Hariliku männi radiaalse juurdekasvu ja kliima võrdlus erinevates kasvukohatüüpides Hiiumaal
Laen...
Kuupäev
2013
Kättesaadav alates
ainult raamatukogus, only in library
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Dendrokronoloogilised meetodid võimaldavad uurida erinevate kliimategurite mõju puude radiaalsele juurdekasvule. Käesoleva lõputöö eesmärk on analüüsida ja võrrelda kliima (temperatuur ja sademed) mõju hariliku männi (Pinus sylvestris L.) radiaalsele juurdekasvule erinevates kasvukohatüüpides Hiiumaal.
Puursüdamike andmed on kogutud Hiiumaalt 2007. aastal 30 kasvukäigu püsiproovitüki männipuudelt, vastavalt jänesekapsa-mustika, kanarbiku, mustika, pohla ja sambliku kasvukohatüüpidest. Välitööde käigus koguti analüüsipulgad kokku 236 männipuult. Kliimaandmed on Eesti Meteroloogia ja Hüdroloogia Instituudi (EMHI) Ristna meteroloogia- ja hüdroloogiajaamast.
Välitöödel kogutud puursüdamike andmed mõõdeti laboris LINTAB süsteemiga, aastarõngaste seeriad ristdateeriti ning seejärel standardiseeriti. Koostati kasvukohatüüpide kaupa radiaalsed juurdekasvu kronoloogiad. Kliima ja radiaalse juurdekasvu indeksite vahelise seose analüüsimiseks kasutati korrelatsioonianalüüsi, analüüsiperiood 1946- 2006. Lisaks leiti ka kasvukohatüüpide kaupa näitaastad.
Näitaastatest tõusis esile 1957, kus kõigil viiel kasvukohatüübil esines positiivne aasta. Negatiivsed sündmusaastatest tulid esile 1956 ja 1958, kus olid märgitud neli kasvukohatüüpi viiest. Radiaalse juurdekasvu ja kliimategurite statistiliselt olulised näitajad tulid positiivsete seoste rohkusega esile jänesekapsa- mustika, mustika, pohla ja sambliku kasvukohatüüpides. Ainuke kasvukohatüüp, millel ei olnud rohkelt statistiliselt olulisi positiivseid seoseid oli kanarbiku kasvukohatüüp, millel esines oluline statistiline seos ainult aprilli kuu temperatuuridega. Negatiivseid statistiliselt olulisi seoseid juurdekasvu ja õhutemperatuuride vahel esines ainult mustika, pohla ja sambliku kasvukohatüüpidel enamasti eelneva aasta augustis. Sademete ja radiaalse juurdekasvu seose negatiivseid statistiliselt olulisi seoseid esines ainult pohla kasvukohatüübiga septembris.
Antud andmed võimaldavad edaspidi uurida kliimamõju ka männipuude vara- ja hilispuidule erinevates kasvukohatüüpides. Lisaks võib uurida radiaalse juurdekasvu sõltuvust muudest tegurites, näiteks häiringud ja asukoha iseärasused.
The methology of dendrochronology enables to analyze the climate effects on trees radial growth. The aim of this study is to analyse and compare the effect of climate (temperature and precipitation) on the radial growth of Scots pines (Pinus sylvestris L.) on different gowth sites in Hiiumaa. The increment boring samples are collected on the year 2007 from pines on 30 permanent forest growth plots in Hiiumaa accordingly from wood sorrel-blueberry, heather, blueberry, cowberry and lichen forest site types. Samples were taken from 236 pines during fieldwork. The climatic data is from Estonian Meterological and Hydrological Institutes (EMHI) Ristna meterological and hydrological station. The collected data was measured with the LINTAB system in a laboratory, tree- ring time series were crossdated and standardized. Radial growth chronologies were calculated by forest site types. The analyze of relationships between climate and radial growth indexes during the analysis period 1946- 2006 was done with correlation analysis. In addition the indification of pointer years was found. The pointer years reveal that the year 1957 was positive on all of the five growth sites. Negative pointer years revealed in 1956 and 1958 on four growth sites out of five. The radial growth and weather conditions correlation shows that there are frequent statistically important positive connections on wood sorrel-blueberry, blueberry, cowberry and lichen forest site types. The only forest site type that did not have many statistically important connections with the radial growth and weather conditions was the heather growth site, only positive statistically important connection with radial growth and temperature was found in April. Negative statistically important variables to radial growth occurred on blueberry, cowberry and lichen forest site types mostly with the temperatures for August from the prior year. The only negative connection between precipitation and radial growth was on the cowberry forest site types during September. The present data enables to conduct further research on climate influence on early- and latewood in different forest site types. In addition there can study on the radial growth dependence on other factors as disturbances and site characteristics.
The methology of dendrochronology enables to analyze the climate effects on trees radial growth. The aim of this study is to analyse and compare the effect of climate (temperature and precipitation) on the radial growth of Scots pines (Pinus sylvestris L.) on different gowth sites in Hiiumaa. The increment boring samples are collected on the year 2007 from pines on 30 permanent forest growth plots in Hiiumaa accordingly from wood sorrel-blueberry, heather, blueberry, cowberry and lichen forest site types. Samples were taken from 236 pines during fieldwork. The climatic data is from Estonian Meterological and Hydrological Institutes (EMHI) Ristna meterological and hydrological station. The collected data was measured with the LINTAB system in a laboratory, tree- ring time series were crossdated and standardized. Radial growth chronologies were calculated by forest site types. The analyze of relationships between climate and radial growth indexes during the analysis period 1946- 2006 was done with correlation analysis. In addition the indification of pointer years was found. The pointer years reveal that the year 1957 was positive on all of the five growth sites. Negative pointer years revealed in 1956 and 1958 on four growth sites out of five. The radial growth and weather conditions correlation shows that there are frequent statistically important positive connections on wood sorrel-blueberry, blueberry, cowberry and lichen forest site types. The only forest site type that did not have many statistically important connections with the radial growth and weather conditions was the heather growth site, only positive statistically important connection with radial growth and temperature was found in April. Negative statistically important variables to radial growth occurred on blueberry, cowberry and lichen forest site types mostly with the temperatures for August from the prior year. The only negative connection between precipitation and radial growth was on the cowberry forest site types during September. The present data enables to conduct further research on climate influence on early- and latewood in different forest site types. In addition there can study on the radial growth dependence on other factors as disturbances and site characteristics.
Kirjeldus
Märksõnad
mänd, dendrokronoloogia, kliima, kasvukohatüübid, radiaalne juurdekasv, bakalaureusetööd