Agricultural and Forest Meteorology, Journal Year: 2025, Volume and Issue: 363, P. 110430 - 110430
Published: Feb. 7, 2025
Language: Английский
Global Change Biology, Journal Year: 2022, Volume and Issue: 28(14), P. 4439 - 4458
Published: March 23, 2022
Rear-edge populations at the xeric distribution limit of tree species are particularly vulnerable to forest dieback triggered by drought. This is case silver fir (Abies alba) forests located in Southwestern Europe. While drought-induced patterns have been previously explored, information on role played nutritional impairment lacking despite its potential interactions with carbon-water balances. We performed a comparative analysis radial growth, intrinsic water-use efficiency (iWUE), oxygen isotopes (δ18 O) and nutrient concentrations leaves declining (DD) non-declining (ND) trees four Spanish Pyrenees. also evaluated relationships among predisposition, intraspecific trait variation (wood density leaf traits) rhizosphere soil physical-chemical properties. The onset growth decline DD occurred more than two decades ago, they subsequently showed low resilience against droughts. presented consistently lower foliar nutrients such as P, K, Cu Ni ND trees. strong effects status indices support key mineral nutrition functioning before, during after In contrast, variability wood morphological traits, well properties, weak drought performance. At elevation, warmer sites, stronger climate-growth δ18 O uncoupling between iWUE O, together positive correlations P K point deeper soil/bedrock water sources vertical decoupling uptake study provides novel insights into mechanisms driving highlights need incorporate studies.Las poblaciones del límite xérico de distribución las especies árboles son particularmente vulnerables al decaimiento forestal inducido por sequía. Este es el caso los bosques abeto situados en suroeste Europa. Si bien patrones provocado sequía se han explorado previamente, falta información sobre papel que desempeña deterioro nutricional pesar sus interacciones potenciales con balances agua y carbono árboles. En este estudio, hemos realizado un análisis comparativo crecimiento radial, la eficiencia intrínseca uso isótopos oxígeno (δ18O) concentraciones nutrientes hojas decaídos no cuatro abetares Pirineos españoles. También evaluamos relaciones entre predisposición decaimiento, variación rasgos intraespecíficos (densidad madera hojas) propiedades físico-químicas rizosfera. El inicio disminución ocurrió hace más dos décadas posteriormente mostraron una baja resiliencia frente sequías. Los presentaron foliares consistentemente bajas como ND. fuertes efectos estado índices respaldan clave nutrición funcionamiento antes, durante después contraste, variabilidad densidad morfológicos hojas, así suelo, relación débil respuesta sitios cálidos elevación, clima-crecimiento bajo desacoplamiento junto correlaciones positivas apuntan fuentes profundas suelo/lecho rocoso absorción DD. estudio proporciona novedosa mecanismos impulsan destaca necesidad incorporar estudios muerte regresiva bosque.
Citations
35
Hydrology and earth system sciences, Journal Year: 2022, Volume and Issue: 26(15), P. 4125 - 4146
Published: Aug. 8, 2022
Abstract. Isotope-based approaches to study plant water sources rely on the assumption that root uptake and within-plant transport are non-fractionating processes. However, a growing number of studies have reported offsets between source stable isotope composition for wide range ecosystems. These isotopic can result in erroneous attribution used by plants potential overestimations groundwater vegetation. We conducted global meta-analysis quantify magnitude these explored whether their variability could be explained either biotic or abiotic factors. Our database compiled 112 spanning arctic tropical biomes dual (δ2H δ18O) (stem) water, including soil (sampled following various methodologies along variable depths). calculated 2H two ways: line conditioned excess (LC-excess) describes deviation from local meteoric (SW-excess) line, each sampling campaign within study. tested effects climate (air temperature content), class, traits (growth form, leaf habit, wood density, parenchyma fraction mycorrhizal habit) LC-excess SW-excess. Globally, stem was more depleted than (SW-excess < 0) 3.02±0.65 ‰ (P 0.05 according estimates our linear mixed model weighted sample size studies). In 95 % cases where SW-excess negative, indicating had not undergone evaporative enrichment (such as groundwater) unlikely explain observed soil–plant offsets. Soil class did any significant effect negative cold wet sites, whereas it positive warm sites. The climatic suggest methodological artefacts sole cause results would imply may lead inaccuracies when using bulk proxy infer sources.
Language: Английский
Citations
35
Agricultural and Forest Meteorology, Journal Year: 2024, Volume and Issue: 348, P. 109932 - 109932
Published: Feb. 19, 2024
Language: Английский
Citations
6
Forest Ecology and Management, Journal Year: 2020, Volume and Issue: 480, P. 118639 - 118639
Published: Oct. 4, 2020
Language: Английский
Citations
41
Plant Ecology & Diversity, Journal Year: 2021, Volume and Issue: 14(1-2), P. 1 - 12
Published: March 4, 2021
Background: Climate warming is amplifying and exacerbating drought stress worldwide. Long-term trends of increasing evaporative demand decreasing soil moisture availability occur superimposed on severe spells drought. These rare, extreme droughts have triggered episodes forest dieback that led to reduced productivity rising mortality rates, usually at small scales (dieback hotspots), but affecting biomes worldwide.Aims: This review summarizes discusses the drivers, patterns mechanisms caused by drought.Methods: I studies tree death linked dry with a focus tools forecast dieback.Results: Several been described as physiological drivers dieback, including hydraulic failure carbon starvation, however hydraulics-based models shown little predictive power mortality. Field proxies vigour, changes in canopy defoliation water content, combined surrogates functioning (tree-ring growth, wood anatomy, tree-ring δ13C or δ18O composition) may improve predictions least render early-warning signals impending death.Conclusions: Drought-induced are concerning phenomena which lack forecasting sufficient power. Surrogates growth should be used build more accurate response climate events Here, argue for combining comparing those better dieback.
