Aidu karjääri taasmetsastatud aladel alustaimestiku analüüs
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Kuupäev
2012
Kättesaadav alates
ainult raamatukogus, only in library
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Põlevkivi karjääriviisilise kaevandamisega rikutakse suuri maa-alasid. Tõstmaks rikutud alade majanduslikku ja keskkonnaalast väärtust, tuleb need rekultiveerida. Kuna karjäärialadel valitsevad ekstreemsed tingimused, sobivad taasmetsastamiseks vähesed puuliigid, Aidu karjääris proovialadel oli selleks harilik mänd. Limiteeritud keskkonna tingimuste tõttu on piiratud ka taim- ja sammalkatte liigirikkus.
Aastal 2012 Aidu karjäär suletakse ja lõpetatakse vee väljapumpamine karjäärist. Antud töö eesmärgiks oli teostada alustaimestiku analüüs Aidu karjääri rekultiveeritud aladel enne veerežiimi muutumist. Uurimistöö läbiviimiseks koguti proovialadel taimestiku ja mullastiku andmeid. Muldi analüüsiti laboris, taimi analüüsiti regressioonianalüüsi ja kanoonilise vastavusanalüüsi meetodil. Tulemustest ilmnes seos taimeliikide arvu ja puistu vanuse, puude vahelise kauguse ja mullakihi paksuse vahel. Välitööde käigus määratud taimeliigid on sarnased ka teistes põlevkivikarjääri uurimistöödes leitud taimeliikidega. Kogutud andmeid saab kasutada järgmises uurimistöös, kui viiakse läbi uuesti alustaimestiku analüüs Aidu karjääris, peale seda kui seal on lõppenud vee väljapumpamine.
Quarrying oil shale destroys vegetation over large areas of land, that need to be recultivated in order to restore their economical and environmental value. The extreme conditions in quarry areas allow only a few suitable tree species to be planted for reforestation, e.g. the Scots pine in Aidu quarry. Due to these environmental conditions even herb and moss coverage are fairly limited. In 2012 the Aidu quarry will be closed down, whereas the water is to be pumped out of the quarry. The goal of this study is to carry out an analysis of the understorey in the reforested areas in Aidu quarry before the water regime will change. For the purpose and conduct of this research, data on vegetation and soils was collected from plots. Soils were analysed in a laboratory, whereas herbs were analysed by means of regression analysis and canonical correspondence analysis. The results showed a correlation between the number of herb species and the stand age, lenght between trees and soil thickness. Herb species determined during fieldwork were similar to herb species found in other reclaimed quarries. Gathered data can be used in the next understorey analysis in Aidu quarry, when water has been pumped out of the quarry.
Quarrying oil shale destroys vegetation over large areas of land, that need to be recultivated in order to restore their economical and environmental value. The extreme conditions in quarry areas allow only a few suitable tree species to be planted for reforestation, e.g. the Scots pine in Aidu quarry. Due to these environmental conditions even herb and moss coverage are fairly limited. In 2012 the Aidu quarry will be closed down, whereas the water is to be pumped out of the quarry. The goal of this study is to carry out an analysis of the understorey in the reforested areas in Aidu quarry before the water regime will change. For the purpose and conduct of this research, data on vegetation and soils was collected from plots. Soils were analysed in a laboratory, whereas herbs were analysed by means of regression analysis and canonical correspondence analysis. The results showed a correlation between the number of herb species and the stand age, lenght between trees and soil thickness. Herb species determined during fieldwork were similar to herb species found in other reclaimed quarries. Gathered data can be used in the next understorey analysis in Aidu quarry, when water has been pumped out of the quarry.
Kirjeldus
Märksõnad
alustaimestu, põlevkivikarjäärid, metsauuendus, Aidu, bakalaureusetööd