Seasonal Differences in Vegetation Susceptibility to Soil Drought During 2001–2021 DOI
Jiwang Tang, Ben Niu, Jinlong Peng

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2024, Volume and Issue: 129(12)

Published: Dec. 1, 2024

Abstract Droughts typically exert negative effects on vegetation growth, which largely depend the timing of drought onset. However, huge inconsistencies exist in seasonal response to among diverse regions across globe. Here, using leaf area index (LAI) and solar‐induced chlorophyll fluorescence (SIF), we quantified susceptibility by calculating coincidence rate between suppression extremes soil droughts, further investigated spatiotemporal changes during different seasons from 2001 2021. We found summer dry were most susceptible droughts extra‐tropics tropics, respectively. Temporally, autumn was strengthening drought‐susceptible extra‐tropics, albeit with insignificant change spring, entire growing season. Both wet showed evidently increasing tropical ecosystems, dominated enhanced global regions. Our findings determined spatial pattern globe highlighted risk especially tropics.

Language: Английский

The study of the response regularity of photosynthesis to flash drought in different vegetation ecosystems of the middle and lower reaches of the Yangtze River Basin DOI
Yunjun Zhan,

Chuanqi Ma,

Yan Yan

et al.

International Journal of Biometeorology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Language: Английский

Citations

0
Widespread Sensitivity of Vegetation to the Transition From Normal Droughts to Flash Droughts DOI Creative Commons
Junjie Liao, Yuyue Xu, Jiatian Pi

et al.

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(6)

Published: March 16, 2025

Abstract Global climate change has intensified flash droughts, which differ from traditional and have significant ecological impacts. However, differences in ecosystem responses to normal droughts China remain unclear, particularly terms of vegetation vulnerability resilience. Using a three‐dimensional clustering method, we identified disparities between these drought types 1982 2022 found that developed 40% faster than but caused more severe damage. With the transition sensitivity increased. Shapley's additive interpretation assessed role each environmental factor recovery. The results show characteristics drive resilience vegetation, whereas temperature vapor pressure deficit become significant. These insights provide deeper understanding tolerance under changing climatic conditions.

Language: Английский

Citations

0
Quantifying the nonlinear and interactive effects of urban form on resilience to extreme precipitation: Evidence from 192 cities of Southern China DOI
Wenrui Wang, Yang Wang, Chen Shen

et al.

Sustainable Cities and Society, Journal Year: 2025, Volume and Issue: unknown, P. 106366 - 106366

Published: April 1, 2025

Language: Английский

Citations

0
Spatio-Temporal Variation Characteristics of Grassland Water Use Efficiency and Its Response to Drought in China DOI Open Access

Mengxiang Xing,

Liang Liu,

Jianghua Zheng

et al.

Water, Journal Year: 2025, Volume and Issue: 17(8), P. 1134 - 1134

Published: April 10, 2025

Understanding the impact of drought on water use efficiency (WUE) grasslands is essential for comprehending mechanisms carbon–water cycle in context global warming. Nevertheless, cumulative and lagged effects WUE across different grassland types China remain unclear. This study investigates from 1982 to 2018. We employed Sen-MK trend test correlation analysis identify primary factors influencing temporal WUE. The results indicated that Chinese grasslands, various types, exhibited an upward over time, with most rapid increase observed meadow. Drought had both WUE, lasting average 5.2 months 6.1 months. Specifically, lasted 5.6 alpine subalpine meadow, slope, desert grassland, whereas 9 plain grassland. Furthermore, influence varied intensified increasing altitude. trends impacts aridity index (AI) zones were consistent those as a whole. Our findings underscore response their distinct primarily characterized by effects. research provides important reference value enhancing stability ecosystems.

Language: Английский

Citations

0
Transcriptomic analysis of melatonin-mediated drought stress response genes in alfalfa during germination period DOI Creative Commons
Xiaoxia Zhang, Wenxuan Zhu, Zirui Liu

et al.

BMC Plant Biology, Journal Year: 2025, Volume and Issue: 25(1)

Published: May 14, 2025

Language: Английский

Citations

0
Investigating the temporal lag and accumulation effect of climatic factors on vegetation photosynthetic activity over subtropical China DOI Creative Commons

Juanzhu Liang,

Xueyang Han,

Yuke Zhou

et al.

Ecological Indicators, Journal Year: 2024, Volume and Issue: 166, P. 112406 - 112406

Published: July 27, 2024

Monitoring vegetation photosynthesis in China's subtropical regions using remote sensing is challenging because of the complex ecosystems and climate variability. Previous studies often pay less attention on influence multiple climatic factors temporal effects (lag accumulation) photosynthesis, thereby underestimating their impact. This study utilizes a dataset comprising Solar-induced chlorophyll fluorescence (SIF) data (GOSIF product), MODIS Land Cover product (MCD12C1), various variables. Analytical methods including Theil-Sen Median trend analysis, Mann-Kendall test, partial correlation optimal parameter-based geographical detector (OPGD) model were employed to explore dynamics SIF responses identify drivers China. The findings indicate that (1) as indicated by SIF, exhibited an increasing majority Chinese regions, which constitute over 80 % area, with particularly pronounced enhancements southern central western parts subtropics. (2) Soil moisture primarily exhibits lag evergreen needleleaf forests, deciduous broadleaf mixed whereas temperature does not exhibit significant effects. Solar radiation vapor pressure deficits impact through both accumulation Under effects, proportion correlations between increases 36.71 ∼ 43.8 %, excluding temperature. (3) Temperature dominant factor affecting forest. Interactions have significantly stronger than individual factors. Notably, explanatory power deficit substantially when it interacts other Studying aids accurately predicting change, improving accuracy global carbon cycle models guiding development sequestration management strategies.

