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Origin and evolution of signaling pathways responsible for ascorbic acid synthesis and catabolism during plant terrestrialization 认领 引用
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作者 Li-Yao Su Zheng-Tai Liu +4 位作者 Pei-Yan Chen Xi-Liang Wang Hui Liu Jin-Song Xiong Ai-Sheng Xiong 《Horticulture Research》 SCIE CSCD 2025年第10期163-173,共11页
This study comprehensively reveals the origin and evolution mechanisms of ascorbic acid(AsA)synthesis and breakdown pathways during plants'transition from water to land.By analyzing genomic data from 21 key plant ... This study comprehensively reveals the origin and evolution mechanisms of ascorbic acid(AsA)synthesis and breakdown pathways during plants'transition from water to land.By analyzing genomic data from 21 key plant species and transcriptomic data from the One Thousand Plants transcription project,we found that the L-galactose pathway emerged in green algae,with variations in the HIT domain of the rate-limiting enzyme GGP driving adaptive divergence between lower and higher plants.The galacturonic acid pathway integrated with the L-galactose pathway through the emergence of GalUR in bryophytes.The myo-inositol pathway became complete in bryophytes,and its refinement likely promoted dehydration adaptation via oxidative protection.The AsA recycling pathway(APX/MDHAR/DHAR)originated in red algae,while the appearance of AO enzymes is significantly related to rising oxygen levels during land colonization.Statistical analysis of 218 plant species shows that AsA content increases significantly with evolution,in line with heightened light and oxygen stress.This study explains the dynamic evolution of the AsA metabolic network during plant terrestrialization,highlighting how key gene families(e.g.GGP,GalUR,GLOase)undergo functional and structural domain divergence to boost antioxidant capacity and thus facilitate adaptation to terrestrial life.These findings offer a theoretical basis for improving crop stress resistance. 展开更多
关键词 ascorbic acid catabolism l galactose pathway green algaewith genomic data galacturonic acid pathway ascorbic acid synthesis plant terrestrialization transcriptomic data
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Re-terrestrialization in the phylogeny of epiphytic plant lineages:Microsoroid ferns as a case study 认领 引用 被引量：2
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作者 Chi-Chuan Chen Jaakko Hyvönen Harald Schneider 《Journal of Systematics and Evolution》 SCIE CAS CSCD 2023年第4期613-626,共14页
The fern family Polypodiaceae,with over 1600 species,is not only one of the most species-rich families of ferns,but also a major contributor to the vascular epiphytic diversity throughout the tropics.Although the vast... The fern family Polypodiaceae,with over 1600 species,is not only one of the most species-rich families of ferns,but also a major contributor to the vascular epiphytic diversity throughout the tropics.Although the vast majority of species belonging to this family prefer to grow as epiphytes,several species colonize successfully rheophytic,lithophytic,and even terrestrial habitats.Here,we explore the hypothesis that non-epiphytic habitat preferences,including terrestrial growth,evolved secondarily with epiphytes being the plesiomorphic habitat preference.The results of phylogenetic analyses,based on dense taxon sampling and four chloroplast DNA regions,were integrated with divergence time estimates and ancestral character state reconstructions to test these predictions.Both fossils and secondary calibration data were incorporated to obtain divergence time estimations.The results support the prediction of multiple transitions from epiphytic/lithophytic to terrestrialheophytic habitats occurring mainly in the Microsoreae lineage.The change in niche preferences coincides with niche colonization opportunities created by climatic fluctuations and geographical changes during the Oligocene and Miocene periods. 展开更多
关键词 ancestral state reconstruction divergence time epiphyte fern Microsoreae re‐terrestrialization
Functional evolution and rewiring of the UVR8-BES1/BIM1 module underpin the refinement of UV-B responses during plant terrestrialization 认领 引用
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作者 Chengjuan Cao Runjie Diao +7 位作者 Mengru Zhao Qiuting Ji Jingwen Wang Zilong Xu Wenhui Xie Yujun Zhou Zhenhua Zhang Bojian Zhong 《Plant Communications》 SCIE CSCD 2026年第6期252-266,共15页
