Plant biomarkers as a proxy to study highly decomposed fen peat
Northern peatlands form a large storage of terrestrial carbon and at the same time they provide an important palaeoecological archive to study past climate changes and associated carbon dynamics. One of the most widely used methods to study peatland histories is the plant macrofossil method. However...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/153708 2023-08-20T04:04:28+02:00 Plant biomarkers as a proxy to study highly decomposed fen peat Ronkainen, Tiina Abbott, Geoffrey University of Helsinki, Faculty of Biological and Environmental Sciences, Department of Environmental Sciences, Environmental Change Research unit Helsingin yliopisto, bio- ja ympäristötieteellinen tiedekunta, ympäristötieteiden laitos Helsingfors universitet, bio- och miljövetenskapliga fakulteten, miljövetenskapliga institutionen Väliranta, Minna Tuittila, Eeva-Stiina McClymont, Erin 2015-03-16T13:11:34Z application/pdf http://hdl.handle.net/10138/153708 eng eng Helsingin yliopisto Helsingfors universitet University of Helsinki URN:ISBN:978-951-51-0883-8 Helsinki: Helsingin yliopisto, 2012, Dissertationes Schola Doctoralis Scientiae Circumiectalis, Alimentarie, Biologicae. 2342-5423 Dissertationes Schola Doctoralis Scientiae Circumiectalis, Alimentarie, Biologicae URN:ISSN:2342-5431 http://hdl.handle.net/10138/153708 URN:ISBN:978-951-51-0884-5 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. ympäristötieteet Text Doctoral dissertation (article-based) Artikkeliväitöskirja Artikelavhandling doctoralThesis 2015 ftunivhelsihelda 2023-07-28T06:27:59Z Northern peatlands form a large storage of terrestrial carbon and at the same time they provide an important palaeoecological archive to study past climate changes and associated carbon dynamics. One of the most widely used methods to study peatland histories is the plant macrofossil method. However, peat material of the early succession stages, the fens, is often highly decomposed hampering the identification of the fossil plant remains. Thus, current methods may give only a partial view on the past vegetation, and as a result the accuracy of carbon balance estimations and climate implications may remain low. A new promising method to study past plant assemblages from peat is the geochemical plant biomarker method, which has performed well in less decomposed bog peat environments. In my study I assess the applicability of the geochemical plant biomarker method to study past plant assemblages from highly decomposed fen peat. For the first time I apply a living fen plant biomarker training set to study past fen phases. To do this, I collected and analysed two sets of living key fen plants. The training sets included boreal fen, arctic fen and permafrost peat plateau plants. The biomarker analyses on fossil peat were applied in parallel with macrofossil analyses to two boreal and one arctic permafrost peat section, all known to contain highly decomposed peat. The analyses of living plants showed that the biomarker compositions did not differ between the same species collected from different bioclimatic zones, suggesting that, at least to some extent, plant biomarkers can be used universally beyond the geographical areas where the training set was collected. The plant biomarker analyses indicate that the n-alkanes, and their ratios, are the most useful compounds to separate fen plant groups: Sphagnum mosses and vascular plants. Results showed also that biomarker composition of fen plants did not differ substantially from their bog counterparts. However, results indicated that when a wider combination of plants, ... Doctoral or Postdoctoral Thesis Arctic Peat Peat plateau permafrost Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto Arctic |
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Open Polar |
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Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
ympäristötieteet |
spellingShingle |
ympäristötieteet Ronkainen, Tiina Plant biomarkers as a proxy to study highly decomposed fen peat |
topic_facet |
ympäristötieteet |
description |
Northern peatlands form a large storage of terrestrial carbon and at the same time they provide an important palaeoecological archive to study past climate changes and associated carbon dynamics. One of the most widely used methods to study peatland histories is the plant macrofossil method. However, peat material of the early succession stages, the fens, is often highly decomposed hampering the identification of the fossil plant remains. Thus, current methods may give only a partial view on the past vegetation, and as a result the accuracy of carbon balance estimations and climate implications may remain low. A new promising method to study past plant assemblages from peat is the geochemical plant biomarker method, which has performed well in less decomposed bog peat environments. In my study I assess the applicability of the geochemical plant biomarker method to study past plant assemblages from highly decomposed fen peat. For the first time I apply a living fen plant biomarker training set to study past fen phases. To do this, I collected and analysed two sets of living key fen plants. The training sets included boreal fen, arctic fen and permafrost peat plateau plants. The biomarker analyses on fossil peat were applied in parallel with macrofossil analyses to two boreal and one arctic permafrost peat section, all known to contain highly decomposed peat. The analyses of living plants showed that the biomarker compositions did not differ between the same species collected from different bioclimatic zones, suggesting that, at least to some extent, plant biomarkers can be used universally beyond the geographical areas where the training set was collected. The plant biomarker analyses indicate that the n-alkanes, and their ratios, are the most useful compounds to separate fen plant groups: Sphagnum mosses and vascular plants. Results showed also that biomarker composition of fen plants did not differ substantially from their bog counterparts. However, results indicated that when a wider combination of plants, ... |
author2 |
Abbott, Geoffrey University of Helsinki, Faculty of Biological and Environmental Sciences, Department of Environmental Sciences, Environmental Change Research unit Helsingin yliopisto, bio- ja ympäristötieteellinen tiedekunta, ympäristötieteiden laitos Helsingfors universitet, bio- och miljövetenskapliga fakulteten, miljövetenskapliga institutionen Väliranta, Minna Tuittila, Eeva-Stiina McClymont, Erin |
format |
Doctoral or Postdoctoral Thesis |
author |
Ronkainen, Tiina |
author_facet |
Ronkainen, Tiina |
author_sort |
Ronkainen, Tiina |
title |
Plant biomarkers as a proxy to study highly decomposed fen peat |
title_short |
Plant biomarkers as a proxy to study highly decomposed fen peat |
title_full |
Plant biomarkers as a proxy to study highly decomposed fen peat |
title_fullStr |
Plant biomarkers as a proxy to study highly decomposed fen peat |
title_full_unstemmed |
Plant biomarkers as a proxy to study highly decomposed fen peat |
title_sort |
plant biomarkers as a proxy to study highly decomposed fen peat |
publisher |
Helsingin yliopisto |
publishDate |
2015 |
url |
http://hdl.handle.net/10138/153708 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Peat Peat plateau permafrost |
genre_facet |
Arctic Peat Peat plateau permafrost |
op_relation |
URN:ISBN:978-951-51-0883-8 Helsinki: Helsingin yliopisto, 2012, Dissertationes Schola Doctoralis Scientiae Circumiectalis, Alimentarie, Biologicae. 2342-5423 Dissertationes Schola Doctoralis Scientiae Circumiectalis, Alimentarie, Biologicae URN:ISSN:2342-5431 http://hdl.handle.net/10138/153708 URN:ISBN:978-951-51-0884-5 |
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. |
_version_ |
1774714845660184576 |