Linking sap flow and tree water deficit in an unmanaged, mixed beech forest during the summer drought 2022 DOI Creative Commons
Laura Somenguem Donfack, Martina Mund, Franziska Koebsch

и другие.

Plant Biology, Год журнала: 2024, Номер unknown

Опубликована: Дек. 25, 2024

Temperate mixed forests are currently experiencing severe drought conditions and face increased risk of degradation. However, it remains unclear how critical tree physiological functions such as sap flow density (SFD) water deficit (TWD, defined reversible stem shrinkage when is depleted), respond to extreme environmental they interact under dry conditions. We monitored SFD TWD three co-occurring European species (Fagus sylvatica, Fraxinus excelsior Acer pseudoplatanus) in conditions, using high temporal resolution flow, dendrometer, measurements. Species-specific responses soil drying did not differ significantly, while was significantly higher F. excelsior. Inter-specific differences wood anatomy use strategies consistently explain these responses. responded both moisture content (SWC) during wet (SWC ≥ 0.2) < phases, with responding more strongly. There a significant correlation for vapour pressure (VPD) only the phase, VPD phase. During incoming PPFD correlated all species, sylvatica negatively SFD, showing hysteresis effects from which decreasing sigmoidal phase along gradient observed. The nonlinear correlations between may result time lag two variables, their different sensitivities SWC intensities. conclude that, stress, cannot be used proxy or vice versa.

Язык: Английский

Water status dynamics and drought tolerance of juvenile European beech, Douglas fir and Norway spruce trees as dependent on neighborhood and nitrogen supply DOI
Sharath Shyamappa Paligi,

Jens Lichter,

Martyna M. Kotowska

и другие.

Tree Physiology, Год журнала: 2024, Номер 44(5)

Опубликована: Апрель 25, 2024

Abstract To increase the resilience of forests to drought and other hazards, foresters are increasingly planting mixed stands. This requires knowledge about response tree species in pure mixed-culture neighborhoods. In addition, frequently interacts with continued atmospheric nitrogen (N) deposition. disentangle these factors for European beech, Norway spruce Douglas fir, we conducted a replicated 3-factorial sapling growth experiment three moisture levels, (high, medium, low), two N levels (high ambient), We measured biomass, stomatal conductance (GS), shoot water potential (at predawn: ΨPD, midday, turgor loss point: ΨTLP), branch xylem embolism resistance (Ψ50) minimum epidermal (Gmin). The differed most respect Gmin (10-fold higher beech than conifers), hydroscape area (larger beech), time elapsed reach closure (TΨGS90) ΨTLP (TTLP; shorter while Ψ50 were remarkably similar. Neighborhood (pure vs mixed-culture) influenced biomass production, status hydraulic traits, notably GS (higher but lower mixtures culture), safety margin (smaller mixtures), TΨGS90 TTLP (shorter mixture). High generally increased GS, no consistent effects on leaf traits detected, suggesting that neighbor identity had larger effect plant relations availability. conclude both neighborhood availability modulate spruce, fir. Species mixing can alleviate stress some species, often by disadvantaging species. Thus, our study suggests stabilizing building production against drier warmer climate may depend primarily right choice; support agenda.

Язык: Английский

Процитировано

7

Acclimation of mature spruce and beech to five years of repeated summer drought – The role of stomatal conductance and leaf area adjustment for water use DOI Creative Commons
Benjamin D. Hesse, Kyohsuke Hikino, Timo Gebhardt

и другие.

The Science of The Total Environment, Год журнала: 2024, Номер 951, С. 175805 - 175805

Опубликована: Авг. 27, 2024

Forests globally are experiencing severe droughts, leading to significant reductions in growth, crown dieback and even tree mortality. The ability of forest ecosystems acclimate prolonged repeated droughts is critical for their survival with ongoing climate change. In a five-year throughfall exclusion experiment, we investigated the long-term physiological morphological acclimation mature Norway spruce (Picea abies [L.] KARST.) European beech (Fagus sylvatica L.) summer drought at leaf, shoot whole level. Throughout period, reduced total water use by 70 % only 4-9 L per day tree, while was less affected about 30 reduction use. During first two summers, achieved this closing stomata up 80 %. Additionally, from second onwards, produced shorter shoots needles, resulting stepwise leaf area over 50 end experiment. Surprisingly, no premature loss observed. This allowed gradual increase stomatal conductance. After consumption same as controls, still reduced. contrast, showed whole-tree area, but nevertheless closure. If restriction transpiration closure sufficient ensure during then slow steady will successful use, stress survival. Neighboring appeared benefit water-saving strategy using excess water.

