Marko Stojanović

Czech Academy of Sciences, Global Change Research Institute

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Justyna Szatniewska

Czech Academy of Sciences, Global Change Research Institute

Jan Krejza

Czech Academy of Sciences, Global Change Research Institute

Jordi Martínez‐Vilalta

Universitat Autònoma de Barcelona

Roman Zweifel

Swiss Federal Institute for Forest, Snow and Landscape Research

Walter Oberhuber

Universität Innsbruck

Roberto L. Salomón

Ghent University

Kathy Steppe

Ghent University

Patrick Fonti

Swiss Federal Institute for Forest, Snow and Landscape Research

Rafael Poyatos

Centre for Research on Ecology and Forestry Applications

Nikolaus Obojes

Eurac Research

Cooperative Institutions

Technical University of Munich

Mendel University in Brno

Czech Academy of Sciences, Global Change Research Institute

Swiss Federal Institute for Forest, Snow and Landscape Research

ETH Zurich

Czech University of Life Sciences Prague

Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement

University of Ljubljana

Slovenian Forestry Institute

Brno University of Technology

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Oak sprouts grow better than seedlings under drought stress

iForest - Biogeosciences and Forestry (2016)

J Pietras Marko Stojanović Robert Knott Radek Pokorný

This study focused on the comparison of two contrasting forest regeneration types and their susceptibility to drought stress. Transpiration and biomass production were studied on young sessile oak trees Quercus petraea (Matt.) Liebl. regenerated as sprouts and seedlings, and grown in a coppice experimental site in the Czech Republic. Biomass production was estimated using destructive methods, while transpiration was derived from sap flow measurements and assessed according to the plant biometry and microclimatic conditions. Sprouts were characterized by a significantly higher diameter, height, leaf area and above-ground biomass and by a lower wood density as compared with seedlings of the same age. Moreover, the sap flow of sprouts was higher than that of seedlings, which was explained by the plant dimension. Transpiration, expressed as sap flow scaled to plant leaf area, did not differ between seedlings and sprouts when soil water was not limiting. However, during drought periods, when soil water potential dropped below -1.4 MPa, sprouts transpired significantly more than seedlings. Our results confirm that sprouts have access to a larger water pool via the old stump root system and are able to draw more water under drought. Moreover, sprouts seemed to be less susceptible to water limitations than seedlings of similar age. Less influence of drought on sprouts may partially explain their higher above-ground biomass production. Based on our results, coppice could be an appropriate management system to be adopted in sites characterized by frequent or extreme drought periods.

Quercus petraea

Drought stress

10.3832/ifor1823-009

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Citations (30)

Pedunculate oak is more resistant to drought and extreme events than narrow-leaved ash in Central European floodplain forests

Forest Ecology and Management (2024)

Soham Basu Marko Stojanović Jernej Jevšenak Allan Buras J. Kulhavý

Oak forest

10.1016/j.foreco.2024.121907

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Citations (3)

APPLICATION OF MODERN VEGETATION MODELING METHODS ON A TOPOGRAPHIC MAP OF SCALE 1:25 000

Conference proceedings (2024)

Marko Stojanović Nenad Galjak SRĐAN STOJAKOVIĆ Siniša Drobnjak

10.24867/symopis-2024-51-014

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Sap flow and growth response of Norway spruce under long-term partial rainfall exclusion at low altitude

Frontiers in Plant Science (2023)

Ina Zavadilová Justyna Szatniewska Peter Petrík Ö. Mauer Radek Pokorný

Under ongoing climate change, more frequent and severe drought periods accompanied by heat waves are expected in the future. Under these conditions, the tree's survival is conditioned by fast recovery of functions after drought release. Therefore, in the presented study, we evaluated the effect of long-term water reduction in soil on tree water use and growth dynamics of Norway spruce.The experiment was conducted in two young Norway spruce plots located on suboptimal sites at a low altitude of 440 m a.s.l. In the first plot (PE), 25% of precipitation throughfall was excluded since 2007, and the second one represented the control treatment with ambient conditions (PC). Tree sap flow, stem radial increment, and tree water deficit were monitored in two consecutive growing seasons: 2015-2016, with contrasting hydro-climatic conditions.Trees in both treatments showed relatively isohydric behavior reflected in a strong reduction of sap flow under the exceptional drought of 2015. Nevertheless, trees from PE treatment reduced sap flow faster than PC under decreasing soil water potential, exhibiting faster stomatal response. This led to a significantly lower sap flow of PE, compared to PC in 2015. The maximal sap flow rates were also lower for PE treatment, compared to PC. Both treatments experienced minimal radial growth during the 2015 drought and subsequent recovery of radial growth under the more the humid year of 2016. However, treatments did not differ significantly in stem radial increments within respective years.Precipitation exclusion treatment, therefore, led to water loss adjustment, but did not affect growth response to intense drought and growth recovery in the year after drought.