The UVR8-BES1/BIM1-mediated crosstalk between UV-B and brassinosteroid(BR)signaling orchestrates transcriptional reprogramming and thereby coordinates BR-mediated growth and UV-B responses in flowering plants.However,... The UVR8-BES1/BIM1-mediated crosstalk between UV-B and brassinosteroid(BR)signaling orchestrates transcriptional reprogramming and thereby coordinates BR-mediated growth and UV-B responses in flowering plants.However,when the UVR8-BES1/BIM1 module originated and how this transcriptional regulatory network evolved in plants remain largely unknown.Here,we traced the evolutionary trajectory of the UVR8-BES1/BIM1 module using a structure-guided approach that integrates homology modeling and structural alignment across major plant lineages.By integrating protein interaction modeling,transcriptome profiling,and genome-wide binding analyses,we elucidated the functional evolution of the UVR8-BES1/BIM1 module driven by structural innovations and genetic co-option.Our results reveal that UVR8 and BIM1 orthologs originated in the last common ancestor(LCA)of chlorophytes and maintained a conserved interaction in green plants,whereas BES1 orthologs emerged in the LCA of streptophyte algae and acquired the capacity to interact with UVR8 in vascular plants.BIM1 served as a core UV-B-responsive transcription factor in the LCA of green plants.By contrast,BES1 initially participated in UV-B signaling through a BIM1-dependent mechanism in the LCA of land plants and later evolved to function as a dominant integrator within UV-B-BR crosstalk in angiosperms.The expansion of the BES1 regulatory network and its binding specificity largely parallels the elaboration of UV-B transcriptional programs during land plant evolution.Our study thus demonstrates that the functional evolution of the UVR8-BES1/BIM1 module enables the stepwise integration of UV-B and BR signaling in green plants,advancing our understanding of how plants have wired hormonal and environmental signals to adapt to terrestrial habitats. 展开更多
关键词 UVR8-BES1/BIM1 module UV-B signaling plant terrestrialization functional evolution regulatory networks
Genome of aerial alga Trentepohlia odorata reveals insights into the evolution of terrestrial lifestyle in green algae 认领 引用
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作者 Yuanhao Li Jiao Fang +8 位作者 Xiaoya Ma Hao Wang Shiyu Zhang Yu Peng Lin Chen Guoxiang Liu Huan Zhu Zhenhua Zhang Bojian Zhong 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2026年第3期433-446,共14页
Trentepohliales is a completely terrestrial order within Ulvophyceae(the core Chlorophyta),and its closely related lineages are mainly marine macroalgae(green seaweeds).Despite the considerable interest in their biote... Trentepohliales is a completely terrestrial order within Ulvophyceae(the core Chlorophyta),and its closely related lineages are mainly marine macroalgae(green seaweeds).Despite the considerable interest in their biotechnological potential,little is known about their adaptations to challenging terrestrial habitats.Here,we assemble the high-quality reference genome of Trentepohlia odorata.This alga shows duplications of key genes associated with lipid metabolism and carotenoid synthesis,potentially facilitating intracellular accumulation of lipid droplets and carotenoids.We further reveal positive selection and expansion of gene families involved in vesicle trafficking and cell division regulation in T.odorata compared with other algae(cleavage furrow-mediated cell division)in Ulvophyceae,providing a genetic foundation for the evolution of phragmoplast-mediated cell division.The combined C4-like and biophysical CO2-concentrating mechanisms(CCMs)of T.odorata enable adaptation to fluctuating CO2 environments,and support efficient photosynthesis under CO2-limited conditions.Adaptive strategies of T.odorata to terrestrial stressors,such as drought,intense light,and UV-B radiation,include horizontally acquired genes involved in cell wall synthesis and remodeling,homeostasis of aldehydes,and expanded genes associated with reactive oxygen species(ROS),DNA repair,and photoprotection.Our study provides a valuable genomic resource for studying aerial algae and improves understanding of plant terrestrialization. 展开更多
关键词 Plant terrestrialization Aerial green alga Environmental adaptation Trentepohliales Comparative genomics
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Intelligent characterization of discontinuities and heterogeneity evaluation of potential hazard sources in high-steep rock slope by TLS-UAV technology 认领 引用 被引量：2
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作者 Changqing Liu Han Bao +5 位作者 Tianyi Wang Jingfeng Zhang Hengxing Lan Shengwen Qi Wei Yuan Shunichi Koshimura 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第1期509-527,共19页
