Species-specific growth and transpiration response to changing environmental conditions in floodplain forest

0558024 - ÚVGZ 2023 RIV NL eng J - Článek v odborném periodiku
Szatniewska, Justyna - Zavadilová, Ina - Nezval, Ondřej - Krejza, Jan - Petrik, Peter - Čater, M. - Stojanović, Marko
Species-specific growth and transpiration response to changing environmental conditions in floodplain forest.
Forest Ecology and Management. Roč. 516, JUL (2022), č. článku 120248. ISSN 0378-1127. E-ISSN 1872-7042
Grant CEP: GA MŠMT(CZ) LM2018123
Institucionální podpora: RVO:86652079
Klíčová slova: sap flow measurements * fraxinus-angustifolia * quercus-robur * norway spruce * carbohydrate reserves * stomatal conductance * fagus-sylvatica * water storage * tree * soil * Sap flow * Stem radial growth * Tree water deficit * Growth-based water use efficiency * Ring-porous species * Drought stress
Obor OECD: Forestry
Impakt faktor: 3.7, rok: 2022
Způsob publikování: Open access
https://www.sciencedirect.com/science/article/pii/S0378112722002420?dgcid=author#!

Recent changes in the floodplain forests of Central Europe, caused mainly by changes in hydrological manage-ment , the increased frequency of droughts due to climate change, have led to severe degradation of floodplain ecosystems. Our main objective was to determine the sensitivity of trees to drought by observing the response of the tree phenology, stem radial growth , physiology (sap flow) of three predominant tree species, namely English oak, narrow-leaved ash, and common hornbeam, to the environmental variables (climate). Stem radial growth began before bud break in ring-porous oak and ash, whereas in diffuse-porous hornbeam, growth onset occurred after leaf formation. The early onset with intense growth during favorable months (April-May) observed in ring-porous species was a major prerequisite for the successful growth of oak and ash at this site. Tree water deficit (TWD), an indicator of stem hydration, was triggered by decreasing soil moisture in all species, and was most prominent in ash, followed by oak. Intriguingly, sap flow was decoupled from TWD in all species and was driven primarily by evaporative demand from the atmosphere. Oak was the least conservative in regulating sap flow under atmospheric drought followed by hornbeam, whereas ash was most restricted and reduced its transpiration during dry periods. In contrast, ash was characterized by the highest radial growth and growthbased water-use efficiency. The lower water storage capacity of oak and ash is likely compensated by deep rooting and drought avoidance strategies, respectively. Tree species that tend to use surface soil water could be severely limited by more extractive species such as hornbeam. Despite the contrasting leaf and wood phenology, stomatal control, and rooting depth among the studied floodplain tree species, they exhibited analogous sap flow and water storage dynamics responses to drier conditions that enabled them to co-exist in the South Moravian Region. Nevertheless, our results suggest that the severe droughts and human-induced alterations in groundwater pose serious threats to floodplain forests in Central Europe, with certain tree species being unable to adapt to these altered conditions.
Trvalý link: http://hdl.handle.net/11104/0331868