Environmental control and intersite variations of phenolics in Betula nana in tundra ecosystems
• Secondary metabolites make leaves unpalatable for herbivores and influence decomposition. Site-specific differences are presented in phenolics and nitrogen in Betula nana leaves from dwarf shrub tundra at Abisko, northern Sweden, and from tussock tundra at Toolik Lake, Alaska, subjected to a decad...
Published in: | New Phytologist |
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Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2001
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Online Access: | https://curis.ku.dk/portal/da/publications/environmental-control-and-intersite-variations-of-phenolics-in-betula-nana-in-tundra-ecosystems(89561730-098c-4a34-8771-a96d343e2525).html https://doi.org/10.1046/j.1469-8137.2001.00149.x http://www.scopus.com/inward/record.url?scp=0034936952&partnerID=8YFLogxK |
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ftcopenhagenunip:oai:pure.atira.dk:publications/89561730-098c-4a34-8771-a96d343e2525 2023-12-03T10:08:13+01:00 Environmental control and intersite variations of phenolics in Betula nana in tundra ecosystems Graglia, Enrico Julkunen-Tiitto, Riitta Shaver, Gaius R. Schmidt, Inger K. Jonasson, Sven Michelsen, Anders 2001-07-19 https://curis.ku.dk/portal/da/publications/environmental-control-and-intersite-variations-of-phenolics-in-betula-nana-in-tundra-ecosystems(89561730-098c-4a34-8771-a96d343e2525).html https://doi.org/10.1046/j.1469-8137.2001.00149.x http://www.scopus.com/inward/record.url?scp=0034936952&partnerID=8YFLogxK eng eng info:eu-repo/semantics/closedAccess Graglia , E , Julkunen-Tiitto , R , Shaver , G R , Schmidt , I K , Jonasson , S & Michelsen , A 2001 , ' Environmental control and intersite variations of phenolics in Betula nana in tundra ecosystems ' , New Phytologist , vol. 151 , no. 1 , pp. 227-236 . https://doi.org/10.1046/j.1469-8137.2001.00149.x Arctic-alpine ecosystems Betula nana (dwarf birch) Climate change experiments Fertilization Secondary metabolites Shading Tannin Warming article 2001 ftcopenhagenunip https://doi.org/10.1046/j.1469-8137.2001.00149.x 2023-11-09T00:03:04Z • Secondary metabolites make leaves unpalatable for herbivores and influence decomposition. Site-specific differences are presented in phenolics and nitrogen in Betula nana leaves from dwarf shrub tundra at Abisko, northern Sweden, and from tussock tundra at Toolik Lake, Alaska, subjected to a decade of warming, fertilization and shading. • Nitrogen and a number of phenolics, including condensed and hydrolysable tannins, flavonoids, phenolic glucosides and chlorogenic acids, were analysed in B. nana leaves. • Phenolic concentrations showed marked between-site differences (e.g. condensed tannins were 50% higher at Abisko than at Toolik); responses to the environmental manipulations were more pronounced at Toolik compared with Abisko. Warming increased condensed tannins and decreased hydrolysable tannins at Toolik, but had no effect at Abisko, whereas fertilization and shading generally decreased concentrations. • Betula invests less carbon in phenolics at Toolik than at Abisko and shows a greater response to environmental changes by investing more carbon in growth and less to phenolic production. Hence, the Toolik population has a lower herbivore-defense level, which declines further if nutrient availability increases. By contrast, under warmer conditions, the increase in bulk phenolics and decrease in leaf palatability are greater at Toolik than at Abisko. Article in Journal/Newspaper Abisko Arctic Betula nana Climate change Dwarf birch Northern Sweden Tundra Alaska University of Copenhagen: Research Arctic Abisko ENVELOPE(18.829,18.829,68.349,68.349) New Phytologist 151 1 227 236 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
Arctic-alpine ecosystems Betula nana (dwarf birch) Climate change experiments Fertilization Secondary metabolites Shading Tannin Warming |
spellingShingle |
