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dc.contributor.advisorKorjus, Henn
dc.contributor.advisorKiviste, Andres
dc.contributor.advisorvon Gadow, Klaus
dc.contributor.authorMaleki, Kobra
dc.contributor.otherPetrauskas, Edmundas (opponent)
dc.date.accessioned2016-11-08T13:19:14Z
dc.date.available2016-11-08T13:19:14Z
dc.date.issued2016
dc.identifier.isbn978-9949-569-60-1
dc.identifier.issn2382-7076
dc.identifier.urihttp://hdl.handle.net/10492/3026
dc.identifier.urihttp://doi.org/10.15159/emu.16
dc.descriptionA Thesis for applying for the degree of Doctor of Philosophy in Forestryeng
dc.description.abstractThe thesis is designed to establish and assess different approaches of competition measurement, incorporated with various competitor selection methods, focusing on silver birch in Estonia. The effect of competition and some other tree and stand variables on the growth and the mortality of trees are explored. Moreover, stands are characterized employing several structural indices calculated for sample plots of different shapes and sizes. The findings indicate that the measures including the trees spatial information, have superiority over the measures ignoring the trees locations within a forest stand, when studying the dynamics of stands and their effects on the structure and functioning of forest ecosystems. Also, plots with different shapes showed almost equal estimation accuracy, thus circular plots are preferred due to their smaller ratio of perimeter to surface. Besides, the optimum plot size depends on the stand structure, with an attempt to keep sample plots as small as possible to reduce the assessment efforts and costs.eng
dc.description.abstractDoktoritöö eesmärgiks on uurida erinevaid meetodeid puudevahelise konkurentsi hindamiseks ja konkurentpuude kindlakstegemiseks eelkõige Eestis kogutud arukase puistute andmetele tuginedes. Põhjalikumalt uuriti puudevahelise konkurentsi ning puude ja puistu takseertunnuste seoseid puude kasvu ja suremusega. Lisaks kirjeldati puistute seisundit mitmete struktuuriindeksite abil erineva suuruse ja kujuga proovialasid kasutades. Töö tulemused näitavad, et puistute dünaamika uurimisel on puude ruumilist paiknemist arvestavatel tunnustel eeliseid võrreldes tunnustega, mis ei arvesta puude ruumilist paiknemist. Erineva kujuga proovialad andsid takseertunnuste hinnangu küll sarnase täpsusega, kuid ringikujulisi proovialasid tuleks eelistada nende ümbermõõdu-pindala väiksema suhtarvu tõttu. Optimaalne prooviala suurus sõltub puistu struktuurist, kuid proovialad tuleks siiski valida võimalikult väiksena, et vähendada mõõtmistele kuluvat aega ja vahendeid.est
dc.description.sponsorshipPublication of this dissertation is supported by the Estonian University of Life Sciences and by the Doctoral School of Earth Sciences and Ecology created under the auspices of the European Social Fund.eng
dc.publisherEesti Maaülikool
dc.relation.ispartofseriesEesti Maaülikooli doktoritöödest
dc.rights.urihttps://www.riigiteataja.ee/en/eli/ee/Riigikogu/act/519062017005/consolide
dc.subjectdissertatsioonidest
dc.subjectmetsandusest
dc.subjectmetsadest
dc.subjectmetsaökosüsteemidest
dc.subjectpuistudest
dc.subjectkasvest
dc.subjectarukaskest
dc.subjectstruktuurest
dc.subjectmõjudest
dc.subjectdissertationseng
dc.subjectforestryeng
dc.subjectforestseng
dc.subjectforest ecosystemseng
dc.subjectforest standseng
dc.subjectgrowtheng
dc.subjectsilver bircheng
dc.subjectstructureeng
dc.subjectimpactseng
dc.titleAnalysis of tree competition and structural indices with a focus on modelling Silver birch (Betula pendula Roth) standseng
dc.title.alternativePuude konkurentsi- ja struktuuriindeksite analüüs arukase (Betula pendula Roth) puistute modelleerimise eesmärgilest
dc.typeThesiseng
dc.date.defensed2016-12-09
dc.type.qualificationnamePhD


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