The identification of rock mass hazard sources is fundamental for preventing rockfall and landslide disasters in mountainous regions,with rock mass structural characteristics playing a vital role in hazard assessment.... The identification of rock mass hazard sources is fundamental for preventing rockfall and landslide disasters in mountainous regions,with rock mass structural characteristics playing a vital role in hazard assessment.In this study,terrestrial laser scanning(TLS)and unmanned aerial vehicle(UAV)technologies were integrated to enhance the evaluation methodology for rock mass hazard sources,focusing on the Sichuan Yanjiang Expressway project in China.The findings demonstrate that TLS-UAV technology enhanced both spatial coverage and data density in slope modeling.Through integrated algorithmic analysis,rock discontinuities within heterogeneous datasets were systematically identified,enabling quantitative extraction and statistical analysis of key geometric parameters,including orientation,trace length,spacing,and roughness.Furthermore,quantitative models were developed for cohesion,friction angle and the morphology parameter M of in situ discontinuities,respectively,facilitating efficient mechanical parameter acquisition.A novel rock mass hazard index(RHI)was developed incorporating discontinuity geometric rating(DGR),discontinuity mechanical rating(DMR),and slope mass rating(SMR).Field validation confirmed the methodology's effectiveness in evaluating risk levels and spatial heterogeneity of rock mass hazard sources,revealing the contribution of different discontinuity sets to the rock mass hazard and identifying the primary discontinuity sets controlling instability mechanisms.This study is of great significance for evaluating discontinuity-controlled rock mass hazard sources and preventing rockfall disasters. 展开更多
关键词 High-steep slope Rock mass hazard source Discontinuities Intelligent characterization Terrestrial laser scanning(TLS) Unmanned aerial vehicle(UAV)
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Disservices in terrestrial and freshwater ecosystems.The negative side of the ecosystems 认领 引用 被引量：1
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作者 Paulo Pereira Emoke Dalma Kovacs +2 位作者 Melinda Haydee Kovacs Miguel Inácio Wenwu Zhao 《Geography and Sustainability》 CSCD 2026年第2期1-6,共6页
1.Background Ecosystems supply a wide range of goods and services.This has been an important research topic for decades,and numerous works have argued that ecosystems are key to human wellbeing(Pinto et al.,2022).The ... 1.Background Ecosystems supply a wide range of goods and services.This has been an important research topic for decades,and numerous works have argued that ecosystems are key to human wellbeing(Pinto et al.,2022).The ecosystem services(ES)concept emerged from the idea that humans depend on the environment and is defined as the bene fits people obtain from ecosystems(MEA,2005).Although there are different classifications,ES are normally divided into Regulating,Pro visioning,and Cultural. 展开更多
关键词 human wellbeing goods services terrestrial ecosystems bene fits people obtain ecosystem services concept freshwater ecosystems ecosystem services negative impacts
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Occurrence of microplastics in terrestrial habitats:Hazards and pollution abatement 认领 引用 被引量：1
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作者 Babalola Aisosa ONI Kingsley Chukwunonso AGU Samuel Eshorame SANNI 《Pedosphere》 SCIE CAS CSCD 2026年第1期317-341,共25页
Microplastics(MPs)are ubiquitous and pose an environmental risk.This review examined MP pollution in terrestrial ecosystems from a myriad of poorly understood sources.Knowledge regarding the occurrence sources,migrati... Microplastics(MPs)are ubiquitous and pose an environmental risk.This review examined MP pollution in terrestrial ecosystems from a myriad of poorly understood sources.Knowledge regarding the occurrence sources,migration behaviors,ecotoxicology,absorption mechanisms,and effects of MPs has also been fully summarized.Microplastics interact with contaminants,such as antibiotics,pesticides,heavy metals,etc.,and may act as vectors for contaminant transfer in terrestrial ecosystems.The transportation and retention of MPs in soil are governed by interactions among their inherent properties,such as size,shape,surface charge,and density.Interestingly,MP migration into soil is lacking research.The MPs and nanoplastics