, Sb, Sn, Sr, Ti, Tl, U, V i Zn), glavnih elemenata (K i Mg), i elemenata rijetkih zemalja (La, Ce, Pr, Nc, Sm, Eu, Gd, Tb, Dy, Ho, ER, Tm, Yb, Lu i Y) u morskim cvjetnicama (Posidonia oceanica (Linnaeus) Delile, Cymodocea nodosa (Ucria) Ascherson i Zostera noltei Hornemann) u hrvatskom dijelu Jadrana. Istovremeno, određen je sadržaj navedenih elemenata u sedimentu, kao i
... More koncentracije Cu, Zn, Cd, Pb, Co i Ni u pridnenom vodenom sloju istraženih područja. Metodom sekvencijalne ekstrakcije procijenjen je udio elemenata u sedimentu raspoloživ za unos u cvjetnice. Utvrđeno je da je sadržaj elemenata Cd, Co, Cu, Ni, Pb i Zn u cvjetnicama nekoliko puta viši od sadržaja navedenih elemenata u vodenom stupcu, što upućuje na dobra bioakumulacijska svojstva cvjetnica. Povišene vrijednosti masenih udjela As, Cd, Co, Cu, K, Mo, Ni, Sb, Rb, U i Zn u korijenju vrste P. oceanica, u odnosu na njihove masene udjele u sedimentu, potvrđuju dobar kapacitet bioakumulacije navedenih elemenata u tkivu cvjetnice. Korelacije između sadržaja Al, Ba, Bi, Co, Cr, Cs, Cu, Fe, Li, Mn, Tl, Zn i ERZ u korijenju i sedimentu, te korelacije između sadržaja Al, Bi, Cr, Cs, Fe, Ni i Ti u rizomima cvjetnice i njihovog sadržaja u sedimentu, upućuju na mogućnost primjene vrste P. oceanica kao biološkog pokazatelja stanja sedimenta u odnosu na sadržaj navedenih elemenata. Ustanovljene razlike u raspodjeli akumuliranih elemenata u tragovima u pojedinim organima cvjetnica upućuju na različite mehanizme unosa elemenata u organizam biljke. Ovo istraživanje pruža prve opsežne podatke o sadržaju i raspodjeli elemenata u cvjetnicama u obalnom području istočnog Jadrana. Dobivena saznanja o mogućnosti primjene morskih cvjetnica kao bioindikatora onečišćenja elementima u tragovima od posebne su važnosti za priobalna područja u kojima drugi, sesilni, bioindikatorski organizmi, npr. dagnje, nisu dostupni. Less Abstract (english) Distribution of trace elements (Al, As, Ba, Bi, Cd, Co, Cr, Cs, Cu, Fe, Li, Ni, Mn, Mo, Pb, Rb, Sb, Sn, Sr, Ti, Tl, U, V, and Zn), major elements (K and Mg), and rare earth elements (La, Ce, Pr, Nc, Sm, Eu, Gd, Tb, Dy, Ho, ER, Tm, Yb, Lu, and Y) was investigated in three different seagrass species (Posidonia oceanica (Linnaeus) Delile, Cymodocea nodosa (Ucria) Ascherson, and Zostera noltei Hornemann) in the area of the Croatian Adriatic coast. In parallel with measurements of trace
... More element content in seagrasses, analyses of trace element levels in sediment and near–bottom layer of seawater were carried out. Sequential extraction method was used to evaluate the bioavailable fraction of elements in sediments. The levels of Cd, Co, Cu, Ni, Pb and Zn in seagrasses were found to be several orders of magnitude higher compared to the levels in the surrounding water column which points to a high metal bioaccumulative capacity of seagrasses. Significant positive correlations between the levels of Al, Ba, Bi, Co, Cr, Cs, Cu, Fe, Li, Mn, Tl, Zn and ERZ in seagrass roots and sediment, as well as positive correlations between the levels of Al, Bi, Cr, Cs, Fe, Ni and Ti in rhizomes and sediment, indicate that P. oceanica may be used as a bioindicator of trace elements in sediment. The obtained results provide novel information on the level and distribution of a broad set of elements in the marine seagrasses growing in the coastal area of the eastern Adriatic. Moreover, the study will provide valuable insight on bioindicator properties of seagrasses. The obtained information on the potential use of marine seagrasses as bioindicators of pollution is important for coastal areas where other, sessile bioindicator species, e.g. mussels, are not available. Less Keywords
bioakumulacija
bioindikatori
biodostupnost elemenata u sedimentu
elementi u tragovima
morske cvjetnice
raspodjela u biljnim organima
sekvencijalna ekstrakcija
Keywords (english)
bioaccumulation
bioindicators
bioavialiability of elements in sediment
marine seagrasses
sequential extraction
trace elements
trace element distribution in plant organs
Language croatian URN:NBN urn:nbn:hr:226:174900 Study programme Title: Applied Marine Sciences Type of resource Text Extent VIII, 328 str. ; 30 cm File origin Born digital Access conditions Open access Terms of use Created on 2018-05-14 06:43:41
