Okućene amebe kao bioindikatori sukcesijskih promjena na cretu Trstenik

master's thesis

• Title (english): Testate amoebae as bioindicators of successional changes in vegetation at the Trstenik bog
• Author: Sandra Strelec
• Mentor: Renata Matoničkin Kepčija (mentor)
• Mentor: Vesna Gulin Beljak (komentor)
• Committee member: Renata Matoničkin Kepčija (predsjednik povjerenstva)
• Committee member: Mirela Sertić Perić (član povjerenstva)
• Committee member: Draginja Mrvoš-Sermek (član povjerenstva)
• Committee member: Željka Soldin (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2022-09-26, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Cretovi su specifična vlažna staništa koje karakterizira prisutnost mahova tresetara. Cret
Trstenik relikt je ledenog doba, a ugrožen je sukcesijskim promjenama u vegetaciji i širenjem
trave modre beskoljenke. Okućene amebe su protisti koji u močvarnim staništima postižu
veliku brojnost. Ciljevi istraživanja bili su: i) utvrditi postoji li razlika u sastavu zajednice
okućenih ameba na različitim staništima unutar creta Trstenik (na tipičnim cretnim staništima
i na staništima zahvaćenim sukcesijskim promjenama), ii) utvrditi utjecaj glavnih okolišnih
čimbenika na sastav zajednice na tri različita staništa unutar creta Trstenik; te iii) odrediti
indikatorske vrste na temelju kojih je moguće procijeniti utjecaj klimatskih promjena na
bioraznolikost creta Trstenik. Ukupno je zabilježeno 58 vrsti okućenih ameba, pri čemu je
najveća raznolikost utvrđena na tipičnom cretnom staništu, a najmanja na rubu creta. Na
prostornu raspodjelu okućenih ameba na različitim staništima creta najviše je utjecala pH
vrijednost. Abundancija značajnih indikatorskih vrsta za središte creta značajno pozitivno
korelirala s vlažnošću tla i pH, dok abundancija značajnih indikatorskih vrsta za rub creta
negativno korelirala sa vlažnošću tla. Indikatorske vrste pronađene na rubu creta
karakteristične su za suha staništa. Rezultati ovog istraživanja pokazuju da je cret Trstenik još
uvijek ekosustav relativno visoke raznolikosti vrsta okućenih ameba, ali i da su sukcesijske
promjene vidljive na pojedinim dijelovima creta i moguće ih je detektirati na mikroskali.tresetišta,

Abstract (english)

Bogs are specific wet habitats where various species of Sphagnum mosses predominate. The
Trstenik bog is a relic from the Ice Age, currently threatened by successional changes in
vegetation and the spread of purple moor-grass. Testate amoebae are a polyphyletic group of
protists particularly numerous and diverse in peat bogs. The objectives of the study were to: i)
determine whether there are differences in testate amoeba community composition in different
habitats in Trstenik bog; ii) determine the effects of key environmental factors on testate
amoeba community composition; and iii) identify potential indicator species. A total of 58
species of testate amoebae were recorded. The highest diversity of species was recorded in the
typical bog habitat, while the bog edge had the lowest diversity. pH was the most important
environmental factor determining the spatial distribution of species among the three habitats.
Abundance of the indicator species identified for the typical bog habitat was positively
correlated with soil moisture and pH, while the abundance of those identified for the bog edge
was negatively correlated with soil moisture. The results of this study show that the Trstenik
bog continues to have high diversity of testate amoebae species, but that successional changes
are present and can be successfully detected at the microscale.

• Keywords: tresetišta; ekologija; klimatske promjene; raznolikost; vlažnost; pH
• Keywords (english): peatlands; ecology; climate change; diversity; moisture; pH
• Language: croatian
• URN:NBN: urn:nbn:hr:217:164465
• Study programme: Title: Integrated undergraduate and graduate university study of Biology and Chemistry Education; specializations in: Integrated undergraduate and graduate university study of Biology and Chemistry Education; Course: Integrated undergraduate and graduate university study of Biology and Chemistry Education; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: magistar/magistra edukacije biologije i kemije (magistar/magistra edukacije biologije i kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Embargoed access; Embargo expiration date: 2024-09-26
• Created on: 2022-10-20 12:37:18