were also found in edible fruits and vegetables.The MP contamination in soil affects ecosystems,causing soil structure changes,fertility reduction,and pollutant leaching into groundwater.The MP concentration lies in the range of 43-2443 and 40-43000 items kg-1in agricultural and urban soils,respectively.This review provides a comprehensive roadmap for future research and a framework for soil MP risk assessment.Future studies on the uptake,accumulation,and translocation of MPs and their associated toxins by plants are essential for evaluating their risks to food security and human health.Research on MPs in terrestrial habitats lacks comprehensive data on their long-term persistence,degradation pathways,and interactions with soil components under varying environmental conditions.Additionally,limited understanding exists regarding MP impacts on soil biodiversity,pollutant mobility,and plant uptake,highlighting the need for innovative detection methods and effective pollution abatement strategies. 展开更多
关键词 contaminant ecological risk macroplastics nanoplastics plastic mulch risk assessment sludge terrestrial ecosystem
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Origin and Evolution of Core Components Responsible for Monitoring Light Environment Changes during Plant Terrestrialization 认领 引用 被引量：17
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作者 Xue Han Xin Chang +4 位作者 Zhenhua Zhang Haodong Chen Hang He Bojian Zhong Xing Wang Deng 《Molecular Plant》 SCIE CSCD 2019年第6期847-862,共16页
Light serves as the source of energy as well as an information signal for photosynthetic plants. During evolution, plants have acquired the ability to monitor environmental light radiation and adjust their development... Light serves as the source of energy as well as an information signal for photosynthetic plants. During evolution, plants have acquired the ability to monitor environmental light radiation and adjust their developmental patterns to optimally utilize light energy for photosynthesis. The mechanisms of light perception and signal transduction have been comprehensively studied in past decades, mostly in a few model plants, including Arabidopsis thaliana. However, systematic analyses of the origin and evolution of core components involved in light perception and signaling are still lacking. In this study, we took advantage of the recently sequenced genomes and transcriptomes covering all the main Archaeplastida clades in the public domain to identify orthologous genes of core components involved in light perception and signaling and to reconstruct their evolutionary history. Our analyses suggested that acclimation to different distribution of light quality in new environments led to the origination of specific light signaling pathways in plants. The UVR8 (UV Resistance Locus 8) signaling pathway originated during the movement of plants from the deeper sea to shallow water and enabled plants to deal with ultraviolet B light (UV-B). After acquisition of UV-B adaptation, origination of the phytochrome signaling pathway helped plants to colonize water surface where red light became the prominent light energy source. The seedling emergence pathway, which is mediated by a combination of light and phytohormone signals that orchestrate plant growth pattern transitions, originated before the emergence of seed plants. Although cryptochromes and some key components of E3 ubiquitin ligase systems already existed before the divergence of the plant and animal kingdoms, the coevolution and optimization of light perception and downstream signal transduction components, including key transcription factors and E3 ubiquitin ligase systems, are evident during plant terrestrialization. 展开更多
关键词 evolution UVR8 signaling pathway phytochrome signaling pathway seedling emergence pathway COP1/SPA complex plant terrestrialization
Geological features and exploration potential of shale oil in Jiuquan Basin,NW China 认领 引用
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作者 XIAO Wenhua WEI Deqiang +9 位作者 LIU Xinze ZHAO Jun DONG Zhenyu REN Panliang MAO Chaojie YANG Peilin ZHANG Xue LI Tiefeng ZHANG Haojin ZHANG Pengpeng 《Petroleum Exploration and Development》 SCIE 2026年第1期138-151,共14页
