DIRECT AND INDIRECT EFFECTS OF CLIMATIC CHANGES ON VEGETATION PRODUCTIVITY AND SPECIES COMPOSITION OF PERMAFROST PEATLANDS
International audience Strong climate warming and altered precipitation regimes are predicted to occur at higherlatitudes this century, with potentially major consequences for vegetation productivity andcarbon sequestration. Although northern permafrost peatlands contain one-third of the world’ssoil...
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Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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HAL CCSD
2012
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Online Access: | https://hal.inrae.fr/tel-04553164 https://hal.inrae.fr/tel-04553164/document https://hal.inrae.fr/tel-04553164/file/KEUPER2012_PhDthesis_final.pdf |
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ftinraparis:oai:HAL:tel-04553164v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Institut National de la Recherche Agronomique: ProdINRA |
op_collection_id |
ftinraparis |
language |
English |
topic |
Plant-soil interactions climate change permafrost peatlands nitrogen carbon Experimental research Interactions plante-sol Azote Pergelisol Tourbieres [SDE]Environmental Sciences |
spellingShingle |
Plant-soil interactions climate change permafrost peatlands nitrogen carbon Experimental research Interactions plante-sol Azote Pergelisol Tourbieres [SDE]Environmental Sciences Keuper, Frida DIRECT AND INDIRECT EFFECTS OF CLIMATIC CHANGES ON VEGETATION PRODUCTIVITY AND SPECIES COMPOSITION OF PERMAFROST PEATLANDS |
topic_facet |
Plant-soil interactions climate change permafrost peatlands nitrogen carbon Experimental research Interactions plante-sol Azote Pergelisol Tourbieres [SDE]Environmental Sciences |
description |
International audience Strong climate warming and altered precipitation regimes are predicted to occur at higherlatitudes this century, with potentially major consequences for vegetation productivity andcarbon sequestration. Although northern permafrost peatlands contain one-third of the world’ssoil organic carbon, little is known about responses of their vascular plant communities toclimatic changes. Both direct effects, of warming and altered precipitation, as well as indirecteffects, through permafrost thawing and increased nutrient-availability, are expected. In thisthesis I aimed to investigate how short- to long-term experimental climate manipulations,relevant to different predicted future climate scenarios, affect vascular plant productivity andspecies composition in permafrost peatlands. Specifically, answers were sought to the followingresearch questions: (1) How do spring- and summer warming, and increased snow cover affectspecies-specific growth responses and species composition in northern permafrost peatlands;(2) How does increased summer precipitation affect species-specific growth responses andspecies composition in northern permafrost peatlands; and (3) Can permafrost thawing affectspecies-specific growth responses and species composition in northern permafrost peatlandsthrough a release of plant-available N? To answer these questions three experiments wereperformed, investigating vegetation responses to: (a) spring- and summer warming and a thickersnow cover (Chapter 2); (b) increased summer precipitation (Chapter 3); and (c) increasednutrient availability at the permafrost thaw front (Chapter 5). Moreover, the amount of plant-available nitrogen (N) that can be released from thawing permafrost into these peatlands in thenear-future was quantified (Chapter 4). All experiments were performed on Sphagnum fuscum-dominated permafrost peatlands the Abisko area, northern Sweden. The increased summerprecipitation experiment (Chapter 3) was complemented by a sister-experiment in the KytalykReserve in ... |
author2 |
BioEcoAgro - Equipe 2 - Integrated functioning of the soil-plant system and exchanges between the ecosystem and the hydrosphere and the atmosphere BioEcoAgro - UMR transfrontalière INRAe - UMRT1158 Université d'Artois (UA)-Université de Liège-Université de Picardie Jules Verne (UPJV)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-JUNIA (JUNIA) Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Université d'Artois (UA)-Université de Liège-Université de Picardie Jules Verne (UPJV)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-JUNIA (JUNIA) Université catholique de Lille (UCL)-Université catholique de Lille (UCL) Vrije Universiteit Amsterdam M.A.P.A. Aerts P.M. van Bodegom |
format |
Doctoral or Postdoctoral Thesis |
author |
Keuper, Frida |
author_facet |
Keuper, Frida |
author_sort |
Keuper, Frida |
title |
DIRECT AND INDIRECT EFFECTS OF CLIMATIC CHANGES ON VEGETATION PRODUCTIVITY AND SPECIES COMPOSITION OF PERMAFROST PEATLANDS |
title_short |
DIRECT AND INDIRECT EFFECTS OF CLIMATIC CHANGES ON VEGETATION PRODUCTIVITY AND SPECIES COMPOSITION OF PERMAFROST PEATLANDS |
title_full |
DIRECT AND INDIRECT EFFECTS OF CLIMATIC CHANGES ON VEGETATION PRODUCTIVITY AND SPECIES COMPOSITION OF PERMAFROST PEATLANDS |
