Alge kremenjašice kao biološki pokazatelji ekološkog stanja izvora rijeke Krčić

master's thesis

• Title (english): Diatoms as biological quality element of Krčić Spring
• Author: Josipa Pichler
• Mentor: Marija Gligora Udovič (mentor)
• Mentor: Jasmina Kamberović (mentor)
• Committee member: Marija Gligora Udovič (predsjednik povjerenstva)
• Committee member: Ivana Maguire (član povjerenstva)
• Committee member: Duje Lisičić (član povjerenstva)
• Committee member: Marko Miliša (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2016-06-13, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Alge kremenjašice su jedna od najvažnijih komponenti perifitona i fitobentosa te je njihov sastav od velike važnosti u procjeni ekološkog stanja kopnenih voda. Fitobentos izvora rijeke Krčić uzorkovan je u nepravilnim razmacima od lipnja 2012. godine do studenog 2015. godine. Izvor je povremen, s pravilnom izmjenom razdoblja stalnog toka i presušivanja. Ukupno je određeno 36 vrsta algi kremenjašica. Dominantne vrste su bile Achnanthidium minutissimum, Meridion circulare var. circulare, Nitzschia fonticola, Navicula cryptotenella te Encyonema silesiacum. Fizikalno-kemijski čimbenici koji opisuju staništesu pH, alkalinitet, provodljivost i brzina strujanja vode. Prema indikatorskim vrijednostima najveći broj dijatomejskih vrsta opisan je kao alkalifilne i cirkumneutralne vrste, karakteristične za eutrofna do oligotrofna staništa. Ekološko stanje izvora procijenjeno je na temelju trofičkog indeksa dijatomeja (TIDRH) i saprobnog indeksa (SIHRIS) i ocjenjeno je kao dobro.

Abstract (english)

Diatoms are one of the most important organisms living in periphyton and phytobenthos. The assemblages of diatoms are of great importance for assessing the ecological status of inland running waters. Diatom communities of Krčić Spring were sampled from June 2012 to November 2015. The Krčić Spring is intermittent, with proper changing of constant flow and dried up period. Diatom flora consisted of 36 taxa, with Achnanthidium minutissimum, Meridion ciculare var. circulare, Nitzschia fonticola, Navicula cryptotenella and Encyonema silesiacum as dominant species. Main environmental variable in during the investigation period spring were: pH, conductivity, alkalinity, oxygen saturation and current velocity. According to their ecological requirement most of the taxa of Krčić Spring were alkaliphilous and circumneutral, eutraphentic and oligo- to eutraphentic, with fairly high to continuously high oxygen requirements. The ecological status of springs was estimated by using Trophic Diatom index (TIDRH) and Saprobic Index (SIHRIS). According to both indices the ecological status of Krčić Spring was moderate.

• Keywords: alge kremenjašice; krški izvor; ekološko stanje
• Keywords (english): benthic diatoms; karstic spring; ecological assessment
• Language: croatian
• URN:NBN: urn:nbn:hr:217:834122
• Study programme: Title: Ecology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra ekologije i zaštite prirode (magistar/magistra ekologije i zaštite prirode)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-05-12 07:57:51