Chemical signature in xylem cell wall of Salix glauca L. due to Eurois occulta L. outbreaks
Insects driven defoliations are one of the major natural disturbances in high-latitude ecosystems and are expected to increase in frequency and severity due to global climate change. Defoliations cause severe reductions in biomass and carbon investments that affect the functioning and productivity o...
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ftunivpadovairis:oai:www.research.unipd.it:11577/3303821 2024-04-14T08:12:33+00:00 Chemical signature in xylem cell wall of Salix glauca L. due to Eurois occulta L. outbreaks Angela Luisa Prendin Marco Carrer Nanna Bjerregaard Pedersen Mario Pividori Jørgen Hollesen Signe Normand Lisbeth Garbrecht Thygesen Prendin, ANGELA LUISA Carrer, Marco Bjerregaard Pedersen, Nanna Pividori, Mario Hollesen, Jørgen Normand, Signe Garbrecht Thygesen, Lisbeth 2019 http://hdl.handle.net/11577/3303821 eng eng ispartofbook:Book of abstract TRACE 2019 TREE RINGS IN ARCHAEOLOGY, CLIMATOLOGY AND ECOLOGY (TRACE 2019) http://hdl.handle.net/11577/3303821 info:eu-repo/semantics/conferenceObject 2019 ftunivpadovairis 2024-03-21T19:35:44Z Insects driven defoliations are one of the major natural disturbances in high-latitude ecosystems and are expected to increase in frequency and severity due to global climate change. Defoliations cause severe reductions in biomass and carbon investments that affect the functioning and productivity of tundra ecosystems. Recent studies have quantified the decrease in cell-wall thickness (CWT) during the outbreak and the unexpected increase in primary production the following years. Here we combine dendro-anatomical analysis with chemical imaging to investigate how the outbreaks affect carbon assimilation and vegetation productivity. Samples of Salix glauca L. featuring outbreak events of the moth Eurois occulta L. were collected at Iffiarterfik, Western Greenland. Samples were cross-dated and two pointer years in 2003 and 2010 (outbreaks) identified. These two annual rings showed a clear reduction in carbon investment such as reduction in ring-width, CWT but also colour intensity was affected, suggesting an altered biopolymer mark-up. For each outbreak event, seven growth rings were analysed (outbreak ±3years). The wider rings formed the two following years highlighted a growth release after the outbreaks. The chemical composition of the xylem cell wall material was analysed using confocal Raman imaging on cross sections of fibres, vessels, and parenchyma cells to possibly identify the chemical signatures related to insect outbreaks. Possible differences in chemical composition between cell types and between growth years were explored using chemical imaging based on cluster analysis of integrated Raman band intensities as well as by more advanced chemometric approaches. Conference Object Greenland Tundra Padua Research Archive (IRIS - Università degli Studi di Padova) Greenland |
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Open Polar |
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Padua Research Archive (IRIS - Università degli Studi di Padova) |
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ftunivpadovairis |
language |
English |
description |
Insects driven defoliations are one of the major natural disturbances in high-latitude ecosystems and are expected to increase in frequency and severity due to global climate change. Defoliations cause severe reductions in biomass and carbon investments that affect the functioning and productivity of tundra ecosystems. Recent studies have quantified the decrease in cell-wall thickness (CWT) during the outbreak and the unexpected increase in primary production the following years. Here we combine dendro-anatomical analysis with chemical imaging to investigate how the outbreaks affect carbon assimilation and vegetation productivity. Samples of Salix glauca L. featuring outbreak events of the moth Eurois occulta L. were collected at Iffiarterfik, Western Greenland. Samples were cross-dated and two pointer years in 2003 and 2010 (outbreaks) identified. These two annual rings showed a clear reduction in carbon investment such as reduction in ring-width, CWT but also colour intensity was affected, suggesting an altered biopolymer mark-up. For each outbreak event, seven growth rings were analysed (outbreak ±3years). The wider rings formed the two following years highlighted a growth release after the outbreaks. The chemical composition of the xylem cell wall material was analysed using confocal Raman imaging on cross sections of fibres, vessels, and parenchyma cells to possibly identify the chemical signatures related to insect outbreaks. Possible differences in chemical composition between cell types and between growth years were explored using chemical imaging based on cluster analysis of integrated Raman band intensities as well as by more advanced chemometric approaches. |
author2 |
Prendin, ANGELA LUISA Carrer, Marco Bjerregaard Pedersen, Nanna Pividori, Mario Hollesen, Jørgen Normand, Signe Garbrecht Thygesen, Lisbeth |
format |
Conference Object |
author |
Angela Luisa Prendin Marco Carrer Nanna Bjerregaard Pedersen Mario Pividori Jørgen Hollesen Signe Normand Lisbeth Garbrecht Thygesen |
spellingShingle |
Angela Luisa Prendin Marco Carrer Nanna Bjerregaard Pedersen Mario Pividori Jørgen Hollesen Signe Normand Lisbeth Garbrecht Thygesen Chemical signature in xylem cell wall of Salix glauca L. due to Eurois occulta L. outbreaks |
author_facet |
Angela Luisa Prendin Marco Carrer Nanna Bjerregaard Pedersen Mario Pividori Jørgen Hollesen Signe Normand Lisbeth Garbrecht Thygesen |
author_sort |
Angela Luisa Prendin |
title |
Chemical signature in xylem cell wall of Salix glauca L. due to Eurois occulta L. outbreaks |
title_short |
Chemical signature in xylem cell wall of Salix glauca L. due to Eurois occulta L. outbreaks |
title_full |
Chemical signature in xylem cell wall of Salix glauca L. due to Eurois occulta L. outbreaks |
title_fullStr |
Chemical signature in xylem cell wall of Salix glauca L. due to Eurois occulta L. outbreaks |
title_full_unstemmed |
Chemical signature in xylem cell wall of Salix glauca L. due to Eurois occulta L. outbreaks |
title_sort |
chemical signature in xylem cell wall of salix glauca l. due to eurois occulta l. outbreaks |
publishDate |
2019 |
url |
http://hdl.handle.net/11577/3303821 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Tundra |
genre_facet |
Greenland Tundra |
op_relation |
ispartofbook:Book of abstract TRACE 2019 TREE RINGS IN ARCHAEOLOGY, CLIMATOLOGY AND ECOLOGY (TRACE 2019) http://hdl.handle.net/11577/3303821 |
_version_ |
1796310380396412928 |