Evaluating vegetation vulnerability under compound dry and hot conditions using vine copula across global lands

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 631, P. 130775 - 130775

Published: Feb. 1, 2024

Language: Английский

---

A protocol for high-quality sectioning for tree-ring anatomy

Frontiers in Plant Science, Journal Year: 2025, Volume and Issue: 16

Published: Feb. 26, 2025

Quantitative wood anatomy (QWA), which involves measuring cell anatomical characteristics commonly on dated tree rings, is becoming increasingly important within plant sciences and ecology. This approach particularly valuable for studies that require processing a large number of samples, such as those aimed at millennial-long climatic reconstructions. However, the field faces significant challenges, including absence publicly available comprehensive protocol efficiently uniformly producing high-quality thin sections QWA along tree-ring series. issue especially critical more brittle subfossil wood, in addition to fresh material from living trees. Our manuscript addresses these challenges by providing detailed digital images, specifically tailored long chronologies with an emphasis conifer wood. The includes step-by-step procedures sample preparation, sectioning, imaging, ensuring consistent results. By offering this well-tried-and-tested protocol, we aim facilitate reproducibility accuracy studies, ultimately advancing research field. It aims serve reference researchers laboratories engaged similar work, promoting standardized practices enhancing reliability data.

Language: Английский

---

Biodiversity and Wetting of Climate Alleviate Vegetation Vulnerability Under Compound Drought‐Hot Extremes

Geophysical Research Letters, Journal Year: 2024, Volume and Issue: 51(10)

Published: May 18, 2024

Abstract Global warming has intensified the intensity of compound drought‐hot extremes (CDHEs), posing more severe impacts on human societies and ecosystems than individual extremes. The vulnerability global terrestrial under CDHEs, along with its key influencing factors, remains poorly understood. Based multiple remote sensing data, we construct a Vine Copula model to appraise vegetation attribute it climatic biotic factors for five different types. High is detected in central southern regions North America, eastern South Southern Africa, northern western Europe, Australia. drier climate, higher will be vulnerability. Furthermore, biodiversity biomass are various types, such that richer have lower CDHEs. findings deepen understanding ecosystem response

Language: Английский

---

Adaptive green space management strategies for sustainable carbon sink parks

Urban forestry & urban greening, Journal Year: 2024, Volume and Issue: 94, P. 128236 - 128236

Published: Feb. 13, 2024

Green spaces, such as urban parks, function carbon absorption strategies for the attainment of neutrality. However, parks are at risk losing their based on changes in flux dynamics due to climate change. Therefore, this study proposes an adaptive green space management strategy establishing a sustainable sink park by analyzing parks. To end, first, system model was developed analyze city Second, 10 programs were established enable park. After evaluating effects program, third, three scenarios built according pursued values (ecological, social, economic). As result dynamics, annual net uptake has continuously decreased since 2030 s. The amount decrease rate photosynthesis, increase pests, and mortality. result, lawn area decreases, increases broad-leaf trees, decreases strength most effective increasing following order. In addition, ecological scenario reported have highest cumulative among scenarios. all could not prevent fromlosing function. These results presented flexibility how change threatened sustainability According study, program should be modified sequestration without degrading other functions A further will conducted expand program.

Language: Английский

---

Growth Rate and Not Growing Season Explains the Increased Productivity of Masson Pine in Mixed Stands

Plants, Journal Year: 2025, Volume and Issue: 14(3), P. 313 - 313

Published: Jan. 21, 2025

Increased tree species diversity can promote forest production by reducing intra-specific competition and promoting an efficient unitization of resources. However, questions remain on whether how mixed stands affect the dynamics intra–annual xylem formation in trees, especially subtropical forests. In this study, we randomly selected 18 trees from a monoculture 63-year-old Masson pine (Pinus massoniana) growing pure them with 39-year-old Castanopsis hystrix Pinxiang, southern China. A total 828 microcores were collected biweekly throughout season 2022 to 2023 monitor intra-annual formation. Cell started early March ended late December lasted about 281 284 days. Xylem phenology was similar between stands. During both seasons, showed higher growth rates than those The produced 45–51 cells (growth rate 0.22 day−1) 35–41 (0.17 day−1). Growth rate, not determined superior Our study shows that after 39 years management, C. unevenly aged have significant positive mixing effect cell production, which demonstrates monitoring be important tool evaluate composition reveal mechanisms behind effect.

Language: Английский

---

Unenriched xylem water contribution during cellulose synthesis influenced by atmospheric demand governs the intra‐annual tree‐ring δ¹⁸O signature

New Phytologist, Journal Year: 2023, Volume and Issue: 240(5), P. 1743 - 1757

Published: Sept. 27, 2023

The oxygen isotope composition (δ18 O) of tree-ring cellulose is used to evaluate tree physiological responses climate, but their interpretation still limited due the complexity fractionation pathways. We assessed relative contribution seasonal needle and xylem water δ18 O variations intra-annual signature larch trees at two sites with contrasting soil availability in Swiss Alps. combined biweekly measurements water, twig cellulose, xylogenesis analysis, mechanistic structural equation modeling. Intra-annual values resembled source mean levels better than O. Large parts rings were formed under high proportional exchange unenriched (pex ). Maximum pex achieved August imprinted on sections 50-75% ring. High associated periods atmospheric evaporative demand (VPD). While VPD governed variability, we estimated a Péclet effect both sites. Due variable , has strong influence over large variations, potentially masking signals coming from needle-level processes.

Language: Английский

---

Different climate conditions drive variations in gross primary productivity and woody biomass accumulation in a temperate and a boreal conifer forest in Canada

Agricultural and Forest Meteorology, Journal Year: 2024, Volume and Issue: 355, P. 110125 - 110125

Published: June 18, 2024

Language: Английский

---

The ratio of transpiration to evapotranspiration dominates ecosystem water use efficiency response to drought

Agricultural and Forest Meteorology, Journal Year: 2025, Volume and Issue: 363, P. 110423 - 110423

Published: Jan. 30, 2025

Language: Английский

---

Analysing resilience of European beech tree to recurrent extreme drought events through ring growth, wood anatomy and stable isotopes

Journal of Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 17, 2025

Abstract Recent extreme drought events in Central Europe have caused widespread forest dieback with detrimental effects on functioning and carbon water balance. This impact has been notable European beech ( Fagus sylvatica L.), particularly at the core of its distribution, causing concern among stakeholders questions about resilience capacity trees. The objective this study is to investigate physiological processes linked constraints involved cambial growth drought. We selected 56 trees distributed four plots north‐eastern France different soil deficits characterized retrospectively by a balance model. Functional traits including tree ring width, wood anatomical stable isotopes (e.g. δ 13 C 18 O) were measured assess effect recent recurrent 2015, 2018–2020, 2022. Decreased increased O intrinsic use efficiency (iWUE) observed due shortage, whereas xylem vessel size theoretical specific hydraulic conductivity K th ) did not show obvious changes. Vessel density was negatively correlated annual width index highly sensitive C, iWUE significantly related index. plot that experienced most severe intensity 2018–2020 showed significant decrease resistance compared during 2015 event. Surprisingly, associated isotopic traits. Synthesis . Our results demonstrate structure responds adjusting radial rings relatively diameter. also highlights consecutive or reducing resilience, sites higher intensity. Tree does seem involve changes would promote better cope future shortages.

Language: Английский

---

Exploring the ecosystem services delivered by urban woody plants at Çankırı Castle

Environmental Monitoring and Assessment, Journal Year: 2025, Volume and Issue: 197(3)

Published: Feb. 27, 2025

Language: Английский

---