Soil warming duration and magnitude affect the dynamics of fine roots and rhizomes and associated C and N pools in subarctic grasslands
Abstract: Background and Aims The response of subarctic grassland's below-ground to soil warming is key to understanding this ecosystem's adaptation to future climate. Functionally different below-ground plant organs can respond differently to changes in soil temperature (T-s). We aimed to...
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ftunivantwerpen:c:irua:204782 2024-04-28T08:39:57+00:00 Soil warming duration and magnitude affect the dynamics of fine roots and rhizomes and associated C and N pools in subarctic grasslands Bhattarai, Biplabi Sigurdsson, Bjarni D. Sigurdsson, Pall Leblans, Niki Janssens, Ivan Meynzer, Wendelien Devarajan, Arun Kumar Truu, Jaak Truu, Marika Ostonen, Ivika 2023 https://hdl.handle.net/10067/2047820151162165141 eng eng info:eu-repo/grantAgreement/EC/h2020/813114 info:eu-repo/semantics/altIdentifier/doi/10.1093/AOB/MCAD102 info:eu-repo/semantics/altIdentifier/isi/001186473900004 info:eu-repo/semantics/closedAccess 0305-7364 Annals of botany Biology info:eu-repo/semantics/article 2023 ftunivantwerpen https://doi.org/10.1093/AOB/MCAD102 2024-04-10T00:11:06Z Abstract: Background and Aims The response of subarctic grassland's below-ground to soil warming is key to understanding this ecosystem's adaptation to future climate. Functionally different below-ground plant organs can respond differently to changes in soil temperature (T-s). We aimed to understand the below-ground adaptation mechanisms by analysing the dynamics and chemistry of fine roots and rhizomes in relation to plant community composition and soil chemistry, along with the duration and magnitude of soil warming. Methods We investigated the effects of the duration [medium-term warming (MTW; 11 years) and long-term warming (LTW; > 60 years)] and magnitude (0-8.4 degrees C) of soil warming on below-ground plant biomass (BPB), fine root biomass (FRB) and rhizome biomass (RHB) in geothermally warmed subarctic grasslands. We evaluated the changes in BPB, FRB and RHB and the corresponding carbon (C) and nitrogen (N) pools in the context of ambient, T-s < +2 degrees C and T-s > +2 degrees C scenarios. Key Results BPB decreased exponentially in response to an increase in T-s under MTW, whereas FRB declined under both MTW and LTW. The proportion of rhizomes increased and the C-N ratio in rhizomes decreased under LTW. The C and N pools in BPB in highly warmed plots under MTW were 50 % less than in the ambient plots, whereas under LTW, C and N pools in warmed plots were similar to those in non-warmed plots. Approximately 78 % of the variation in FRB, RHB, and C and N concentration and pools in fine roots and rhizomes was explained by the duration and magnitude of soil warming, soil chemistry, plant community functional composition, and above-ground biomass. Plant's below-ground biomass, chemistry and pools were related to a shift in the grassland's plant community composition - the abundance of ferns increased and BPB decreased towards higher T-s under MTW, while the recovery of below-ground C and N pools under LTW was related to a higher plant diversity. Conclusion Our results indicate that plant ... Article in Journal/Newspaper Subarctic IRUA - Institutional Repository van de Universiteit Antwerpen Annals of Botany 132 2 269 279 |
institution |
Open Polar |
collection |
IRUA - Institutional Repository van de Universiteit Antwerpen |
op_collection_id |
ftunivantwerpen |
language |
English |
topic |
Biology |
spellingShingle |
Biology Bhattarai, Biplabi Sigurdsson, Bjarni D. Sigurdsson, Pall Leblans, Niki Janssens, Ivan Meynzer, Wendelien Devarajan, Arun Kumar Truu, Jaak Truu, Marika Ostonen, Ivika Soil warming duration and magnitude affect the dynamics of fine roots and rhizomes and associated C and N pools in subarctic grasslands |
topic_facet |
Biology |
description |
