Spatio-temporal patterns and climatic drivers of spring phenology in eight forest communities across the north-south transitional zone of China

Journal of Geographical Sciences, Journal Year: 2025, Volume and Issue: 35(1), P. 17 - 38

Published: Jan. 1, 2025

Language: Английский

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The Interaction Between Economic Development and Environmental Protection in Yunnan Province over the Past Two Decades

Sustainability, Journal Year: 2025, Volume and Issue: 17(3), P. 1031 - 1031

Published: Jan. 27, 2025

Over the past two decades, urbanization and industrialization in Yunnan Province have rapidly advanced, spurring economic growth but also leading to intensified environmental challenges, particularly urban areas where issues like air pollution declining vegetation cover become increasingly prominent. Balancing development protection has thus emerged as a core priority for Yunnan. This study quantifies analyzes temporal spatial changes, coupling coordination degree, driving factors underlying key indicators of Yunnan’s from 2000 2019. The results indicate that: (1) Economic is evident across all four types regions, though rates decelerated. first type region shows “U”-shaped trend FVC, second “W” trend, third fourth show consistent upward trend. (2) Overall between remains low Yunnan, with strong correlation degree levels: highest while lowest degree. (3) Industrial structure most influential factor (74.9%). Influencing differ by region: secondary industry predominates (24.4%), foreign investment leads (24.1%), technological innovation significantly impacts (23.9%), marketization drives (25.8%).

Language: Английский

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Forecasting climate risk and heat stress hazards in arid ecosystems: Machine learning and ensemble models for specific humidity prediction in Dammam, Saudi Arabia

Natural Hazards, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 18, 2025

Language: Английский

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Spatial and Temporal Change Characteristics and Climatic Drivers of Vegetation Productivity and Greenness during the 2001–2020 Growing Seasons on the Qinghai–Tibet Plateau

Land, Journal Year: 2024, Volume and Issue: 13(8), P. 1230 - 1230

Published: Aug. 7, 2024

Exploring NDVI variation and what drives it on the Qinghai–Tibet Plateau can strategically inform environmental protection efforts in light of global climate change. For this analysis, we obtained MODIS data collected during vegetative growing season, vegetation types for region, meteorological same period from 2001 to 2020. We performed Theil–Sen trend Mann–Kendall significance testing, spatial autocorrelation Hurst index calculation review spatiotemporal changes characteristics plateau various types. used correlation coefficients these analyses investigate how responds temperature precipitation. found following: (1) Overall, increased throughout multi-year with a much larger area improvement (65.68%) than degradation (8.83%). (2) The four main were all characterized by improvement, meadows (72.13%) comprising largest portion improved shrubs (18.17%) degraded area. (3) distribution had strong positive clustering effect was stable overall. local patterns primarily low–low high–high clustering. (4) an average value 0.46, indicating that sustainability is poor; is, change season large part future opposite past. (5) correlated positively air However, correlations varied geographically: wide influence, whereas precipitation mainly influenced grassland northern arid zone. overall temperature-driven stronger This finding consistent current research conclusion warming humidification promote growth high-altitude areas further emphasizes uniqueness as climate-change-sensitive study also offers technical foundation understanding impacts ecosystems, well formulating ecological strategies plateau.

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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Diversity and Functional Insights into Endophytic Fungi in Halophytes from West Ordos Desert Ecosystems

Journal of Fungi, Journal Year: 2025, Volume and Issue: 11(1), P. 30 - 30

Published: Jan. 4, 2025

Arid desert regions are among the harshest ecological environments on Earth. Halophytes, with their unique physiological characteristics and adaptability, have become dominant vegetation in these areas. Currently, research halophytes this region is relatively limited, particularly concerning studies related to root endophytic fungi, which been rarely reported on. Therefore, investigating diversity composition of fungi crucial for maintaining balance such an arid environment. This study focuses eight representative angiosperm from West Ordos Desert China (including Nitraria tangutorum, Salsola passerina, Suaeda glauca, Reaumuria trigyna, kaschgarica, Limonium aureum, Apocynum venetum, Tripolium vulgare), utilizing Illumina MiSeq high-throughput sequencing technology combined soil physicochemical factor data analyze diversity, composition, functions root-associated fungal communities. Ascomycota dominated most halophytes, recretohalophytes, where it accounted average 88.45%, while Basidiomycota was predominant glauca. A Circos analysis top 10 abundant genera revealed Fusarium, Dipodascus, Curvularia, Penicillium, other genera. Co-occurrence network showed significant differences networks across halophyte types, complex observed excreting characterized by highest number nodes connections, indicating tighter symbiotic relationships. In contrast, pseudohalophytes were simple, reflecting lower community cohesiveness. Redundancy (RDA) Mantel tests demonstrated that factors as organic matter, available sulfur, urease significantly influenced richness, evenness, suggesting properties play a critical role regulating fungal-plant symbiosis. Functional predictions indicated important roles metabolic pathways nucleotide biosynthesis, carbohydrate degradation, lipid metabolism, may enhance plant survival saline-alkaline environments. Furthermore, high abundance pathogens saprotrophs some communities suggests potential defense matter decomposition. The results provide reference advancing development utilization resources, applications ecosystem restoration cultivation.

