Multi-Year Monitoring of Deciduous Forests Ecophysiology and the Role of Temperature and Precipitation as Controlling Factors

Stagakis, Stavros and Markos, Nikos and Vanikiotis, Theofilos and Levizou, Efi and Kyparissis, Aris. (2022) Multi-Year Monitoring of Deciduous Forests Ecophysiology and the Role of Temperature and Precipitation as Controlling Factors. PLANTS-BASEL, 11 (17). ARTN 2257.

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Official URL: https://edoc.unibas.ch/91516/

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Two deciduous forest ecosystems, one dominated by Fagus sylvatica and a mixed one with Ouercus cerris and Ouercus frainetto, were monitored from an ecophysiological perspective during a five-year period, in order to assess seasonal fluctuations, establish links between phenology and ecophysiology, and reveal climatic controls. Field measurements of leaf area index (LAI), chlorophyll content, leaf specific mass (LSM), water potential (Psi) and leaf photosynthesis (Aleaf) were performed approximately on a monthly basis. LAI, chlorophylls and LSM fluctuations followed a recurrent pattern yearly, with increasing values during spring leaf burst and expansion, relatively stable values during summer and decreasing values during autumn senescence. However, pre-senescence leaf fall and chlorophyll reductions were evident in the driest year. The dynamically responsive Aleaf and 1 Psi presented considerable inter-annual variation. Both oak species showed more pronounced depressions of Aleaf and 1 Psi compared to beech, yet the time-point of their appearance coincided and was the same for all species each year. Spring temperature had a positive role in the increasing phase of all ecophysiological processes while rising autumn temperature resulted in retarded senescence. Precipitation showed asymmetric effects on the measured ecophysiological parameters. The betweenspecies differences in responses, climate sensitivity and climate memory are identified and discussed.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften > Atmospheric Sciences (Kalberer)
UniBasel Contributors:Stagakis, Stavros
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:12 Jan 2023 08:39
Deposited On:12 Jan 2023 08:39

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