Growth resistance and resilience of mixed silver fir and Norway spruce forests in central Europe: Contrasting responses to mild and severe droughts

Global Change Biology, Год журнала: 2021, Номер 27(18), С. 4403 - 4419

Опубликована: Июнь 24, 2021

Abstract Extreme droughts are expected to increase in frequency and severity many regions of the world, threatening multiple ecosystem services provided by forests. Effective strategies adapt forests such require comprehensive information on effects importance factors influencing forest resistance resilience. We used a unique combination inventory dendrochronological data from long‐term (>30 years) silvicultural experiment mixed silver fir Norway spruce mountain along temperature precipitation gradient southwestern Germany. aimed at examining mechanisms stand characteristics underpinning resilience past mild severe droughts. found that (i) benefited showed higher (i.e., lower growth loss during drought) faster return pre‐drought levels) than all droughts; (ii) species identity determined drought responses while interactions management‐related strongly influenced (iii) intraspecific interspecific had contrasting two species, with being less resistant when exposed interaction beech; (iv) values residual basal area following thinning were associated (v) larger trees resilient events but highly vulnerable Our study provides an analytical approach for different individual tree‐ stand‐level response. The investigated here certain extent droughts, even conditions, affected Lastly, negative can be reduced through modifying composition, tree size distribution density fir‐Norway

Язык: Английский

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Forest thinning increases soil carbon stocks in China

Forest Ecology and Management, Год журнала: 2020, Номер 482, С. 118812 - 118812

Опубликована: Дек. 8, 2020

Язык: Английский

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Life after recovery: Increased resolution of forest resilience assessment sheds new light on post‐drought compensatory growth and recovery dynamics

Journal of Ecology, Год журнала: 2021, Номер 109(9), С. 3157 - 3170

Опубликована: Янв. 17, 2021

Abstract Understanding the impacts of extreme drought on forest productivity requires a comprehensive assessment tree and resilience. However, current approaches to quantifying resilience limit our understanding response dynamics, recovery trajectories legacies by constraining temporal scale resolution assessment. We compared individual growth histories with forecasted using dynamic regression at an annual resolution, allowing impact stand level dynamics be assessed relative scenario where no occurred. The novel application this approach allowed us quantify cumulative legacy radial multiple stem heights different densities. show that choice pre‐ post‐drought periods over which is can lead systematic bias in both estimates interpretations indices. In contrast, measuring annually revealed clear nonlinearities trajectories. Furthermore, we demonstrate influence pre‐drought attributes such as size, rates densities were only detectable certain stages recovery. Importantly, become positive for some individuals, extending up 9 years after event post‐recovery result reclamation lost basal area. Synthesis . importance increasing order understand patterns drivers highlight shortcomings collapsing into single average value how persist phase, even positively impacting trees. If unaccounted for, phase underestimation overestimation above‐ground losses productivity, highlighting considering longer‐term compensatory

Язык: Английский

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Tree growth responses to extreme drought after mechanical thinning and prescribed fire in a Sierra Nevada mixed-conifer forest, USA

Forest Ecology and Management, Год журнала: 2022, Номер 510, С. 120107 - 120107

Опубликована: Фев. 25, 2022

Язык: Английский

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The lagged effect and impact of soil moisture drought on terrestrial ecosystem water use efficiency

Ecological Indicators, Год журнала: 2021, Номер 133, С. 108349 - 108349

Опубликована: Ноя. 8, 2021

Water use efficiency (WUE) is an ecological indicator reflecting the link between carbon and water cycles in terrestrial ecosystems, which often affected by drought disturbance. However, knowledge about influences of soil moisture on WUE still lacking. Therefore, this paper aims to quantify lagged effect impact ecosystem from 1982 2018 using ERA5 Global Land Surface Satellite (GLASS) datasets. Drought conditions are described anomaly percentage index (SMAPI). The measured month with maximum significant correlation SMAPI WUE. estimated through relative change during non-drought periods. results showed that: (1) had approximately 4-month WUE, was observed 70.87% global vegetated areas. a short period (1–4 months) for shrubland sparse vegetation, middle long periods (5–12 forest. (2) When occurred, decreased 36.95% Tibetan Plateau 24.93% West Africa, while North Europe, Alaska/N.W. Canada, Asia increased 14.64%, 8.83%, 8.53%, respectively. negative positive impacts each vegetation type were commensurate. Our provide useful information understanding response drought..

