Seasonal variability of leaf area index and foliar nitrogen in contrasting dry-mesic tundras
Udgivelsesdato: May 2009 Assimilation and exchange of carbon for arctic ecosystems depend strongly on leaf area index (LAI) and total foliar nitrogen (TFN). For dry-mesic tundras, the seasonality of these characteristics is unexplored. We addressed this knowledge gap by measuring variations of LAI a...
Published in: | Botany |
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Online Access: | https://curis.ku.dk/portal/da/publications/seasonal-variability-of-leaf-area-index-and-foliar-nitrogen-in-contrasting-drymesic-tundras(730444f0-0320-11de-b05e-000ea68e967b).html https://doi.org/10.1139/B09-016 |
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ftcopenhagenunip:oai:pure.atira.dk:publications/730444f0-0320-11de-b05e-000ea68e967b 2023-05-15T14:57:09+02:00 Seasonal variability of leaf area index and foliar nitrogen in contrasting dry-mesic tundras Campioli, Matteo Michelsen, Anders Lemeur, Raoul Samson, Roeland 2009 https://curis.ku.dk/portal/da/publications/seasonal-variability-of-leaf-area-index-and-foliar-nitrogen-in-contrasting-drymesic-tundras(730444f0-0320-11de-b05e-000ea68e967b).html https://doi.org/10.1139/B09-016 eng eng info:eu-repo/semantics/restrictedAccess Campioli , M , Michelsen , A , Lemeur , R & Samson , R 2009 , ' Seasonal variability of leaf area index and foliar nitrogen in contrasting dry-mesic tundras ' , Botany , vol. 87 , no. 5 , pp. 431-442 . https://doi.org/10.1139/B09-016 /dk/atira/pure/core/keywords/TheFacultyOfScience Faculty of Science planter økologi næringsstofkredsløb arktis tundra plants ecology nutrient cycling arctic article 2009 ftcopenhagenunip https://doi.org/10.1139/B09-016 2022-02-24T00:01:21Z Udgivelsesdato: May 2009 Assimilation and exchange of carbon for arctic ecosystems depend strongly on leaf area index (LAI) and total foliar nitrogen (TFN). For dry-mesic tundras, the seasonality of these characteristics is unexplored. We addressed this knowledge gap by measuring variations of LAI and TFN at five contrasting subarctic heaths during the growing season 2007, from about 2 weeks after bud burst until about 2 weeks before senescence. The communities generally showed an early season LAI and TFN increase, owing to leaf development of deciduous shrubs, and limited variations later on, owing to concurrent leaf growth and mortality of evergreen shrubs. For most of the communities, the TFN:LAI ratio was constant along the entire sampling period, indicating that leaf growth and mortality, triggers for both LAI and TFN, are more important than leaf N retranslocation, which only affects TFN. A constant TFN:LAI ratio facilitates the determination of TFN from LAI, which is easier to measure or simulate. However, a sheltered community showed an increment in the LAI of the deciduous canopy in mid-late season, paralleled by a decreased TFN:LAI ratio. Article in Journal/Newspaper Arctic Arktis Arktis* Subarctic Tundra University of Copenhagen: Research Arctic Botany 87 5 431 442 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
/dk/atira/pure/core/keywords/TheFacultyOfScience Faculty of Science planter økologi næringsstofkredsløb arktis tundra plants ecology nutrient cycling arctic |
spellingShingle |
/dk/atira/pure/core/keywords/TheFacultyOfScience Faculty of Science planter økologi næringsstofkredsløb arktis tundra plants ecology nutrient cycling arctic Campioli, Matteo Michelsen, Anders Lemeur, Raoul Samson, Roeland Seasonal variability of leaf area index and foliar nitrogen in contrasting dry-mesic tundras |
topic_facet |
/dk/atira/pure/core/keywords/TheFacultyOfScience Faculty of Science planter økologi næringsstofkredsløb arktis tundra plants ecology nutrient cycling arctic |
description |
Udgivelsesdato: May 2009 Assimilation and exchange of carbon for arctic ecosystems depend strongly on leaf area index (LAI) and total foliar nitrogen (TFN). For dry-mesic tundras, the seasonality of these characteristics is unexplored. We addressed this knowledge gap by measuring variations of LAI and TFN at five contrasting subarctic heaths during the growing season 2007, from about 2 weeks after bud burst until about 2 weeks before senescence. The communities generally showed an early season LAI and TFN increase, owing to leaf development of deciduous shrubs, and limited variations later on, owing to concurrent leaf growth and mortality of evergreen shrubs. For most of the communities, the TFN:LAI ratio was constant along the entire sampling period, indicating that leaf growth and mortality, triggers for both LAI and TFN, are more important than leaf N retranslocation, which only affects TFN. A constant TFN:LAI ratio facilitates the determination of TFN from LAI, which is easier to measure or simulate. However, a sheltered community showed an increment in the LAI of the deciduous canopy in mid-late season, paralleled by a decreased TFN:LAI ratio. |
format |
Article in Journal/Newspaper |
author |
Campioli, Matteo Michelsen, Anders Lemeur, Raoul Samson, Roeland |
author_facet |
Campioli, Matteo Michelsen, Anders Lemeur, Raoul Samson, Roeland |
author_sort |
Campioli, Matteo |
title |
Seasonal variability of leaf area index and foliar nitrogen in contrasting dry-mesic tundras |
title_short |
Seasonal variability of leaf area index and foliar nitrogen in contrasting dry-mesic tundras |
title_full |
Seasonal variability of leaf area index and foliar nitrogen in contrasting dry-mesic tundras |
title_fullStr |
Seasonal variability of leaf area index and foliar nitrogen in contrasting dry-mesic tundras |
title_full_unstemmed |
Seasonal variability of leaf area index and foliar nitrogen in contrasting dry-mesic tundras |
title_sort |
seasonal variability of leaf area index and foliar nitrogen in contrasting dry-mesic tundras |
publishDate |
2009 |
url |
https://curis.ku.dk/portal/da/publications/seasonal-variability-of-leaf-area-index-and-foliar-nitrogen-in-contrasting-drymesic-tundras(730444f0-0320-11de-b05e-000ea68e967b).html https://doi.org/10.1139/B09-016 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arktis Arktis* Subarctic Tundra |
genre_facet |
Arctic Arktis Arktis* Subarctic Tundra |
op_source |
Campioli , M , Michelsen , A , Lemeur , R & Samson , R 2009 , ' Seasonal variability of leaf area index and foliar nitrogen in contrasting dry-mesic tundras ' , Botany , vol. 87 , no. 5 , pp. 431-442 . https://doi.org/10.1139/B09-016 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1139/B09-016 |
container_title |
Botany |
container_volume |
87 |
container_issue |
5 |
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431 |
op_container_end_page |
442 |
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1766329242646216704 |