From meteorological to agricultural drought: Propagation time and influencing factors over diverse underlying surfaces based on CNN-LSTM model

Ecological Informatics, Journal Year: 2024, Volume and Issue: 82, P. 102681 - 102681

Published: June 17, 2024

As global warming intensifies and extreme weather events become more frequent, the severity of drought conditions in China's Xinjiang region has escalated. This exacerbates socio-economic pressures area presents increasingly formidable challenges for future. In response to these challenges, researching phenomena is imperative. study employs Bayesian methods copula functions estimate propagation time. It utilizes a hybrid deep learning model (CNN-LSTM) analyze process its influencing factors across four land cover types: crops, forest land, grassland, unused land. The findings indicate that Cropland experiences longest average time (5.27 months), while forests have shortest duration (4.2 months). Unused grassland exhibit similar durations (4.8 On an annual scale, each type manifests two phases: from January May June December. former phase shows ranging 6 9 months, latter ranges 1 5 months; both demonstrate increasing trend over Seasonally, all Land Cover Types pattern shorter times summer autumn compared with winter spring. Moreover, longer correlates greater disparity between meteorological resultant agricultural severity. analyzing influence on propagation, soil moisture content El Niño-Southern Oscillation(ENSO) were found significantly impact Types, progressively strengthening their years.

Language: Английский

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Urbanized lands degrade surrounding grasslands by deteriorating the interactions between plants and soil microbiome

Frontiers in Microbiology, Journal Year: 2025, Volume and Issue: 15

Published: Jan. 6, 2025

To mitigate overgrazing on grasslands, towns were constructed in some pastoral regions of China to relocate pastoralists. Nevertheless, whether and how the urbanized lands impact surrounding grassland ecosystem remains unclear. We assessed impacts plant soil interactions within grasslands order ensure an eco-sustainable pastoralist relocation. The town with 1 km radius was selected as urbanization sample a nature sample. Plants investigated (NG), areas (T-1 km), 2 (T-2 3 (T-3 km) from center town. In T-1 T-2 km, compared NG, diversity, abundance dominant species, wood saprotroph fungi, water content (SWC), total organic carbon (TOC) decreased, while pathogen pH, phosphatase (TP) increased. Conversely, no such changes observed T-3 km. results Mantel test Partial least squares path model suggest that decrease TOC SWC, along increase pH TP lead decline fungi ultimately resulting reductions diversity species. These indicate can degradation by deteriorating plant-soil interactions.

Language: Английский

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Spatiotemporal Responses and Vulnerability of Vegetation to Drought in the Ili River Transboundary Basin: A Comprehensive Analysis Based on Copula Theory, SPEI, and NDVI

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(5), P. 801 - 801

Published: Feb. 25, 2025

The Ili River Transboundary Basin is an important area within the Belt and Road Initiative, its ecological security impacts China–Kazakhstan diplomatic relations building of Initiative. Using copula method, this study quantifies vulnerability vegetation to drought in based on Normalized Difference Vegetation Index (NDVI) Standardized Precipitation Evapotranspiration (SPEI). highest June, with proportion highly vulnerable areas reaching 63.29% under extreme conditions. As severity increases, probability loss rises, being affected most June. From May drought-prone are mainly located Almaty Oblast East Kazakhstan. July September, found Valley southeastern Oblast. Rainfed croplands susceptible drought, while, for irrigated croplands, higher enhances mitigating effect irrigation measures. by semi-arid regions, particularly summer. These findings offer valuable scientific support management sustainable development region.

Language: Английский

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Assessing drought risk of grassland ecosystem in Hulunbuir, China

Ecological Indicators, Journal Year: 2025, Volume and Issue: 175, P. 113522 - 113522

Published: April 29, 2025

Language: Английский

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Warming Mitigates the Impacts of Degradation on Nitrogen Allocation between Soil Microbes and Plants in Alpine Meadow

Agronomy, Journal Year: 2024, Volume and Issue: 14(3), P. 508 - 508

Published: Feb. 29, 2024

In alpine meadows, plants and soil microbes typically engage in competition for nitrogen (N) under N-deficient conditions. However, the acquisition distribution of N among meadow degradation climate warming induced by global change are still uncharacterized. this study, we isotope labeled inorganic (NH4+-15N, NO3−-15N) organic (glycine-15N) both degraded non-degraded plots using open-top chambers (OTC) to mimic increasing air temperatures. After 6 h, 15N contents were measured investigate effects rising temperature on allocations ecosystems studied. Results showed that significantly reduced microbial accumulation 52% compared those plots. plots, lowered levels 49%, whereas ones, it NH4+-15N NO3−-15N recovery 80% 45% average but increased glycine-15N 653%. Meanwhile, decreased plant 75% Conversely, markedly 40% 114%. Warming mitigates allocation plants. unwarmed elevated total ratio 60%. warmed impact was reduced. The responses temperatures closely related quality. areas, enhanced 165% 66%. 66% 232%. This indicates can increase carbon limitation restoration meadows should prioritize restoring accumulation.

Language: Английский

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Assessment and Multiscenario Simulation of Land Use and Ecosystem Services Interactions in Inner Mongolia

Land Degradation and Development, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 22, 2024

ABSTRACT Balancing land development and ecological protection poses significant challenges for sustainable in arid semi‐arid regions like Inner Mongolia. This study uses the integrated valuation of ecosystem services (ESs) trade‐offs model patch‐generated land‐use simulation to analyze impacts land‐use/cover (LULC) changes on ESs from 2005 2020 simulate scenarios 2035. The results show that (1) governance efforts improved comprehensive index (CEI), habitat quality, soil conservation capacity but led a decrease annual water yield (AWY) eastern region. Additionally, conversion grassland forest construction farmland caused slight declines carbon sequestration increased nitrogen export. (2) external driving factors different vary, internal relationships within have also changed. Notably, LULC transformed synergy between AWY quality into trade‐off relationship after 2010 due grassland. (3) Among five scenarios, scenario combined with zonal management strategies can achieve goals economic growth, protection, food security. clarifies affecting Mongolia provides scientific basis future policies. It fills gap spatiotemporal under multiple this These findings offer valuable references promoting similar regions, highlighting importance integrating multi‐objective adaptive practices balance objectives.

Language: Английский

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Dynamic response of vegetation to meteorological drought and driving mechanisms in Mongolian Plateau

Journal of Hydrology, Journal Year: 2024, Volume and Issue: unknown, P. 132541 - 132541

Published: Dec. 1, 2024

Language: Английский

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