This paper systematically analyzes the reservoir-forming characteristics and cretaceous shale oil types in four major hydrocarbon-generating sags(Qingxi,Ying'er,Huahai,and Shida)of the Jiuquan Basin,based on the d... This paper systematically analyzes the reservoir-forming characteristics and cretaceous shale oil types in four major hydrocarbon-generating sags(Qingxi,Ying'er,Huahai,and Shida)of the Jiuquan Basin,based on the data of experiments for microscopic and geochemical analysis of reservoirs.The hydrothermal alteration-induced reservoir-forming model and its reservoir-controlling effect in the Qingxi Sag are discussed,and the exploration potential of shale oil in these four sags are evaluated.(1)The Qingxi Sag is widely developed with mud shale,dolomitic shale,and laminated argillaceous dolomite in the Cretaceous,which can be defined as mixed shale as a whole.The source rocks in this area are of good quality and high maturity,formed in a saline water sedimentary environment,and rich in dolomite,with a strong hydrocarbon generation capacity and excellent oil generation conditions.The reservoir space has been significantly modified by hydrothermal process,with well-developed dissolution pores and microfractures,recording favorable reservoir conditions for shale oil enrichment.Overall,this sag has large reservoir thickness and large resource volume,making it the most realistic shale oil exploration target in the Jiuquan Basin.However,it faces challenges such as great burial depth(deeper than 4500 m)and strong tectonic stress.(2)The Ying'er,Huahai,and Shida sags all feature sand-mud interbeds consisting of fan delta front thin sandbodies and lacustrine mud shale in the Cretaceous,having good source rock quality and favorable conditions for interbedded-type shale oil accumulation.The source rocks are insufficient in thermal evolution degree and unevenly distributed,and favorable shale oil resources are mainly endowed near the center of the sags.Reservoirs are primarily composed of siltstone to fine sandstone,suggesting relatively good reservoir conditions,generally with small burial depth(3000-4000 m)and the possibility of local sweet spots.It is noted that the Ying'er Sag has already produced low-mature to mature oil,qualifying it as a near-term realistic shale oil exploration area. 展开更多
关键词 Jiuquan Basin Qingxi Sag Cretaceous fault basin source rock hydrothermal alteration terrestrial shale oil
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Heterogeneous effects of aerosols on terrestrial ecosystems in China 认领 引用
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作者 Xiuting Lai Hao Fan +3 位作者 Yanhong Jia Shiyu Zhang Jiayun Qi Xu Wang 《Forest Ecosystems》 SCIE CAS CSCD 2026年第3期607-618,共12页
Ecological impacts of aerosols on vegetation remain highly uncertain due to their capacity for both modifying radiation and causing phytotoxic damage.China has experienced the most rapid air quality improvement global... Ecological impacts of aerosols on vegetation remain highly uncertain due to their capacity for both modifying radiation and causing phytotoxic damage.China has experienced the most rapid air quality improvement globally since 2013,yet the ecosystem consequences of this governance are poorly quantified.Here,we analyzed satellite observations and reanalysis data from multiple sources covering a long period to investigate the spatiotemporal intereactions between aerosols and vegetation across China.By employing generalized linear mixed models(GLMM),we isolated the independent and relative contributions of aerosol optical depth(AOD)to vegetation dynamics.Our results reveal a pronounced divergence between the north and south:AOD suppresses vegetation growth in southern China with limited radiation,while in regions limited by water availability,it likely enhances water use efficiency and productivity by reducing surface radiation and vapor pressure deficit(VPD),thereby curtailing transpiration water loss.The impacts exhibited diverse patterns across species:nee-dleleaf forests,meadows,wetlands,and shrublands demonstrated heightened vulnerability to aerosol suppres-sion,whereas needleleaf and broadleaf mixed forests uniquely benefited from increased diffuse radiation.Notably,the gross primary productivity(GPP)of steppe ecosystems underwent a fundamental shift from a negative to a positive response to aerosols after 2013,highlighting the dynamic interactions between aerosols and ecosystems that were specific to the environment.Crucially,the GLMM quantified a significant weakening of the aerosol suppression effect after the implementation of clean air policies,with its standardized negative co-efficient on GPP declining from 0.16 to 0.10.This study provides observational evidence on a large scale that improving air quality not only alleviates environmental stress but also directly promotes ecosystem function,offering critical insights for assessing carbon neutrality policies. 展开更多
