Analiza šumske flore središnjeg dijela Medvednice u 20-godišnjem razdoblju

master's thesis

• Title (english): Analyses of forest flora on Medvednica Mt central transect over a 20-year period
• Author: Ana Terlević
• Mentor: Sven Jelaska (mentor)
• Committee member: Sven Jelaska (predsjednik povjerenstva)
• Committee member: Martina Šeruga Musić (član povjerenstva)
• Committee member: Jasna Lajtner (član povjerenstva)
• Committee member: Petar Kružić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2018-02-22, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Cilj ovog istraživanja bio je utvrditi je li u razdoblju od 20 godina došlo do florističkih promjena u šumskim zajednicama središnjeg dijela Medvednice. Istraživanje je usmjereno na 20 ploha šumske vegetacije veličine 50×50 metara, čiji je smještaj na terenu određen tijekom istraživanja 1998. godine, kada su prikupljeni prvi floristički podaci. U razdoblju od ožujka do listopada 2017. godine ponovno su prikupljeni podaci o florističkom sastavu istih ploha. Popisi svojti ovih dvaju vremenski udaljenih istraživanja podvrgnuti su analizi životnih oblika, ekoloških indikatorskih vrijednosti, CSR strategija i životnih značajki biljaka. U istraživanju 1998. godine su na 20 istraživanih ploha zabilježene ukupno 184 svojte, dok je 2017. godine zabilježeno 196 svojti. Sličnost dvaju ukupnih popisa je 65,22%. Na svim su plohama i dalje razvijene šumske zajednice, osim na jednoj zbog potpune sječe šume. Promjena udjela R strategije povezana je s promjenom broja svojti, dok su promjene funkcionalne raznolikosti povezane s promjenom udjela C strategije, te udjela autohtone flore i arheofita. Ovaj rad pokazuje da gospodarenje šumom, bilo da je to potpunom sječom određene šumske površine ili povremenim izdvajanjem pojedinačnih stabla, ima najveći učinak na florističke promjene u 20-godišnjem razdoblju i to prvenstveno kroz promjenu količine svjetlosti koja dopire do prizemnog sloja šume.

Abstract (english)

Aim of this study was to determine whether there are floristic changes in forest communities on Medvednica Mt central transect over a 20-year period. The research was focused on 20 forest vegetation plots (50×50 meters), whose placement in the field was determined during the 1998 survey, when first floristic data was gathered. Data on floristic composition of same plots was again gathered from March to October 2017. Taxa records from these two temporally distant surveys were analyzed with respect to their: life forms, ecological indicator values, CSR strategies and plant life traits. In the 1998 survey a total of 184 taxa were recorded on 20 examined plots, while 196 taxa were recorded in 2017. Similarity of two floristic lists was 65,22%. Forest communities were still developed on all plots, except one which underwent clear-cut as a part of forest management practice. Change in R strategy proportion is associated with change in number of taxa, while changes in functional diversity are associated with change in C strategy proportion, as well as in shares of native flora and archaeophytes. This research shows that in 20-years period, forest management has major impact on floristic changes, whether it is by clear-cutting or by selective logging, primarily by changing the amount of light reaching the understory.

• Keywords: klimazonalna vegetacija; svjetlost; florističke promjene; gospodarenje šumom; poremećaj
• Keywords (english): climazonal vegetation; light; floristic changes; forest management; disturbance
• Language: croatian
• URN:NBN: urn:nbn:hr:217:145295
• Study programme: Title: Experimental Biology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra eksperimentalne biologije (magistar/magistra eksperimentalne biologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2020-02-22
• Created on: 2018-03-16 09:16:34