| Title: | Autumn phenology of mountain birch at the sub-arctic treeline in comparison with silver birch in the cold and mild temperate zone |
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| Authors: | ID Zuccarini, Paolo (Author)
ID Gehrmann, Friederike (Author)
ID Balzarolo, Manuela (Author)
ID Flores, Omar (Author)
ID Gričar, Jožica (Author)
ID Mariën, Bertold (Author)
ID Campioli, Matteo (Author) |
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| Files: |  URL - Source URL, visit https://link.springer.com/article/10.1007/s00468-024-02587-6
 PDF - Presentation file, download (2,31 MB)
MD5: A34641D47A587B8EB39C0BA969E3930D
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  SciVie - Slovenian Forestry Institute
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| Abstract: | Lack of knowledge on autumn phenology of deciduous trees still exists for high-latitude regions. We studied the leaf and wood growth autumn phenology of mountain birch in a sub-arctic climate (northern Sweden) and compared them with the same dynamics for silver birch in a temperate climate (southern Norway and Belgium). The first autumn phenophase for mountain birch was the decline of the remotely sensed Terrestrial Chlorophyll Index (TCI) at the end of July. This was followed by wood growth cessation, onset of chlorophyll degradation and of loss of canopy greenness, and the latter accompanied by onset of anthocyanin production and flavonoids degradation. The earlier timing of TCI decline than chlorophyll degradation was probably due to the different scales of measurements (ecosystem level vs. tree leaves, respectively). In 2020, the decline in canopy greenness started in the same period at the three studied sites, showing an unexpected early timing for Belgium, likely due to the very warm late summer conditions and drought stress or intraseasonal legacy effects. Accordingly, wood growth cessation also occurred unexpectedly earlier in Belgium than in Norway. The end of senescence was inversely related to latitude. Our study presents, for the first time, the autumn timeline of a deciduous species at the northern treeline, and indicates that the timing of autumn phenology of birch populations does not consistently follow the latitudinal gradient but varies according to the phenophase, the scale of measurements and the current year meteorological conditions. |
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| Keywords: | Betula pendula, Betula pubescens, deciduous trees, leaf senescence, terrestrial chlorophyll index, wood phenology |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 01.01.2025 |
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| Year of publishing: | 2025 |
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| Number of pages: | str. 1-13 |
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| Numbering: | Vol. 39, art. no. ǂ14 |
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| PID: | 20.500.12556/DiRROS-21087  |
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| UDC: | 630*81:630*18 |
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| ISSN on article: | 1432-2285 |
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| DOI: | 10.1007/s00468-024-02587-6 |
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| COBISS.SI-ID: | 219860483 |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 19. 12. 2024;
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| Publication date in DiRROS: | 19.12.2024 |
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| Views: | 36 |
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| Downloads: | 15 |
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