title_fullStr |
DIRECT AND INDIRECT EFFECTS OF CLIMATIC CHANGES ON VEGETATION PRODUCTIVITY AND SPECIES COMPOSITION OF PERMAFROST PEATLANDS |
title_full_unstemmed |
DIRECT AND INDIRECT EFFECTS OF CLIMATIC CHANGES ON VEGETATION PRODUCTIVITY AND SPECIES COMPOSITION OF PERMAFROST PEATLANDS |
title_sort |
direct and indirect effects of climatic changes on vegetation productivity and species composition of permafrost peatlands |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.inrae.fr/tel-04553164 https://hal.inrae.fr/tel-04553164/document https://hal.inrae.fr/tel-04553164/file/KEUPER2012_PhDthesis_final.pdf |
long_lat |
ENVELOPE(18.829,18.829,68.349,68.349) |
geographic |
Abisko |
geographic_facet |
Abisko |
genre |
Abisko Northern Sweden permafrost |
genre_facet |
Abisko Northern Sweden permafrost |
op_source |
https://hal.inrae.fr/tel-04553164 Environmental Sciences. Vrije Universiteit Amsterdam, 2012. English. ⟨NNT : ⟩ |
op_relation |
tel-04553164 https://hal.inrae.fr/tel-04553164 https://hal.inrae.fr/tel-04553164/document https://hal.inrae.fr/tel-04553164/file/KEUPER2012_PhDthesis_final.pdf |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
_version_ |
1802649089232338944 |
spelling |
ftinraparis:oai:HAL:tel-04553164v1 2024-06-23T07:44:52+00:00 DIRECT AND INDIRECT EFFECTS OF CLIMATIC CHANGES ON VEGETATION PRODUCTIVITY AND SPECIES COMPOSITION OF PERMAFROST PEATLANDS Keuper, Frida BioEcoAgro - Equipe 2 - Integrated functioning of the soil-plant system and exchanges between the ecosystem and the hydrosphere and the atmosphere BioEcoAgro - UMR transfrontalière INRAe - UMRT1158 Université d'Artois (UA)-Université de Liège-Université de Picardie Jules Verne (UPJV)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-JUNIA (JUNIA) Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Université d'Artois (UA)-Université de Liège-Université de Picardie Jules Verne (UPJV)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-JUNIA (JUNIA) Université catholique de Lille (UCL)-Université catholique de Lille (UCL) Vrije Universiteit Amsterdam M.A.P.A. Aerts P.M. van Bodegom 2012-11-06 https://hal.inrae.fr/tel-04553164 https://hal.inrae.fr/tel-04553164/document https://hal.inrae.fr/tel-04553164/file/KEUPER2012_PhDthesis_final.pdf en eng HAL CCSD tel-04553164 https://hal.inrae.fr/tel-04553164 https://hal.inrae.fr/tel-04553164/document https://hal.inrae.fr/tel-04553164/file/KEUPER2012_PhDthesis_final.pdf http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess https://hal.inrae.fr/tel-04553164 Environmental Sciences. Vrije Universiteit Amsterdam, 2012. English. ⟨NNT : ⟩ Plant-soil interactions climate change permafrost peatlands nitrogen carbon Experimental research Interactions plante-sol Azote Pergelisol Tourbieres [SDE]Environmental Sciences info:eu-repo/semantics/doctoralThesis Theses 2012 ftinraparis 2024-06-04T14:56:34Z International audience Strong climate warming and altered precipitation regimes are predicted to occur at higherlatitudes this century, with potentially major consequences for vegetation productivity andcarbon sequestration. Although northern permafrost peatlands contain one-third of the world’ssoil organic carbon, little is known about responses of their vascular plant communities toclimatic changes. Both direct effects, of warming and altered precipitation, as well as indirecteffects, through permafrost thawing and increased nutrient-availability, are expected. In thisthesis I aimed to investigate how short- to long-term experimental climate manipulations,relevant to different predicted future climate scenarios, affect vascular plant productivity andspecies composition in permafrost peatlands. Specifically, answers were sought to the followingresearch questions: (1) How do spring- and summer warming, and increased snow cover affectspecies-specific growth responses and species composition in northern permafrost peatlands;(2) How does increased summer precipitation affect species-specific growth responses andspecies composition in northern permafrost peatlands; and (3) Can permafrost thawing affectspecies-specific growth responses and species composition in northern permafrost peatlandsthrough a release of plant-available N? To answer these questions three experiments wereperformed, investigating vegetation responses to: (a) spring- and summer warming and a thickersnow cover (Chapter 2); (b) increased summer precipitation (Chapter 3); and (c) increasednutrient availability at the permafrost thaw front (Chapter 5). Moreover, the amount of plant-available nitrogen (N) that can be released from thawing permafrost into these peatlands in thenear-future was quantified (Chapter 4). All experiments were performed on Sphagnum fuscum-dominated permafrost peatlands the Abisko area, northern Sweden. The increased summerprecipitation experiment (Chapter 3) was complemented by a sister-experiment in the KytalykReserve in ... Doctoral or Postdoctoral Thesis Abisko Northern Sweden permafrost Institut National de la Recherche Agronomique: ProdINRA Abisko ENVELOPE(18.829,18.829,68.349,68.349) |