关键词 Aerosol Terrestrial ecosystem Vegetation greenness Vegetation productivity China
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Assessing humus to predict soil organic carbon in Northwest China:A case study of Ningxia 认领 引用
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作者 Xinnian GUO Zhuonan HOU +4 位作者 Xia WU Huaiyu LONG Zehua XU Baiyun LI Shaoshan AN 《Pedosphere》 SCIE CAS CSCD 2026年第3期683-692,共10页
The spatial distribution and influencing factors of soil organic carbon(SOC),closely related to climate change and global carbon(C)cycling,have received widespread attention.As an important component of the SOC pool,h... The spatial distribution and influencing factors of soil organic carbon(SOC),closely related to climate change and global carbon(C)cycling,have received widespread attention.As an important component of the SOC pool,humus is vital to soil C turnover and levels.However,humus parameters are rarely used to predict SOC in terrestrial ecosystems,presumably due to the evolving understanding of SOC sources and fractions.Here,we measured the levels of SOC,fulvic acid C(FAC),and humic acid C(HAC)in the topsoil(0-20 cm)and subsoil(20-40 cm)of cropland,desert,forest,and grassland in Ningxia,Northwest China,and integrated humus and environmental factors to predict the SOC prediction models.The SOC,HAC,and FAC generally decreased with soil depth and showed a trend of forest>cropland>grassland>desert.The contribution of humus C(i.e.,HAC+FAC)to SOC was higher in forest(47.6%)than in cropland(40.6%),desert(38.4%),and grassland(37.2%).In the 0-40 cm soil of all four ecosystems,the average content of FAC(1.61 g kg−1)was higher than that of HAC(0.88 g kg−1),and FAC(26.6%)contributed more to SOC compared to HAC(14.5%).The geoclimatic and soil physicochemical factors used to predict the SOC content were grouped into six categories:humus,nutrient,soil texture,geoclimate,mineral,and soil chemical property.Humus and nutrient had significant(P<0.05)and direct positive effects on SOC.Although the levels and predictors of SOC differed among ecosystems,FAC was a significant and common driver.Additionally,mineral and soil chemical property explained a large proportion of SOC variation,related to the chemical characteristics of humus.These findings indicated that SOC was highly humus-dependent and context-dependent,and integrating humus parameters had important implications for the prediction of SOC in terrestrial ecosystems. 展开更多
关键词 distribution pattern fulvic acid carbon humic acid carbon minerals soil nutrients soil chemical properties terrestrial ecosystems
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Risk analysis of cross-interface spillover of avian influenza between terrestrial bird and seabird hosts 认领 引用
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作者 Xiaomeng Liu Yuzhe Li +3 位作者 Jinwei Dong Yuxin Qiao Xia Li Xiangming Xiao 《Avian Research》 SCIE CAS CSCD 2026年第2期429-438,共10页
The emergence of avian inffllfluenza virus(AIVs)in seabird populations has intensiffiified in recent years,signaling a signiffiificant shift in host ecology and transmission dynamics.To address this,this study introdu... The emergence of avian inffllfluenza virus(AIVs)in seabird populations has intensiffiified in recent years,signaling a signiffiificant shift in host ecology and transmission dynamics.To address this,this study introduces the Terrestrial Bird-Seabird Co-occurrence Index(TSCI),a novel metric designed to assess the spatial and temporal cooccurrence between terrestrial bird and seabird AIV hosts.The TSCI demonstrates strong predictive performance(AUC=0.94),capturing over 84.10%of conffiifirmed seabirds AIV cases within global high-risk zones.Based on this,363 Mha of coastal wetlands(representing 2.44%of global land area)were identiffiified as high-risk terrestrial birds and seabirds contact interface,providing a robust tool for identifying high-risk zones of potential virus spillover at the“terrestrial birds and seabirds contact interface.”Our analysis highlights that temperate coastal regions,particularly in Europe,North America,and East Asia,exhibit high TSCI values.Wetland ecosystems serve as critical hotspots for virus spillover,emphasizing the need for habitat-speciffiific conservation and surveillance strategies.Our study offers a scalable tool to enhance targeted monitoring,guide resource allocation,and inform integrated policies for preventing zoonotic spillover from wild bird reservoirs under the One Health framework. 展开更多
关键词 Coastal zone Cross-interface spillover Host species richness One Health Seabirds AIV infection risk Terrestrial bird-seabird host co-occurrence Wetland ecosystems
