Soil moisture and its importance for tundra plants
Water is fundamental for plant life, as it affects the growth, survival, and spatial patterns of vegetation. Here, I explored soil moisture and its ecosystem effects to answer: 1) What controls soil moisture variation? 2) How is water linked to vegetation? 3) Do plants influence water resources? I f...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/313993 2023-08-20T04:06:28+02:00 Soil moisture and its importance for tundra plants Kemppinen, Julia Normand, Signe University of Helsinki, Faculty of Science Doctoral Programme in Geosciences Helsingin yliopisto, matemaattis-luonnontieteellinen tiedekunta Geotieteiden tohtoriohjelma Helsingfors universitet, matematisk-naturvetenskapliga fakulteten Doktorandprogrammet i geovetenskap Luoto, Miska 2020-04-15T04:48:00Z application/pdf http://hdl.handle.net/10138/313993 eng eng Helsingin yliopisto Helsingfors universitet University of Helsinki URN:ISBN:978-951-51-4932-9 Turku: Painosalama, 2020, Department of Geosciences and Geography. 1798-7911 http://hdl.handle.net/10138/313993 URN:ISBN:978-951-51-4933-6 Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. Publikationen är skyddad av upphovsrätten. Den får läsas och skrivas ut för personligt bruk. Användning i kommersiellt syfte är förbjuden. maantiede Text Doctoral dissertation (article-based) Artikkeliväitöskirja Artikelavhandling doctoralThesis 2020 ftunivhelsihelda 2023-07-28T06:32:46Z Water is fundamental for plant life, as it affects the growth, survival, and spatial patterns of vegetation. Here, I explored soil moisture and its ecosystem effects to answer: 1) What controls soil moisture variation? 2) How is water linked to vegetation? 3) Do plants influence water resources? I focused on the moisture of the top-soil layer (0 – 10 cm) in Fennoscandian mountain tundra. First, I evaluated environmental conditions controlling soil moisture variation. I used different modelling methods (generalized linear models, generalized additive models, generalized boosted regression models, and random forests) to account for the uncertainties related to each multivariate technique. On average, the model fit was R2 = 0.60 and the predictive performance R2 = 0.47. The spatial variation of soil moisture was most related to a topographic proxy of soil water accumulation and the depth of the organic soil layer. These results demonstrated that moisture can be modelled using topography and soil data. Secondly, I examined the influence of three water aspects (spatial and temporal variation of soil moisture, and fluvial disturbance) on vascular plants, mosses, and lichens. I used species distribution modelling, a framework for analysing the spatial patterns of species in relation to the environment. The species groups were most related to the spatial variation of soil moisture, albeit species had diverse responses. In general, water is not scarce in the tundra, yet the water aspects improved the models highlighting water as a multifaceted driver of the ecosystem. In addition, I investigated if plant-environment relationships were universal in the tundra. Here, I used hierarchical generalized additive models to compare sites across the hemispheres. I combined plant trait records with data on their environmental drivers. The local variation of conditions within the sites was overridden by global relationships indicating that these links are generalisable across the tundra sites. The results provide empirical evidence ... Doctoral or Postdoctoral Thesis Fennoscandian Tundra Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
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Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
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English |
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maantiede Kemppinen, Julia Soil moisture and its importance for tundra plants |
topic_facet |
maantiede |
description |
Water is fundamental for plant life, as it affects the growth, survival, and spatial patterns of vegetation. Here, I explored soil moisture and its ecosystem effects to answer: 1) What controls soil moisture variation? 2) How is water linked to vegetation? 3) Do plants influence water resources? I focused on the moisture of the top-soil layer (0 – 10 cm) in Fennoscandian mountain tundra. First, I evaluated environmental conditions controlling soil moisture variation. I used different modelling methods (generalized linear models, generalized additive models, generalized boosted regression models, and random forests) to account for the uncertainties related to each multivariate technique. On average, the model fit was R2 = 0.60 and the predictive performance R2 = 0.47. The spatial variation of soil moisture was most related to a topographic proxy of soil water accumulation and the depth of the organic soil layer. These results demonstrated that moisture can be modelled using topography and soil data. Secondly, I examined the influence of three water aspects (spatial and temporal variation of soil moisture, and fluvial disturbance) on vascular plants, mosses, and lichens. I used species distribution modelling, a framework for analysing the spatial patterns of species in relation to the environment. The species groups were most related to the spatial variation of soil moisture, albeit species had diverse responses. In general, water is not scarce in the tundra, yet the water aspects improved the models highlighting water as a multifaceted driver of the ecosystem. In addition, I investigated if plant-environment relationships were universal in the tundra. Here, I used hierarchical generalized additive models to compare sites across the hemispheres. I combined plant trait records with data on their environmental drivers. The local variation of conditions within the sites was overridden by global relationships indicating that these links are generalisable across the tundra sites. The results provide empirical evidence ... |
author2 |
Normand, Signe University of Helsinki, Faculty of Science Doctoral Programme in Geosciences Helsingin yliopisto, matemaattis-luonnontieteellinen tiedekunta Geotieteiden tohtoriohjelma Helsingfors universitet, matematisk-naturvetenskapliga fakulteten Doktorandprogrammet i geovetenskap Luoto, Miska |
format |
Doctoral or Postdoctoral Thesis |
author |
Kemppinen, Julia |
author_facet |
Kemppinen, Julia |
author_sort |
Kemppinen, Julia |
title |
Soil moisture and its importance for tundra plants |
title_short |
Soil moisture and its importance for tundra plants |
title_full |
Soil moisture and its importance for tundra plants |
title_fullStr |
Soil moisture and its importance for tundra plants |
title_full_unstemmed |
Soil moisture and its importance for tundra plants |
title_sort |
soil moisture and its importance for tundra plants |
publisher |
Helsingin yliopisto |
publishDate |
2020 |
url |
http://hdl.handle.net/10138/313993 |
genre |
Fennoscandian Tundra |
genre_facet |
Fennoscandian Tundra |
op_relation |
URN:ISBN:978-951-51-4932-9 Turku: Painosalama, 2020, Department of Geosciences and Geography. 1798-7911 http://hdl.handle.net/10138/313993 URN:ISBN:978-951-51-4933-6 |
op_rights |
Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. Publikationen är skyddad av upphovsrätten. Den får läsas och skrivas ut för personligt bruk. Användning i kommersiellt syfte är förbjuden. |
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1774717517304954880 |