Abstract: Background and Aims The response of subarctic grassland's below-ground to soil warming is key to understanding this ecosystem's adaptation to future climate. Functionally different below-ground plant organs can respond differently to changes in soil temperature (T-s). We aimed to understand the below-ground adaptation mechanisms by analysing the dynamics and chemistry of fine roots and rhizomes in relation to plant community composition and soil chemistry, along with the duration and magnitude of soil warming. Methods We investigated the effects of the duration [medium-term warming (MTW; 11 years) and long-term warming (LTW; > 60 years)] and magnitude (0-8.4 degrees C) of soil warming on below-ground plant biomass (BPB), fine root biomass (FRB) and rhizome biomass (RHB) in geothermally warmed subarctic grasslands. We evaluated the changes in BPB, FRB and RHB and the corresponding carbon (C) and nitrogen (N) pools in the context of ambient, T-s < +2 degrees C and T-s > +2 degrees C scenarios. Key Results BPB decreased exponentially in response to an increase in T-s under MTW, whereas FRB declined under both MTW and LTW. The proportion of rhizomes increased and the C-N ratio in rhizomes decreased under LTW. The C and N pools in BPB in highly warmed plots under MTW were 50 % less than in the ambient plots, whereas under LTW, C and N pools in warmed plots were similar to those in non-warmed plots. Approximately 78 % of the variation in FRB, RHB, and C and N concentration and pools in fine roots and rhizomes was explained by the duration and magnitude of soil warming, soil chemistry, plant community functional composition, and above-ground biomass. Plant's below-ground biomass, chemistry and pools were related to a shift in the grassland's plant community composition - the abundance of ferns increased and BPB decreased towards higher T-s under MTW, while the recovery of below-ground C and N pools under LTW was related to a higher plant diversity. Conclusion Our results indicate that plant ... |
format |
Article in Journal/Newspaper |
author |
Bhattarai, Biplabi Sigurdsson, Bjarni D. Sigurdsson, Pall Leblans, Niki Janssens, Ivan Meynzer, Wendelien Devarajan, Arun Kumar Truu, Jaak Truu, Marika Ostonen, Ivika |
author_facet |
Bhattarai, Biplabi Sigurdsson, Bjarni D. Sigurdsson, Pall Leblans, Niki Janssens, Ivan Meynzer, Wendelien Devarajan, Arun Kumar Truu, Jaak Truu, Marika Ostonen, Ivika |
author_sort |
Bhattarai, Biplabi |
title |
Soil warming duration and magnitude affect the dynamics of fine roots and rhizomes and associated C and N pools in subarctic grasslands |
title_short |
Soil warming duration and magnitude affect the dynamics of fine roots and rhizomes and associated C and N pools in subarctic grasslands |
title_full |
Soil warming duration and magnitude affect the dynamics of fine roots and rhizomes and associated C and N pools in subarctic grasslands |
title_fullStr |
Soil warming duration and magnitude affect the dynamics of fine roots and rhizomes and associated C and N pools in subarctic grasslands |
title_full_unstemmed |
Soil warming duration and magnitude affect the dynamics of fine roots and rhizomes and associated C and N pools in subarctic grasslands |
title_sort |
soil warming duration and magnitude affect the dynamics of fine roots and rhizomes and associated c and n pools in subarctic grasslands |
publishDate |
2023 |
url |
https://hdl.handle.net/10067/2047820151162165141 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
0305-7364 Annals of botany |
op_relation |
info:eu-repo/grantAgreement/EC/h2020/813114 info:eu-repo/semantics/altIdentifier/doi/10.1093/AOB/MCAD102 info:eu-repo/semantics/altIdentifier/isi/001186473900004 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/AOB/MCAD102 |
container_title |
Annals of Botany |
container_volume |
132 |
container_issue |
2 |
container_start_page |
269 |
op_container_end_page |
279 |
_version_ |
1797570771410747392 |