Kemotaksonomska i morfološka analiza fitoplanktona u trofičkom gradijentu sjevernog Tihog oceana

master's thesis

• Title (english): Chemotaxonomic and morphological approach to phytoplankton analyses in contrasting trophic systems of North Pacific
• Author: Hrvoje Višić
• Mentor: Zrinka Ljubešić (mentor)
• Committee member: Zrinka Ljubešić (član povjerenstva)
• Committee member: Petar Kružić (član povjerenstva)
• Committee member: Mladen Juračić (član povjerenstva)
• Committee member: Danijel Orešić (član povjerenstva)
• Committee member: Vlasta Ćosović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2018-02-08, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

U sklopu Schmidt Ocean Institute ekspedicije Sea to Space Particle Investigation na sjevernom Tihom oceanu sakupljeni su uzorci za analizu fitoplanktona i pigmenta. Cilj ovog rada je detaljna kvantitativna, kvalitativna i kemotaksonomska analiza fitoplanktonske zajednice sjevernog Tihog oceana u svrhu određivanja stupnja trofije tog područja. Pojedine fitoplanktonske skupine mogu biti identificirane po svojim jedinstvenim optičkim svojstvima koje proizlaze iz strukturne građe samih stanica ili fluorescencije pigmenata koje proizvode. Na tome se bazira program PACE (eng. Plankton, Aerosol, Cloud, ocean Ecosystem) američke Nacionalne aeronautičke i svemirske administracije (NASA) za koju je napravljena analiza fitoplanktona i pigmenata. Fitoplanktonska zajednica sjevernog Tihog oceana uglavnom se sastojala od kokolitoforida (35,5%), dijatomeja (25,2%) i dinoflagelata (19,5%), dok su kriptofiti, zeleni bičaši, silikoflagelati i ostali doprinijeli fitoplanktonskoj zajednici s 19,8%. Kokolitoforidi dominiraju u nanofitoplanktonskoj frakciji na svim postajama, dok dijatomeje dominiraju u zajednici mikrofitoplanktona. Na osnovi taksonomskog sastava fitoplanktona, određenog morfološki i kemotaksonomski, istraživano je područje podijeljeno na četiri različita trofička sustava. Zabilježeno je ukupno 106 taksona dijatomeja, 48 kokolitoforida i 41 dinoflagelat, dok je 12 taksona pripadalo ostalim skupinama. Rezultati ovog istraživanja koristiti će se u svrhu razvijanja algoritama i kalibracije senzorske tehnologije orbitalnih satelita pomoću kojih će bit moguće promatrati suptilne razlike u boji oceana.

Abstract (english)

Sea to Space Particle Investigation Expedition (funded by Schmidt Ocean Institute) was conducted in the North Pacific Ocean, and samples were collected for phytoplankton and pigment analysis. The research aim of this study is to give detailed quantitative, qualitative and chemotaxonomic analysis of the phytoplankton community in the North Pacific to determine the trophic state of this area. Certain phytoplankton groups can be identified by their unique optical properties resulting from the structure of the cells themselves or the fluorescence of the pigments they produce. PACE (Plankton, Aerosol, Cloud, Ocean Ecosystem) program of the US National Aeronautics and Space Administration (NASA) is based on this premise for which these phytoplankton and pigment analyses have been made. The phytoplankton community of the North Pacific Ocean is mainly comprised of coccolithophores (35.5%), diatoms (25.2%) and dinoflagellate (19.5%), while cryptophytes, phytoflagellates, silicoflagellates and others contributed with 19.8%. Coccolithophorids dominate nanophytoplankton fraction at all stations, while diatoms dominate the microphytoplankton community. Based on the composition of phytoplankton and pigment concentrations, the investigated area was divided into four different trophic systems. A total of 106 taxa of diatoms, 48 coccolithophores, and 41 dinoflagellates have been recorded, while 12 taxa belonged to the other groups. The results of this research will be used to develop algorithms and calibration of sensor technology of orbital satellites by which it will be possible to observe the subtle color differences of the ocean.

• Keywords: pigmenti; eutrofikacija; brojnost čestica; boja oceana; NASA PACE
• Keywords (english): pigments; eutrophication; particle abundance; ocean color; NASA PACE
• Language: croatian
• URN:NBN: urn:nbn:hr:217:223938
• Study programme: Title: Enviromental Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra struke znanosti o okolišu (magistar/magistra struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2018-05-03 07:34:27