Makroravinteiden, hydrologian ja geomorfologian vaikutus kasvilajirunsauteen ja biomassaan subarktisessa ympäristössä
This thesis is motivated by the need for more knowledge about the factors which influence the plant species richness and biomass in subarctic and alpine environments. It is known that the effects of climate warming will be most severe in arctic, subarctic and alpine regions. A warmer climate will ch...
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Helsingfors universitet
2012
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Online Access: | http://hdl.handle.net/10138/230483 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/230483 2023-08-20T04:04:59+02:00 Makroravinteiden, hydrologian ja geomorfologian vaikutus kasvilajirunsauteen ja biomassaan subarktisessa ympäristössä Vuollet, Johanna Helsingin yliopisto, Matemaattis-luonnontieteellinen tiedekunta, Geotieteiden ja maantieteen laitos University of Helsinki, Faculty of Science, Department of Geosciences and Geography Helsingfors universitet, Matematisk-naturvetenskapliga fakulteten, Institutionen för geovetenskaper och geografi 2012 application/pdf http://hdl.handle.net/10138/230483 fin fin Helsingfors universitet University of Helsinki Helsingin yliopisto URN:NBN:fi-fe2017112252298 http://hdl.handle.net/10138/230483 Geography Maantiede Geografi pro gradu-avhandlingar pro gradu -tutkielmat master's thesis 2012 ftunivhelsihelda 2023-07-28T06:33:25Z This thesis is motivated by the need for more knowledge about the factors which influence the plant species richness and biomass in subarctic and alpine environments. It is known that the effects of climate warming will be most severe in arctic, subarctic and alpine regions. A warmer climate will change the vegetation composition and biomass production in these environments. In this thesis I investigate the effects of six nutrients (Ca, Na, Mg, Fe, K and P), hydrological conditions early in the growing season and geomorphology on plant species richness and biomass in the northernmost part of Finland, Kilpisjärvi. The conditions in the study site are subarctic-alpine. In subarctic and alpine regions the varying topography in macro and micro scales leads to a wide variety of habitats even within small spatial dimensions. Materials in this study include field observations about the plant species richness and biomass, geomorphological processes and hydrological conditions; chemical analysis of soil samples; and topography variables derived from a digital elevation model. Methods used are generalized linear models and variation partitioning, which are both more and more used in ecological and geomorphological studies. The results suggest that the most influential of the environmental variables on the plant species richness and biomass is geomorphology. It is the most influential explanatory variable on total, vascular plant, bryophyte and lichen species richness as well as on total, bryophyte and lichen biomass. The amount geomorphology explains varies between 9 - 41 %. The variation in vascular plant species richness is best explained by hydrological conditions (14 %). The variables chosen for this study are able to explain over 50% of the species richness response variables. For total, bryophyte and lichen biomass the amount explained is about 20 - 47 %, and even 77 % of total biomass is explained by the variables. Geomorphology, hydrology and nutrients are able to explain better the variation in biomass than in ... Master Thesis Arctic Kilpisjärvi Subarctic Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto Arctic Kilpisjärvi ENVELOPE(20.767,20.767,69.034,69.034) |
institution |
Open Polar |
collection |
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
Finnish |
topic |
Geography Maantiede Geografi |
spellingShingle |
Geography Maantiede Geografi Vuollet, Johanna Makroravinteiden, hydrologian ja geomorfologian vaikutus kasvilajirunsauteen ja biomassaan subarktisessa ympäristössä |
topic_facet |
Geography Maantiede Geografi |
description |
This thesis is motivated by the need for more knowledge about the factors which influence the plant species richness and biomass in subarctic and alpine environments. It is known that the effects of climate warming will be most severe in arctic, subarctic and alpine regions. A warmer climate will change the vegetation composition and biomass production in these environments. In this thesis I investigate the effects of six nutrients (Ca, Na, Mg, Fe, K and P), hydrological conditions early in the growing season and geomorphology on plant species richness and biomass in the northernmost part of Finland, Kilpisjärvi. The conditions in the study site are subarctic-alpine. In subarctic and alpine regions the varying topography in macro and micro scales leads to a wide variety of habitats even within small spatial dimensions. Materials in this study include field observations about the plant species richness and biomass, geomorphological processes and hydrological conditions; chemical analysis of soil samples; and topography variables derived from a digital elevation model. Methods used are generalized linear models and variation partitioning, which are both more and more used in ecological and geomorphological studies. The results suggest that the most influential of the environmental variables on the plant species richness and biomass is geomorphology. It is the most influential explanatory variable on total, vascular plant, bryophyte and lichen species richness as well as on total, bryophyte and lichen biomass. The amount geomorphology explains varies between 9 - 41 %. The variation in vascular plant species richness is best explained by hydrological conditions (14 %). The variables chosen for this study are able to explain over 50% of the species richness response variables. For total, bryophyte and lichen biomass the amount explained is about 20 - 47 %, and even 77 % of total biomass is explained by the variables. Geomorphology, hydrology and nutrients are able to explain better the variation in biomass than in ... |
author2 |
Helsingin yliopisto, Matemaattis-luonnontieteellinen tiedekunta, Geotieteiden ja maantieteen laitos University of Helsinki, Faculty of Science, Department of Geosciences and Geography Helsingfors universitet, Matematisk-naturvetenskapliga fakulteten, Institutionen för geovetenskaper och geografi |
format |
Master Thesis |
author |
Vuollet, Johanna |
author_facet |
Vuollet, Johanna |
author_sort |
Vuollet, Johanna |
title |
Makroravinteiden, hydrologian ja geomorfologian vaikutus kasvilajirunsauteen ja biomassaan subarktisessa ympäristössä |
title_short |
Makroravinteiden, hydrologian ja geomorfologian vaikutus kasvilajirunsauteen ja biomassaan subarktisessa ympäristössä |
title_full |
Makroravinteiden, hydrologian ja geomorfologian vaikutus kasvilajirunsauteen ja biomassaan subarktisessa ympäristössä |
title_fullStr |
Makroravinteiden, hydrologian ja geomorfologian vaikutus kasvilajirunsauteen ja biomassaan subarktisessa ympäristössä |
title_full_unstemmed |
Makroravinteiden, hydrologian ja geomorfologian vaikutus kasvilajirunsauteen ja biomassaan subarktisessa ympäristössä |
title_sort |
makroravinteiden, hydrologian ja geomorfologian vaikutus kasvilajirunsauteen ja biomassaan subarktisessa ympäristössä |
publisher |
Helsingfors universitet |
publishDate |
2012 |
url |
http://hdl.handle.net/10138/230483 |
long_lat |
ENVELOPE(20.767,20.767,69.034,69.034) |
geographic |
Arctic Kilpisjärvi |
geographic_facet |
Arctic Kilpisjärvi |
genre |
Arctic Kilpisjärvi Subarctic |
genre_facet |
Arctic Kilpisjärvi Subarctic |
op_relation |
URN:NBN:fi-fe2017112252298 http://hdl.handle.net/10138/230483 |
_version_ |
1774715411699335168 |