Language: Английский

Citations

3
Capturing information about the nonlinear impact between droughts and vegetation dynamics based on nonlinear dynamical system theory DOI
Yiyang Zhao, Zhaoqiang Zhou, Zhaodan Cao

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 643, P. 132011 - 132011

Published: Sept. 16, 2024

Language: Английский

Citations

2
Characteristics of Vegetation Photosynthesis under Flash Droughts in the Major Agricultural Areas of Southern China DOI Creative Commons
Yuqing Zhang,

Feng‐Wu Liu,

Taizheng Liu

et al.

Atmosphere, Journal Year: 2024, Volume and Issue: 15(8), P. 886 - 886

Published: July 25, 2024

Flash droughts adversely affect agriculture and ecosystems due to their rapid depletion of soil moisture (SM). However, few studies assessed the impacts flash on crops, especially in agricultural regions southern China. In this study, we investigated using crop root zone SM main region Additionally, solar-induced chlorophyll fluorescence (SIF) served as a vegetation index explore response droughts. The results reveal that SIF exhibited an upward trend from 2001 2020 study area, indicating enhanced photosynthetic capacity crops subsequent yield improvement. Hotspots drought frequency occurred eastern areas both upper lower Yangtze River regions, specifically where most types were particularly prevalent. average duration was 6–12 pentads, sufficiently long significantly hinder photosynthesis, resulting negative standardized anomalies. area affected by presented downward during 2001–2020, with longest recent decade, 2019, 2010, 2013. time >80% <2 respectively, have high sensitivity northern part middle southwestern southeastern parts South China region, mean values anomalies than −0.5 droughts, suggesting these severely During late summer experienced precipitation shortage coupled evapotranspiration capacity. This unfavorable combination meteorological conditions can quickly lead substantial SM, ultimately triggering be devastating for crops. Our findings enhance understanding well provide early warning signals farmers make appropriate mitigation strategies.

Language: Английский

Citations

1
Impact of Extreme Drought on Vegetation Greenness in Poyang Lake Wetland DOI Open Access

Xiahua Lai,

Han Zeng, Xiaomin Zhao

et al.

Forests, Journal Year: 2024, Volume and Issue: 15(10), P. 1756 - 1756

Published: Oct. 6, 2024

The Poyang Lake Wetland, an internationally significant ecosystem, frequently experiences drought during the flood season. However, total impact of extreme on wetland vegetation remains poorly understood. This study determined standardised precipitation evapotranspiration index (SPEI) and analysed trends within Basin. Additionally, spatiotemporal variations in under conditions were examined by analysing mean normalised difference (NDVI) values categorising NDVI classifications. key factors affecting its respective thresholds determined. Basin has experienced increasing aridity over past 3 years. In response to this trend, area expanded, whereas greenness declined. Notably, year following drought, Lake’s was lower than that same period previous Regardless, correlation analysis showed no relationship between SPEI greenness; however, water level changes significantly impacted vegetation, with a coefficient −0.89 (p < 0.001). A critical 14 m identified as threshold at which sudden observed. research offers valuable insights into hydrological management strategies protect Wetland’s conditions. Future studies should enhance differentiation tolerance among different plant species, thereby achieving differentiated management.

Language: Английский

Citations

1
Study on the Characteristics of Flash Drought and the Response Regularity of Photosynthesis to Flash Drought in Different Vegetation Ecosystems in the Middle and Lower Reaches of the Yangtze River Basin. DOI Creative Commons
Yunjun Zhan,

Chuanqi Ma,

Yan Yan

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 17, 2024

Abstract In recent decades, flash drought events have frequently occurred in the humid regions of southern China. Due to sudden onset and rapid intensification these droughts, they often cause severe damage vegetation photosynthesis. Our current understanding spatiotemporal evolution characteristics droughts across different types remains limited. Moreover, insufficient consideration early stress during has constrained our response regularity photosynthesis events. This study analyzes spatial temporal for middle lower reaches Yangtze River Basin from 2000 2023. Using event 2013 as a case study, solar-induced chlorophyll fluorescence (SIF) yield (ΦF) were employed further explore Response Regularity drought. The results show that, over past 24 years, frequency decreased, but total duration increased, with forests experiencing higher Cropland is most sensitive drought, responding on 10th day after reaching negative anomaly by 26th day. Forests grasslands respond later, beginning 20th showing 36th findings this contribute deeper responses provide reference developing effective management strategies.

Language: Английский

Citations

0