Growing season

10.3389/fpls.2023.1089706

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Networking the forest infrastructure towards near real-time monitoring – A white paper

The Science of The Total Environment (2023)

Roman Zweifel Christoforos Pappas Richard L. Peters Flurin Babst Daniel Balanzategui

10.1016/j.scitotenv.2023.162167

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Operationalising ecological resilience

Ron Corstanje Nikolaos Toumasis Marko Stojanović Daniel M. Simms J. Arthur Harris

Given the increasing pressures and perturbations on ecosystem due to climatic variability, there has been a developing interest in determining the resilience of ecosystems, particularly given the potential of abrupt and possibly irreversible shifts between alternative ecosystem states. There are numerous conceptual definitions of resilience in environmental systems and, even when resilience is clearly described for a particular ecosystem, it can challenging to quantify a priori to a state change in the ecosystem of interest. Ecosystems that approach transition exhibit generic changes in dynamical behaviour that can be used to signal the approach of a critical transition. When an ecosystem approaches a critical transition, its dynamics “slowdown”, and start exhibiting properties associated to the process critical slowing down (CSD), such as increased recovery time, variance, and autocorrelation. Here we develop a set of analytical methods based on measures of variance and autocorrelation to determine the current state of ecosystem and their likelihood to be at CSD, so to demonstrate how to operationalise what to date has been developed as a theoretical framework. We use wavelets as a measure of identifying changes in the variance term, and autocorrelation was modelled using an Bayesian dynamic linear model. We illustrate this on three case studies; i) on an experimental soil system subjected to dry wet cycles; ii) on an intensely managed ecological system in the Everglades and iii) on extensively managed grassland systems in the UK. We illustrate that although any of the resilience characteristics can be used to define resilience, the identified properties of a resilient response must be described for different contexts.

Resilience

10.5194/egusphere-egu24-16180

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The 2018 European heatwave led to stem dehydration but not to consistent growth reductions in forests

Nature Communications (2022)

Roberto L. Salomón Richard L. Peters Roman Zweifel Ute Sass‐Klaassen Annemiek I. Stegehuis

Abstract Heatwaves exert disproportionately strong and sometimes irreversible impacts on forest ecosystems. These impacts remain poorly understood at the tree and species level and across large spatial scales. Here, we investigate the effects of the record-breaking 2018 European heatwave on tree growth and tree water status using a collection of high-temporal resolution dendrometer data from 21 species across 53 sites. Relative to the two preceding years, annual stem growth was not consistently reduced by the 2018 heatwave but stems experienced twice the temporary shrinkage due to depletion of water reserves. Conifer species were less capable of rehydrating overnight than broadleaves across gradients of soil and atmospheric drought, suggesting less resilience toward transient stress. In particular, Norway spruce and Scots pine experienced extensive stem dehydration. Our high-resolution dendrometer network was suitable to disentangle the effects of a severe heatwave on tree growth and desiccation at large-spatial scales in situ, and provided insights on which species may be more vulnerable to climate extremes.

Scots pine

10.1038/s41467-021-27579-9

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Citations (117)

Assessing crown reduction as a strategy to mitigate drought stress during initial development of sessile oak and Norway spruce saplings

Central European Forestry Journal (2025)

Janko Arsić Marko Stojanović Petr Horáček Sergei Mikhailov Jan Krejza

Abstract Droughts, amplified by climate change, pose a significant threat to the success of both artificially and naturally regenerated forests. Understanding how these changes affect the initial stages of saplings development is crucial for forest establishment, particularly for ecologically and economically important species like Norway spruce and sessile oak in Central Europe. This study investigated the impact of crown reduction (CR) by 50% of crown length on saplings of each species. Automatic dendrometers were installed on 24 saplings per species to precisely monitor growth and water-related stem changes. The main objective was to investigate the potential ameliorative effect of CR on water-stressed saplings during their initial development. Our study hypothesized that CR, by decreasing leaf area and consequently water use, would improve water availability and facilitate sapling growth. The results indicate that CR may enhance soil water availability thereby supporting the growth of water-stressed Norway spruce saplings but not those of sessile oak. The tree water deficit – an indicator of tree water status – significantly improves in Norway spruce saplings subjected to CR ( p < 0.05). Conversely, this treatment resulted in the depletion of stem water status in sessile oak saplings. The species-specific growth phenology revealed that CR led to an increase in the number of growing days for Norway spruce compared to sessile oak saplings. In summary, CR may be considered a beneficial method for alleviating stress in Norway spruce saplings, especially during drought. In addition, further testing in field conditions is necessary to confirm these results.

10.2478/forj-2024-0024

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Use of soil enzyme activities to assess the recovery of soil functions in abandoned coppice forest systems

The Science of The Total Environment (2019)

Hanadi Ananbeh Marko Stojanović Antonio Pompeiano Stanislava Voběrková Carmen Trasar-Cepeda

High forest

10.1016/j.scitotenv.2019.133692

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Citations (47)

Transpiration and water potential of young Quercus petraea (M.) Liebl. coppice sprouts and seedlings during favourable and drought conditions

Journal of Forest Science (2017)

Marko Stojanović Justyna Szatniewska Ina Kyselová Radek Pokorný Matjaž Čater

Increased frequency and intensity of drought events consequently affect oak high forests with the process of further decline, compromised growth and questionable natural regeneration. To overcome such difficulties, new adaptive strategies are required. Coppicing, as the oldest way of forest management, might provide some solutions. In our study two contrasting management systems, sessile oak coppice and high forest, were compared at the initial stages of regeneration and forest development. The transpiration of young oak sprouts and seedlings was monitored using sap flow systems during the 2015 growing season. The study of transpiration also included leaf water potential measurements during three measurement campaigns with contrasting weather conditions. Coppice sprouts transpired significantly more than seedlings on the individual tree and stand level during the entire growing season 2015; particularly large differences were observed during drought conditions. Coppice sprouts experienced lower water limitations due to the voluminous and deeper root system as indicated by leaf water potential results. Presented results attribute young coppices as one of the promising adaptable forest management types with a better adaptive strategy at the extreme sites under water limiting conditions.

Quercus petraea

Growing season

10.17221/36/2017-jfs

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Citations (22)