Local carbon reserves are insufficient for phloem terpene induction during drought in Pinus edulis in response to bark beetle‐associated fungi

New Phytologist, Год журнала: 2024, Номер 244(2), С. 654 - 669

Опубликована: Авг. 16, 2024

Summary Stomatal closure during drought inhibits carbon uptake and may reduce a tree's defensive capacity. Limited availability increase mortality risk, particularly if constrains trees' capacity to rapidly produce defenses biotic attack. We parameterized new model of conifer defense using physiological data on reserves chemical before after simulated bark beetle attack in mature Pinus edulis under experimental drought. Attack was inoculations with consistent bluestain fungus ( Ophiostoma sp.) Ips confusus , the main colonizing this tree, induce response. Trees more produced but measured phloem only accounted for c. 23% induced Our predicted universal local alone supported production, suggesting substantial remobilization transport stored resin or inoculation site. results show that de novo terpene synthesis represents fraction total terpenes P. following fungal inoculation. Without direct attribution concentrations available carbon, many studies be overestimating scale importance

Язык: Английский

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Mistletoe-induced carbon, water and nutrient imbalances are imprinted on tree rings

Tree Physiology, Год журнала: 2024, Номер 44(9)

Опубликована: Авг. 19, 2024

Abstract Mistletoes are xylem-tapping hemiparasites that rely on their hosts for water and nutrient uptake. Thus, they impair tree performance in the face of environmental stress via altering carbon relations nutritional status trees. To improve our understanding physiological responses to mistletoe ongoing climate change, we investigated radial growth, stable oxygen isotopic signals, elemental composition rings silver fir (Abies alba Mill.) Scots pine (Pinus sylvestris L.) forests infested with Viscum album L. We compared temporal series (1990–2020) basal area increment (BAI), intrinsic water-use efficiency (iWUE), isotope (δ18O), concentrations stoichiometric ratios between non-infested (NI) severely (SI) trees from populations located close xeric distribution limit species north-eastern Spain. The SI showed historically higher but BAI trend was negative more than three decades before 2020 growth rates became significantly lower those NI by mid-2010s. Mistletoe infestation related an enhanced sensitivity vapour pressure deficit (atmospheric drought). less pronounced iWUE increases (fir) values (pine) tree-ring δ18O may be result several superimposed effects operating simultaneously, including leaf-level evaporative enrichment, source anatomical phenological differences. observed a deterioration potassium (K) nutrition wood both trees, along accumulation manganese (Mn). suggest such patterns driven indirect effect mistletoe-induced drought stress, particularly pine. combined analyses different indicators imprinted provided evidence progressive onset carbon, imbalances mistletoe-infested conifers inhabiting seasonally dry regions.

Язык: Английский

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Complex imprint of air pollution in the basal area increments of three European tree species

The Science of The Total Environment, Год журнала: 2024, Номер 951, С. 175858 - 175858

Опубликована: Авг. 28, 2024

The impact of atmospheric pollution on the growth European forest tree species, particularly beech, Silver fir and Norway spruce, is examined in five mesic forests Czech Republic. Analyzing basal area increment (BAI) patterns using linear mixed effect models reveals a complex interplay between nitrogen (N) sulphur (S) deposition, climatic variables changing CO

Язык: Английский

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Higher risk of hydraulic dysfunction and carbohydrate depletion of declining Larix principis-rupprechtii trees

Ecological Processes, Год журнала: 2025, Номер 14(1)

Опубликована: Янв. 2, 2025

Abstract Background Climate change associated with droughts has led to widespread forest decline. Hydraulic and carbon-related performances are key physiological processes for the tolerance of trees environmental changes, yet our current understanding such decline is still limited. Here, we investigated hydraulic carbohydrate healthy declining (canopy dieback) in temperate larch ( Larix principis-rupprechtii ) plantations. Results Relative trees, higher native percentage loss xylem conductivity lower indicated a deterioration integrity system trees. Additionally, comparable Huber value, intrinsic water-use efficiency, leaf mass per area between suggest relatively profligate strategy by Declining had nonstructural concentrations leaves, branches, twigs but soluble sugars concentration fine roots than conspecific Conclusions Overall, plantations would be more vulnerable drought due risk dysfunction depletion.