Язык: Английский

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Pre- and post-drought conditions drive resilience of Pinus halepensis across its distribution range

Agricultural and Forest Meteorology, Год журнала: 2023, Номер 339, С. 109577 - 109577

Опубликована: Июль 1, 2023

Язык: Английский

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Topographic and climatic effects on Pinus halepensis s.l. growth at its drought tolerance margins under climatic change

Journal of Forestry Research, Год журнала: 2024, Номер 35(1)

Опубликована: Июнь 15, 2024

Abstract Under global warming, drought will reduce productivity of Pinus halepensis s.l. (subspecies and brutia ) cause a retreat from its rear edge distribution (latitudinal/elevational) in the Mediterranean. To test whether topography can influence this scenario, we studied for approximately 40 years growth six natural pine stands water-limited habitats on islands Zakinthos Samos (eastern Mediterranean Greece), determined critical moisture sources that drove growth. Dominant pines were selected with no permanent water under contrasting conditions created by (“wet”-gulley/valley vs. “dry”-upslope habitats). The responses P. to moderate worst case scenario tested, projected warming (approx. − 25% 40% annual precipitation compared 1961–1990 average). Our results show “wet” habitat had higher normal wet climate. However, more declined, tree was reduced at significantly faster rate, but also showed recovery, once rainfall returned. Thus, populations gullies/valleys, may be resilient less likely towards elevation/latitudes dry upslope sites. drought, both ecosystems relied deeper pools supplied previous 3–6 (including year growth). valley/gully soils (and probably heavily weathered bedrock), appeared utilize surface winter/spring efficiently survival recovery. deep provide key “buffer” such could act as potential refugia climate change.

Язык: Английский

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Effect of shrubland-to-grassland conversion on soil water storage and infiltration capacity in Loess Plateau region of China

CATENA, Год журнала: 2025, Номер 249, С. 108720 - 108720

Опубликована: Янв. 14, 2025

Язык: Английский

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A high‐temperature water vapor equilibration method to determine non‐exchangeable hydrogen isotope ratios of sugar, starch and cellulose

Plant Cell & Environment, Год журнала: 2021, Номер 45(1), С. 12 - 22

Опубликована: Сен. 26, 2021

Abstract The analysis of the non‐exchangeable hydrogen isotope ratio (δ 2 H ne ) in carbohydrates is mostly limited to structural component cellulose, while simple high‐throughput methods for δ values non‐structural (NSC) such as sugar and starch do not yet exist. Here, we tested if hot vapor equilibration method originally developed cellulose applicable NSC, verified by comparison with traditional nitration method. We set up a detailed analytical protocol applied plant extracts leaves from species different photosynthetic pathways (i.e., C 3 , 4 CAM). commercial sugars classes sources, ranging −157.8 +6.4‰, were reproducibly analysed precision between 0.2‰ 7.7‰. Mean are lowest (−92.0‰), intermediate (−32.5‰) highest CAM plants (6.0‰), NSC being H‐depleted compared generally more H‐enriched than starch. Our results suggest that our can be used future studies disentangle H‐fractionation processes, improving mechanistic models leaf tree‐ring further development potential proxy climate, hydrology, metabolism physiology.

Язык: Английский

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Developing alternatives to adaptive silviculture: Thinning and tree growth resistance to drought in a Pinus species on an elevated gradient in Southern Spain

Forest Ecology and Management, Год журнала: 2023, Номер 537, С. 120936 - 120936

Опубликована: Март 27, 2023

Forest plantations are more vulnerable to the stress induced by biotic and abiotic factors than naturally regenerated forests. These effects can be aggravated a lack of management in large reforestation areas, thinning could, therefore, help trees reduce dieback tree mortality related drought. We address this question using dendrochronology modelling approach improve understanding growth response high-density planted pine forests drought-prone areas Southern Spain. An experimental trial was, carried out with three species (Pinus halepensis, P. nigra, sylvestris) treatments (unthinned, moderate, heavy thinning), after which growth-climate relationships drought vulnerability indices were assessed. Three separate generalized linear mixed-effects models (GLMM), one for each location, fitted BAI as variable, post-thinning trajectories also simulated. Ten-year basal area showed strong responses following treatment (BAI10, 72% halepensis 50% sylvestris regards 51% nigra moderate different precipitation temperature according intensity. The significant on indicated that had positive effect, irrespective species, although was evident case (recovery F = 28.10, p < 0.001, resilience 35.21, 0.001 respectively) 10.97, 16.91, 0.001). climatic effect greater sylvestris. simulation provides information long-term effectiveness thinning; tended attenuated 20 years, but not halepensis. High values modelled found thinning, time recovery between two four years depending Our findings advantages under constraints, particularly This work is new contribution demonstrates urgent need forest managers take steps order drought-vulnerable Mediterranean adapt risks posed climate change.

Язык: Английский

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