Language: Английский

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Impacts of plant root traits and microbial functional attributes on soil respiration components in the desert-oasis ecotone

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

Published: Feb. 11, 2025

Dividing soil respiration (Rs) into autotrophic (Ra) and heterotrophic (Rh) represents a pivotal step in deciphering how Rs responds to environmental perturbations. Nevertheless, arid ecosystems beset by stress, the partitioning of underlying mechanisms through which microbial root traits govern distinct components remain poorly understood. This study was strategically designed investigate its (Ra Rh), properties, within desert-oasis ecotone (encompassing river bank, transitional zone, desert margin) northwest China. Employing metagenomics, we quantitatively characterized taxonomic attributes (i.e., composition) functional (specifically, genes implicated carbon metabolism). Field measurements during growing season 2019 unveiled pronounced decline rates along gradient from bank margin. The mean rate recorded as 1.82 ± 0.41 μmol m -2 s -1 at 0.49 0.15 meager 0.45 0.12 Concomitantly, Ra Rh exhibited similar trend throughout period, with emerging dominant driver Rs. Utilizing random forest modeling, unearthed significant associations between features components. Notably, both displayed robust positive correlations abundance phosphatidylinositol glycan A, key player metabolism. Partial least squares path modeling further elucidated that properties functions exerted direct influences on Rh, whereas failed register impact. When considering combined effects biotic abiotic factors, emerged linchpin dictating composition. Collectively, these findings suggest trait-based approach holds great promise more effectively revealing response composition changes, thereby offering novel vistas for future investigations cycling terrestrial soils.

Language: Английский

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Effects of Climate Change and Human Activities on Streamflow in Arid Alpine Water Source Regions: A Case Study of the Shiyang River, China

Land, Journal Year: 2024, Volume and Issue: 13(11), P. 1961 - 1961

Published: Nov. 20, 2024

Climate change and human activities were identified as the primary drivers of streamflow in arid alpine regions. However, limitations observational data have resulted a limited understanding changes these water sources, which hinders efforts to adapt ongoing climate formulate effective management policies. Here, we use four main tributaries upper reach Shiyang River China case study investigate long-term trends within quantifying individual contributions changes. The findings revealed that temperatures precipitation regions risen over past 40 years. Although warming trend has been significant, it slowed recent Nevertheless, three-quarters rivers are experiencing decline streamflow. land types watershed remain relatively stable, with cover (LUCC) primarily occurring Gulang watershed. significantly affected high rugged terrains, an influence exceeding 70%. For example, Jingta showed impact 118.79%, Zamu 84.00%, Huangyang 71.43%. Human-driven LUCC, such expansion cultivated urban land, led increased consumption, resulting reduced This effect is particularly pronounced low-lying gently undulating areas River, where LUCC account for 78.68% As intensify continue rise, further declines projected, highlighting urgent need resource management. These insights highlight targeted mitigation adaptation strategies confront scarcity challenges faced by vulnerable

Language: Английский

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The Spatiotemporal Evolution of Extreme Climate Indices in the Songnen Plain and Its Impact on Maize Yield

Agronomy, Journal Year: 2024, Volume and Issue: 14(9), P. 2128 - 2128

Published: Sept. 19, 2024

Global climate change is intensifying and extreme weather events are occurring frequently, with far-reaching impacts on agricultural production. The Songnen Plain, as an important maize production region in China, faces challenges posed by change. This study aims to explore the effects of extremes yield provide a scientific basis for adaptation agriculture this region. focuses spatial temporal evolution characteristics during reproductive period from 1988 2020 Plain their yield. Daily temperature precipitation data 11 meteorological stations were selected combined information assess trends indices using statistical methods such moving average Mann–Kendall (M-K) mutation test. Pearson correlation analysis random forest algorithm also used quantify degree influence results showed that (1) heat humidity (TN90p, TX90p, CWD, R95p, R10, SDII) tended increase, while cold (TN10p, TX10p) drought (CDD) decreasing trend, suggesting tends be warmer more humid. (2) pattern being higher north lower south west east, warm opposite, east west. (3). Both trend significant upward trend. Maize fluctuating downward within range −1.64~0.79 t/hm2. During 33 years, there three climatic abundance two failure rest years normal years. (4) index TN10p TN90p CWD significantly correlated yield, which had highest positive comprehensive analysis, importance was order TN90p, TN10p, CWD. demonstrates impact providing local management decision-making, helping formulate response strategies mitigate negative climate, ensure food security, promote sustainable development.

Language: Английский

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Response Mechanism and Simulation of Hydrological Processes to Environmental Change in Weihe River Basin

Published: Jan. 1, 2024

Climate dynamics and vegetation growth are indeed the primary factors that influence terrestrial hydrological processes. However, specific mechanisms by which these interact impact of processes not yet fully understood. This study developed a meteorological-vegetation Long Short-Term Memory (LSTM) model to forecast periodic changes in normalized difference index (NDVI) based on historical future meteorological data. A distributed was used simulate response water circulation environmental change Weihe River Basin. The results showed climate will be warmer wetter, increasing runoff hydrologic balance factors. were more influenced change. has stimulated an increase coverage, consequently leading decreases -1.78%, -1.7%, -2.4%, -7.4%, -2%, -0.4% runoff, percolation (PERC), surface (SURQ), groundwater flow (GWQ), yield (WYLD), lateral (LATQ), respectively. maximum actual evapotranspiration (ET) 0.4%. Although LAI had weaker effect cycle components, it also changed caused some extent. Due spatial variation climate, largest increases other except ET at sub-basin scale observed basin outlet Guanzhong plains PERC, GWQ, WYLD, LATQ lower than those northern plateau mountain ranges. considered combined impacts cover change, predicted trends growth, basin, quantified single evolution cycle.

Language: Английский

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