Taksonomija i distribucija recentnih bentičkih foraminifera na sjevernojadranskom šelfu (jezgra F53)

master's thesis

• Title (english): Taxonomy and distribution of recent benthic foraminifera on the north Adriatic shelf (core FS3)
• Author: Marina Janjetić
• Mentor: Vlasta Ćosović (mentor)
• Committee member: Vlasta Ćosović (predsjednik povjerenstva)
• Committee member: Đurđica Pezelj (član povjerenstva)
• Committee member: Nenad Tomašić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2017-06-06, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology; Geology and Paleontology

Abstract

Sedimentnoj jezgri izvađenoj na području Piranskog zaljeva (N 45°32'55,68"; E 13°33'1,59", dubina 44m) istražena je foraminiferska zajednica. Uzorci odgovaraju dubini sedimenta 10 – 25cm podijeljenih u 6 pod-uzoraka. Za mikropaleontološku analizu korišten je FOBIMO standard prema Schönfeld (2012), a za određivanje rodova i vrsta bentičkih foraminifera klasifikacija prema Loeblich & Tappan (1988). Uzorcima su određeni statistički indeksi, indeksi bioraznolikosti, Jaccardov indeks s obzirom na referalni sloj 0 – 2cm, foraminiferski stres indeks te salinitet primjenom metode transfera funkcija, a abundantne vrste i rodovi su opisani. Uzorcima su dominirale epifaunalne vrste te predstavnici podreda Rotaliina, posebice rodovi Elphidium, Ammonia i Asterigerinata. Rezultati analiza pokazali su da se radi o oligotrofičnom okolišu normalnog saliniteta i neznatnog zagađenja. Indeksi bioraznolikosti pokazali su da su zajednice raznolike i ujednačene bez preferiranog trenda povećanja ili smanjenja nekog od indeksa s obzirom na starost uzoraka.

Abstract (english)

The sediment core taken in the Gulf of Piran (N 45°32'55,68"; E 13°33'1,59", 44m depth) was the subject of foraminiferal assemblages research. Samples used correspond to sediment at the depth of 10 – 25cm, divided into 6 sub-samples. Micropaleontological analysis was done following the FOBIMO standard by Schönfeld (2012) while the benthic foraminifera species and genera have been identified following Loeblich & Tappan (1988) criteria. A variety of statistical and biodiversity indices have been calculated, aswell as the Jaccard index in comparison to the referral layer (0 – 2cm), the foraminifera stress index and salinity using the transfer function method, while several abundant species and genera have been described. Samples were dominated by epifaunal species and taxa belonging to Rotaliina suborder, especially Elphidium, Ammonia and Asterigerinata genera. The analysis indicates that the environments are oligotrophic with normal salinity and slightly polluted. Biodiversity indices have shown that the assemblages are diverse and even while showing no trend of their decrease or increase in relation to the age.

• Keywords: bentičke foraminifere; indeksi bioraznolikosti; Jadransko more; salinitet
• Keywords (english): Adriatic sea; benthic foraminifera; biodiversity indices; salinity
• Language: croatian
• URN:NBN: urn:nbn:hr:217:819673
• Study programme: Title: Graduate university study of Geology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra geologije (magistar/magistra geologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-06-07 07:29:34