Arctic-alpine ecosystems Betula nana (dwarf birch) Climate change experiments Fertilization Secondary metabolites Shading Tannin Warming Graglia, Enrico Julkunen-Tiitto, Riitta Shaver, Gaius R. Schmidt, Inger K. Jonasson, Sven Michelsen, Anders Environmental control and intersite variations of phenolics in Betula nana in tundra ecosystems |
topic_facet |
Arctic-alpine ecosystems Betula nana (dwarf birch) Climate change experiments Fertilization Secondary metabolites Shading Tannin Warming |
description |
• Secondary metabolites make leaves unpalatable for herbivores and influence decomposition. Site-specific differences are presented in phenolics and nitrogen in Betula nana leaves from dwarf shrub tundra at Abisko, northern Sweden, and from tussock tundra at Toolik Lake, Alaska, subjected to a decade of warming, fertilization and shading. • Nitrogen and a number of phenolics, including condensed and hydrolysable tannins, flavonoids, phenolic glucosides and chlorogenic acids, were analysed in B. nana leaves. • Phenolic concentrations showed marked between-site differences (e.g. condensed tannins were 50% higher at Abisko than at Toolik); responses to the environmental manipulations were more pronounced at Toolik compared with Abisko. Warming increased condensed tannins and decreased hydrolysable tannins at Toolik, but had no effect at Abisko, whereas fertilization and shading generally decreased concentrations. • Betula invests less carbon in phenolics at Toolik than at Abisko and shows a greater response to environmental changes by investing more carbon in growth and less to phenolic production. Hence, the Toolik population has a lower herbivore-defense level, which declines further if nutrient availability increases. By contrast, under warmer conditions, the increase in bulk phenolics and decrease in leaf palatability are greater at Toolik than at Abisko. |
format |
Article in Journal/Newspaper |
author |
Graglia, Enrico Julkunen-Tiitto, Riitta Shaver, Gaius R. Schmidt, Inger K. Jonasson, Sven Michelsen, Anders |
author_facet |
Graglia, Enrico Julkunen-Tiitto, Riitta Shaver, Gaius R. Schmidt, Inger K. Jonasson, Sven Michelsen, Anders |
author_sort |
Graglia, Enrico |
title |
Environmental control and intersite variations of phenolics in Betula nana in tundra ecosystems |
title_short |
Environmental control and intersite variations of phenolics in Betula nana in tundra ecosystems |
title_full |
Environmental control and intersite variations of phenolics in Betula nana in tundra ecosystems |
title_fullStr |
Environmental control and intersite variations of phenolics in Betula nana in tundra ecosystems |
title_full_unstemmed |
Environmental control and intersite variations of phenolics in Betula nana in tundra ecosystems |
title_sort |
environmental control and intersite variations of phenolics in betula nana in tundra ecosystems |
publishDate |
2001 |
url |
https://curis.ku.dk/portal/da/publications/environmental-control-and-intersite-variations-of-phenolics-in-betula-nana-in-tundra-ecosystems(89561730-098c-4a34-8771-a96d343e2525).html https://doi.org/10.1046/j.1469-8137.2001.00149.x http://www.scopus.com/inward/record.url?scp=0034936952&partnerID=8YFLogxK |
long_lat |
ENVELOPE(18.829,18.829,68.349,68.349) |
geographic |
Arctic Abisko |
geographic_facet |
Arctic Abisko |
genre |
Abisko Arctic Betula nana Climate change Dwarf birch Northern Sweden Tundra Alaska |
genre_facet |
Abisko Arctic Betula nana Climate change Dwarf birch Northern Sweden Tundra Alaska |
op_source |
Graglia , E , Julkunen-Tiitto , R , Shaver , G R , Schmidt , I K , Jonasson , S & Michelsen , A 2001 , ' Environmental control and intersite variations of phenolics in Betula nana in tundra ecosystems ' , New Phytologist , vol. 151 , no. 1 , pp. 227-236 . https://doi.org/10.1046/j.1469-8137.2001.00149.x |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1046/j.1469-8137.2001.00149.x |
container_title |
New Phytologist |
container_volume |
151 |
container_issue |
1 |
container_start_page |
227 |
op_container_end_page |
236 |
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1784259490174992384 |