Язык: Английский

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Climate and Biological Factors Co-Regulate the Drought Resilience of Pinus Tabulaeformis

Опубликована: Янв. 1, 2025

Severe drought can threaten the structure and function of forest ecosystems by profoundly altering plant growth mortality. Identifying drivers influencing resilience is essential for understanding global warming effect on ecosystem. However, direct indirect impacts multiple climate biological factors remain unquantified, a potential mechanistic pathway remains unexplored. Here, we aimed to quantify resistance, recovery, Pinus tabulaeformis using basal area increment. We showed that Palmer Drought Severity Index had significant positive impact negative but non-significant resilience. Tree age pre-drought increments (preBAI) effects recovery resilience, while only preBAI significantly affected resistance. Additionally, competition index relatively minor exerted influence limiting diameter at breast height (DBH). This research suggests co-regulate in this region. findings are helpful comprehending ecological ecosystem stability, provide useful insights effective management under future change.

Язык: Английский

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Die-off after an extreme hot drought affects trees with physiological performance constrained by a more stressful abiotic niche

Agricultural and Forest Meteorology, Год журнала: 2025, Номер 363, С. 110430 - 110430

Опубликована: Фев. 7, 2025

Язык: Английский

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Global Change Impacts on Forest Elementomes and Insights for Improved Management Practices

Current Climate Change Reports, Год журнала: 2025, Номер 11(1)

Опубликована: Март 6, 2025

Язык: Английский

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Parallel but different deaths: sudden drought-trigged mortality in Scots pine versus slow climate- and mistletoe-driven mortality in silver fir

Forest Ecology and Management, Год журнала: 2025, Номер 590, С. 122797 - 122797

Опубликована: Май 16, 2025

Язык: Английский

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The increasing drought sensitivity of silver fir (Abies alba Mill.) is evident in the last two decades

Journal of Forest Science, Год журнала: 2023, Номер 69(2), С. 67 - 79

Опубликована: Фев. 15, 2023

Silver fir (Abies alba Mill.) is still counted among drought-tolerant tree species. However, its ability to cope with the recent extremely dry period has not yet been sufficiently studied. The objective of research was analyse differences in climate-growth response between silver fir, Norway spruce (Picea abies L. Karst.) and European larch (Larix decidua growing areas large-scale disintegration stands. In 2019–2021, increment cores were sampled at 16 sites along altitudinal gradient 340–775 m a.s.l. different regions Czech Republic affected by bark beetle outbreak. radial growth pattern compared that or under same site conditions. missing rings frequently recorded during peak SO2 pollution load 1966–1985, but they rarely identified years. larch, less common occurred mainly after 2015. Fir sensitive summer drought especially spruce, which showed high sensitivity regardless altitude. significant positive precipitation up 450 a.s.l., however, increased last two decades. Hence, when considering wider use it necessary respect ecological requirements as much possible order preserve vitality production potential changing climatic

Язык: Английский

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Contributions of Intraspecific Variation to Drought Tolerance in Trees

Current Forestry Reports, Год журнала: 2023, Номер 9(6), С. 461 - 472

Опубликована: Сен. 22, 2023

Abstract Purpose of Review The capacity woody plants to cope with climate change depends on their adjustments changing environmental conditions by phenotypic plasticity or genotypic changes (i.e., local adaptation). To determine whether intraspecific trait variation (ITV) translates into resistance tolerance drought and eventually how it relates performance when facing drought, we reviewed the recent literature in plant functional traits along aridity gradients. Recent Findings At level, vary gradients, but this considered species. While ITV is ubiquitous relevant magnitude, its relationship tree case growth survival unclear very idiosyncratic. Summary varies gradients and, for several traits, comparable magnitude as interspecific variation. However, between not consistent among This makes use challenging quantifying contribution tolerance.

Язык: Английский

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