Language: Английский
Citations
36
Forest Ecology and Management, Journal Year: 2021, Volume and Issue: 491, P. 119097 - 119097
Published: April 7, 2021
Climate warming-related drought could become a major driver of large-scale forest dieback. However, little is known about how past management legacies modulate the climate-growth responses during recent dieback episodes in central European oak forests. Here, we examine role played by –unmanaged old-growth vs. managed forests– tree mortality events occurring Quercus petraea (Matt.) Liebl. stands across large areas western Romania. We analyze stand structure (tree size, competition) and climatic factors (drought, temperature precipitation) drive radial growth patterns neighboring standing dead living trees. analyzed basal area increments (BAI) trends, climate- drought-growth relationships 20th century to distinguish roles interactions on warming-induced observed that rises changes atmospheric water demand growing season let increasing stress late affecting both unmanaged Dead trees from forests showed lower than after onset. In forests, displayed divergent dry 1980s, indicating was triggered severe extreme conditions. experienced significant stronger reductions 1980s though they less tree-to-tree competition forest. High density negatively drove enhanced climate sensitivity stands. Competition acted synergistically with warming causing regardless Q. Our retrospective assessment rates relation offers valuable information for further conservation decisions These findings highlight importance uses driving temperate making them more vulnerable under forecasted climate-warming related droughts Europe.
Language: Английский
Citations
35
Agricultural and Forest Meteorology, Journal Year: 2021, Volume and Issue: 310, P. 108636 - 108636
Published: Sept. 11, 2021
Language: Английский
Citations
35
Forest Ecosystems, Journal Year: 2021, Volume and Issue: 8(1)
Published: Nov. 18, 2021
Abstract Background Water migration and use are important processes in trees. However, it is possible to overestimate transpiration by equating the water absorbed through plant roots that diffused back atmosphere stomatal transpiration. Therefore, necessary quantify transpired stored plants. Method The δ 2 H/δ 18 O technique heat ratio method were used explore usage of coniferous broad-leaved tree species, including proportions for storage. Results Platycladus orientalis Quercus variabilis had strong plasticity their from different sources. primarily groundwater (30.5%) 60–100-cm soil layer (21.6%) throughout experimental period was sensitive precipitation, absorbing 0–20-cm (26.6%) during rainy season. all sources (15.7%–36.5%) except 40–60-cm dry In addition, did not change its source but increased uptake annual mean fluxes P. Q. 374.69 469.50 mm·year − 1 , with 93.49% 93.91% transpiration, respectively. nocturnal sap flow mainly storage trunk rather than which effectively alleviated drought stress facilitated transport nutrients. Conclusions both species comprised 6%–7% total and, therefore, should be considered balance models.
Language: Английский
Citations
34
Dendrochronologia, Journal Year: 2021, Volume and Issue: 66, P. 125812 - 125812
Published: Jan. 20, 2021
Dieback in temperate forests is understudied, despite this biome predicted to be increasingly affected by more extreme climate events a warmer world. To evaluate the potential drivers of dieback we reconstructed changes radial growth and intrinsic water-use efficiency (iWUE) from stable isotopes tree rings. Particularly, compared size, radial-growth trends, responses (temperature, precipitation, cloudiness, number foggy days) drought, iWUE declining non-declining trees showing contrasting canopy defoliation. This comparison was done six located northern Spain based on three broadleaved species (Quercus robur, Quercus humilis, Fagus sylvatica). Declining presented lower rates than their counterparts tended show variability, but not all sites. The divergence between significant lasted Q. robur (15–30 years) F. sylvatica (5–10 linked summer drought associated atmospheric patterns, wettest sites cold spells contributed decline. In contrast, most responsive terms reduction followed humilis which showed coupled as function vigour. Low higher characterized trees. However, became less efficient close onset, could indicate impending death. forests, decline can triggered extremes such dry spells, amplified warming rising stress.
Language: Английский
Citations
33
Agricultural and Forest Meteorology, Journal Year: 2023, Volume and Issue: 341, P. 109680 - 109680
Published: Aug. 26, 2023
Warmer and drier conditions increase forest mortality worldwide. At the same time, nitrogen deposition, longer growing seasons higher atmospheric CO2 concentrations may site productivity accelerating growth. However, tree physiological studies suggest that increased can also have adverse effects, reducing adaptation to drought. Understanding such intricate interactions might foster is essential for designing activities policies aimed at preserving forests ecosystem services they provide. This study shows how factors stand features affect susceptibility of Scots pine drought-induced stand-level mortality. We use extensive data covering 750,000 ha, including 47,450 managed stands, which 2,547 were affected by during drought in 2015–2019. found oldest most dense stands on productive sites showed highest enhanced Our findings increasing accelerate intensity prevalence Therefore, climate change mortality, particularly old high-productive forests. Such exacerbated should be considered carbon sink projections, management, designed resilience protect ecosystems.
Language: Английский
Citations
16