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A scheme of terrestrial system of Pakistan and the utilization and protection of its natural resources 认领 引用
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作者 WU Shaohong XIN Keying +3 位作者 SU Fenghuan LIU Lulu JIANG Ning CUI Peng 《Journal of Geographical Sciences》 SCIE CSCD 2026年第6期1369-1400,共32页
The comprehensive pattern of the natural environment constitutes a complex system shaped by interactions among multiple natural elements,including geology,terrain,climate,hydrology,soil,and biodiversity.The regional s... The comprehensive pattern of the natural environment constitutes a complex system shaped by interactions among multiple natural elements,including geology,terrain,climate,hydrology,soil,and biodiversity.The regional structure that embodies this complexity is defined as the comprehensive natural terrestrial system.Consequently,this system provides an integrated perspective for understanding the overall characteristics of the natural environment and resources.Pakistan,with agriculture as its core economic sector,has a natural environment that is inherently linked to its topographic and climatic conditions.Its geographical environmental conditions are similar to those of China.Through analysis of Pakistan's geological,geomorphological,climatological,hydrological,and vegetation conditions,we adopted the methodology of China's comprehensive natural regionalization to establish a comprehensive natural terrestrial system scheme for Pakistan.Hierarchically,this scheme is divided into 3 major regions,5 temperature zones,8 humidity areas,and 23 natural regions.The scheme reveals the diversity of Pakistan's natural environment and its three-dimensional geographical zonality characteristics.Furthermore,this study analyzes the ecological advantages,constraints,and resource development potential of each regional unit and proposes targeted strategies for ecological conservation and socioeconomic development.The scheme provides a scientific basis for the sustainable socioeconomic development of Pakistan. 展开更多
关键词 comprehensive natural terrestrial system geographic zonality natural resources utilization and protection Pakistan
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Climatic drivers of summer run-of-river hydropower generation in the middle reaches of the Yangtze River Basin:Synergistic effects of subtropical westerly jet dynamics and transregional teleconnections 认领 引用
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作者 Huixin Li Ke Huang +2 位作者 Bo Sun Leiyi Hou Botao Zhou 《Atmospheric and Oceanic Science Letters》 CAS CSCD 2026年第4期1-7,共7页
Based on ERA5 reanalysis and CN05.1 gridded observational datasets,this study investigates key meteorological drivers and cross-seasonal mechanisms influencing summer(June–July–August)run-of-river(ROR)hydropower gen... Based on ERA5 reanalysis and CN05.1 gridded observational datasets,this study investigates key meteorological drivers and cross-seasonal mechanisms influencing summer(June–July–August)run-of-river(ROR)hydropower generation in the middle reaches of the Yangtze River Basin(MYRB).Results reveal synergistic regulation by the meridional displacement of the subtropical westerly jet(SWJ)and Pakistan convective activity through East Asian atmospheric circulation.Southward(northward)SWJ shifts coupled with weakened(intensified)Pakistan convection enhance(reduce)MYRB precipitation while lowering(elevating)temperatures,thereby increasing(decreasing)ROR hydropower generation.Precursor analysis identifies spring negative(positive)sea surface temperature anomalies in the northwestern Indian Ocean may strengthen(weaken)meridional thermal gradients,forcing corresponding SWJ displacements.Concurrently,Central Asian cooling(warming)in spring modifies the Arabian Sea–Central Asia pressure gradient,suppressing(enhancing)South Asian monsoon moisture transport to Pakistan.These oceanic–terrestrial thermal coupling mechanisms demonstrate significant predictability for MYRB hydropower variability. 展开更多
关键词 Run-of-river hydropower Subtropical westerly jet Pakistan convection Oceanic–terrestrial thermal forcing Middle reaches of Yangtze river basin
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Soil moisture governs the weakening response of transpiration fraction to leaf area index increase:A spatiotemporal analysis in China's Three-North region 认领 引用
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作者 Xiao Zhang Xinxiao Yu Guodong Jia 《Forest Ecosystems》 SCIE CAS CSCD 2026年第2期369-383,共15页