Язык: Английский

Процитировано

6

Drought resistance and drought adaptation of Douglas-fir (Pseudotsuga menziesii) – a review DOI Creative Commons
Christoph Leuschner, Frederick C. Meinzer

Perspectives in Plant Ecology Evolution and Systematics, Год журнала: 2024, Номер 65, С. 125829 - 125829

Опубликована: Окт. 23, 2024

Язык: Английский

Процитировано

4

Water consumption of beech, spruce and Douglas fir in pure and mixed stands in a wet and a dry year – Testing predictions of the iso/anisohydry concept DOI Creative Commons
Sharath Shyamappa Paligi, Roman M. Link, Christina Hackmann

и другие.

The Science of The Total Environment, Год журнала: 2025, Номер 970, С. 178948 - 178948

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0

Stable isotope inferred intrinsic water use efficiency and its relation to N sources in temperate tree regeneration with increasing levels of N deposition, precipitation, and temperature DOI Creative Commons
Viktoria Dietrich, Jörg Niederberger, Markus Hauck

и другие.

Environmental and Experimental Botany, Год журнала: 2025, Номер unknown, С. 106125 - 106125

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0

The effect of climate at origin on Douglas-fir growth, leaf traits and embolism resistance along a rainfall gradient in Central Europe DOI Creative Commons
Vincent P. Riedel, Philipp Engel, Pierre‐André Waite

и другие.

Trees, Год журнала: 2025, Номер 39(2)

Опубликована: Март 28, 2025

Язык: Английский

Процитировано

0

Shifts in resource allocation and aggravation of foliage development restrict the growth rate of Picea abies under increasing atmospheric humidity at high latitudes DOI
Arne Sellin, Katrin Heinsoo, Eele Õunapuu-Pikas

и другие.

The Science of The Total Environment, Год журнала: 2025, Номер 979, С. 179452 - 179452

Опубликована: Апрель 27, 2025

Язык: Английский

Процитировано

0

Ecological assessment of forest management approaches to develop resilient forests in the face of global change in Central Europe DOI Creative Commons
Franka Huth, Alexander Tischer, Petia Simeonova Nikolova

и другие.

Basic and Applied Ecology, Год журнала: 2025, Номер unknown

Опубликована: Май 1, 2025

Язык: Английский

Процитировано

0

The increasing role of drought as an inciting factor of bark beetle outbreaks can cause large-scale transformation of Central European forests DOI Creative Commons

Agnish Kumar Das,

Marco Baldo, Laura Dobor

и другие.

Landscape Ecology, Год журнала: 2025, Номер 40(6)

Опубликована: Май 23, 2025

Abstract Context Historically, large-scale outbreaks of the European spruce bark beetle were initiated mainly by windthrows. However, after 2018, a severe drought triggered hitherto largest outbreak observed in Europe, signalling major shift disturbance regime. Objectives Develop and test an approach that allows simulating this novel dynamics evaluate landscape-scale compound impacts wind- drought-initiated throughout twenty-first century. Methods We incorporated into forest landscape simulation model iLand, using critical values vapour pressure deficit as trigger. Forest management records remote sensing-based maps used to derive parameters simulated Central (41,000 hectares). The period 1961–2021 was for evaluation, years until 2100 scenario analysis. Results I ncorporating trigger led notable decoupling wind disturbances, which have historically formed typical cascade forests. While growing stock species composition resilient wind-dominated regime, resilience diminished under compounded impact drought-triggered disturbances. new regime caused persistent decline Norway resulted overall decrease landscape-level stock. Conclusions Our findings underscore urgent need approaches increasingly complex suggest future beetles on landscapes may be greater than previously anticipated.

Язык: Английский

Процитировано

0

Linking sap flow and tree water deficit in an unmanaged, mixed beech forest during the summer drought 2022 DOI Creative Commons
Laura Somenguem Donfack, Martina Mund, Franziska Koebsch

и другие.

Plant Biology, Год журнала: 2024, Номер unknown

Опубликована: Дек. 25, 2024

Temperate mixed forests are currently experiencing severe drought conditions and face increased risk of degradation. However, it remains unclear how critical tree physiological functions such as sap flow density (SFD) water deficit (TWD, defined reversible stem shrinkage when is depleted), respond to extreme environmental they interact under dry conditions. We monitored SFD TWD three co-occurring European species (Fagus sylvatica, Fraxinus excelsior Acer pseudoplatanus) in conditions, using high temporal resolution flow, dendrometer, measurements. Species-specific responses soil drying did not differ significantly, while was significantly higher F. excelsior. Inter-specific differences wood anatomy use strategies consistently explain these responses. responded both moisture content (SWC) during wet (SWC ≥ 0.2) < phases, with responding more strongly. There a significant correlation for vapour pressure (VPD) only the phase, VPD phase. During incoming PPFD correlated all species, sylvatica negatively SFD, showing hysteresis effects from which decreasing sigmoidal phase along gradient observed. The nonlinear correlations between may result time lag two variables, their different sensitivities SWC intensities. conclude that, stress, cannot be used proxy or vice versa.

Язык: Английский

Процитировано

0