Alustaimestiku analüüs taasmetsastatud Aidu karjääri proovitükkidel
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Kuupäev
2018
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Aidu põlevkivi karjäär avati 1974. aastal. Põlevkivi kaevandati peamiselt karjääriviisiliselt.
Taastamaks majanduslik-ja keskkonnaväärtuslik ala, endine karjäär rekultiveeriti. 2012.
aastal suleti Aidu karjäär ja lõpetati vee väljapumpamine, mille tõttu looduslik veerežiim
taastus. 2016. aastal tehti kordusmõõtmine endistel 2011. aastal rajatud püsiproovitükkidel.
Töö eesmärgiks oli analüüsida proovialade alustaimestikku, kirjeldada liigirikkust ning leida
liikide sõltuvust raietes ja mullastikust. Kasutati erinevaid andmestikke. Tunnuste vaheliste
sõltuvuste leidmiseks kasutati regressioon- ja dispersioonanalüüsi, mida tehti vabavaras R.
Alustaimestiku liigirikkuse analüüsil selgus, et 60 proovitükil kasvas 149 soontaimeliiki, 15
puuliiki ja 67 samblaliiki. Leiti üheksa III kaitsekategooria ja kaks II kaitsekategooria
käpaliste sugukonda kuuluvat liiki. Regressioonanalüüsi tulemusel tuli seos soontaimede ja
mullapaksuse vahel. Samblaliikide arvu ja sammalde mitmekesisuse, mulla fosfori ja
lämmastiku sisalduse ning mulla ja kõdu pH vahel. Leiti ka seos soontaime katvuse, puude
arvu ja puude kõrguse vahel. Dispersioonanalüüsiga leiti seost, käpaliste- ja samblaliikide
arvu, soontaime-, sammalkatvuse ja peapuuliigi vahel. Kogutud ja analüüsitud andmeid saab
kasutada edasistes uurimistöödes, et võrrelda alustaimestiku taastumist.
The Aidu oil shale quarry was opened in 1974. Oil shale was mined mainly in the open quarry way, in violation of the land cover. Restoration of the economic and environmental value of the area, was recultivated. In 2012, Aidu quarry was closed and water discharging was stopped, due to the natural water regime was restored. In 2016 carried out re-measurements on the former observation plots established in 2011. The aim of the research was to analyze the undergrowth vegetation of the sample plots, to describe the species richness and to find dependence of the species on the cutting area and soil. On this research was used 2016 remeasurement data. The dependence was found using a regression and dispersion analyses that was performed in R software. The analysis of the biodiversity of the undergrowth vegetation revealed that in the 60 plots there was, 149 species of vascular plants, 15 species of trees and 67 species of moss. Found nine III protection category species and two II category species of Orchidacea family. Regressionanalysis shows relationship between soil and underground vegetation. The number of moss species and moss diversity index affects phosphorous and nitrogen content, humus soil and the pH in the soil. Coverage of the plants have relationship between height of stands and number of trees. Anova test shows relationship Orchidacea, number of moss species, moss diversity index and trees. Collected and analyzed data can be used in further research to compare the restoration of undergrowth vegetation.
The Aidu oil shale quarry was opened in 1974. Oil shale was mined mainly in the open quarry way, in violation of the land cover. Restoration of the economic and environmental value of the area, was recultivated. In 2012, Aidu quarry was closed and water discharging was stopped, due to the natural water regime was restored. In 2016 carried out re-measurements on the former observation plots established in 2011. The aim of the research was to analyze the undergrowth vegetation of the sample plots, to describe the species richness and to find dependence of the species on the cutting area and soil. On this research was used 2016 remeasurement data. The dependence was found using a regression and dispersion analyses that was performed in R software. The analysis of the biodiversity of the undergrowth vegetation revealed that in the 60 plots there was, 149 species of vascular plants, 15 species of trees and 67 species of moss. Found nine III protection category species and two II category species of Orchidacea family. Regressionanalysis shows relationship between soil and underground vegetation. The number of moss species and moss diversity index affects phosphorous and nitrogen content, humus soil and the pH in the soil. Coverage of the plants have relationship between height of stands and number of trees. Anova test shows relationship Orchidacea, number of moss species, moss diversity index and trees. Collected and analyzed data can be used in further research to compare the restoration of undergrowth vegetation.
Kirjeldus
Bakalaureusetöö
Loodusvarade kasutamise ja kaitse õppekaval
Märksõnad
bakalaureusetööd, rekultiveerimine, põlevkivikarjäärid, metsade taastamine