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Warming does not delay the start of autumnal leaf coloration but slows its progress rate
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SYSNO ASEP 0562750 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Warming does not delay the start of autumnal leaf coloration but slows its progress rate Author(s) Jiang, N. (CN)
Shen, M. (CN)
Ciais, P. (FR)
Campioli, M. (DK)
Penuelas, J. (ES)
Korner, Ch. (CH)
Cao, R. (CN)
Piao, S. (CN)
Liu, L. (CN)
Wang, S. (CN)
Liang, E. (CN)
Delpierre, N. (FR)
Soudani, K. (FR)
Rao, Y. (US)
Montagnani, L. (IT)
Hörtnagl, L. (CH)
Paul-Limoges, E. (CH)
Myneni, R. (US)
Wohlfahrt, G. (AT)
Fu, Y. (CN)
Šigut, Ladislav (UEK-B) RID, ORCID, SAI
Varlagin, A. (RU)
Chen, J. (CN)
Tang, Y. (CN)
Zhao, W. (CN)Source Title Global Ecology and Biogeography - ISSN 1466-822X
Roč. 31, č. 11 (2022), s. 2297-2313Number of pages 16 s. Language eng - English Country GB - United Kingdom Keywords autumnal leaf senescence ; global warming ; leaf coloration onset ; Northern Hemisphere ; photoperiod Subject RIV DG - Athmosphere Sciences, Meteorology OECD category Meteorology and atmospheric sciences R&D Projects LM2015061 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_019/0000797 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UEK-B - RVO:86652079 UT WOS 000840376600001 EID SCOPUS 85135817629 DOI 10.1111/geb.13581 Annotation Aim Initiation of autumnal leaf senescence is crucial for plant overwintering and ecosystem dynamics. Previous studies have focused on the advanced stages of autumnal leaf senescence and reported that climatic warming delayed senescence, despite the fundamental differences among the stages of senescence. However, the timing of onset of leaf coloration (D-LCO), the earliest visual sign of senescence, has rarely been studied. Here, we assessed the response of D-LCO to temperature. Location 30-75 degrees N in the Northern Hemisphere. Time period 2000-2018. Major taxa studied Deciduous vegetation. Methods We retrieved D-LCO from high-temporal-resolution satellite data, which were then validated by PhenoCam observations. We investigated the temporal changes in D-LCO and the relationship between D-LCO and temperature by using satellite and ground observations. Results D-LCO was not significantly (p > .05) delayed between 2000 and 2018 in 94% of the area. D-LCO was positively (p < .05) correlated with pre-D-LCO mean daily minimum temperature (T-min) in only 9% of the area, whereas the end of leaf coloration (D-LCE) was positively correlated with pre-D-LCE mean T-min over a larger area (34%). Further analyses showed that warming slowed the progress of leaf coloration. Interestingly, D-LCO was less responsive to pre-D-LCO mean T-min in areas where daylength was longer across the Northern Hemisphere, particularly for woody vegetation. Main conclusions The rate of progress of coloration is more sensitive to temperature than its start date, resulting in an extension of the duration of leaf senescence under warming. The dependence of D-LCO response to temperature on daylength indicates stronger photoperiodic control on initiation of leaf senescence in areas with longer daylength (i.e., shorter nights), possibly because plants respond to the length of uninterrupted darkness rather than daylength. This study indicates that the onset of leaf coloration was not responsive to climate warming and provides observational evidence of photoperiod control of autumnal leaf senescence at biome and continental scales. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2023 Electronic address https://onlinelibrary.wiley.com/doi/10.1111/geb.13581
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