Accurately assessing vegetation-hydrology interactions is crucial for water resource management,especially amidst climate change and ecological restoration.Using remote sensing observations(MODIS LAI)and GLEAM model o... Accurately assessing vegetation-hydrology interactions is crucial for water resource management,especially amidst climate change and ecological restoration.Using remote sensing observations(MODIS LAI)and GLEAM model outputs(evapotranspiration components,soil moisture(SM))from 2000 to 2023 for China's Three-North(TN)region,we quantified the sensitivity of the transpiration fraction(TF,the ratio of transpiration to total evapotranspiration)to changes in leaf area index(LAI),denoted as θ=∂TF/∂LAI.We employed an analytical approach combining SM and vapor pressure deficit(VPD)trends to evaluate the mechanisms governingθ's response to increasing vegetation cover.Results show that while the TN region experienced a significant LAI increase(0.33 m²·m⁻²·decade⁻¹),driving a continuous TF rise(1.44%decade⁻¹),the sensitivity θ markedly decreased(−3.4%year⁻¹),accumulating a 32% decline over 24 years.This reveals a clear diminishing return of LAI increase on enhancing TF.Regional VPD remained stable,with opposing effects from rising temperature and atmospheric moisture largely cancelling out.Crucially,the decline inθwas primarily governed by SM dynamics;θdecreased most sharply under soil drying conditions(Δθ up to−8%),whereas sufficient soil wetting buffered the decline.Sensitivity also varied across different combinations of SM and VPD trends,being lowest where SM increased,and VPD decreased.This study demonstrates a weakening hydrological feedback to vegetation restoration in the TN region,highlighting soil moisture availability as the key constraint limiting the ecosystem's capacity to regulate water vapor fluxes.These findings provide a critical basis for assessing ecological sustainability and informing adaptive water management strategies under future aridification. 展开更多
关键词 Vegetation transpiration Terrestrial evapotranspiration Leaf area index Soil moisture Vapor pressure deficit Three-North region
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Introduction to the Special Issue on Computer Modeling for Future Communications and Networks 认领 引用
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作者 Wenbing Zhao Pan Wang 《Computer Modeling in Engineering & Sciences》 SCIE EI 2026年第6期36-38,共3页
The next generation of global communication networks is expected to deliver a transformative leap in connectivity,transcending beyond terrestrial limitations to achieve truly ubiquitous coverage.Rather than operating ... The next generation of global communication networks is expected to deliver a transformative leap in connectivity,transcending beyond terrestrial limitations to achieve truly ubiquitous coverage.Rather than operating as fragmented regional systems,future infrastructures will leverage Satellite-Terrestrial Integrated Networks(STIN)and 6G technologies to form a unified global network. 展开更多
关键词 unified global network computer modeling networks global communication networks future communications g technologies regional systemsfuture satellite terrestrial integrated networks
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Space-Terrestrial Integrated 6G Network:Architecture,Networking,and Transmission Technologies 认领 引用
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作者 Kuang Linling Wang Jianxiu +1 位作者 Zhang Jianhua Wang Shuai 《China Communications》 SCIE EI CSCD 2026年第3期I0002-I0004,共3页
With the large-scale deployment of satellite constellations and the rapid advancement of technologies including artificial intelligence(AI)and non-terrestrial networks(NTNs),the integration of high,medium,and low Eart... With the large-scale deployment of satellite constellations and the rapid advancement of technologies including artificial intelligence(AI)and non-terrestrial networks(NTNs),the integration of high,medium,and low Earth orbit satellite networks with terrestrial networks has become a critical direction for future communication technologies.The objective is to develop a space-terrestrial integrated 6G network that ensures ubiquitous connectivity and seamless services,facilitating intelligent interconnection and collaborative symbiosis among humans,machines,and objects.This integration has become a central focus of global technological innovation. 展开更多
关键词 communication technologiesthe g network satellite constellations space terrestrial integrated g network terrestrial networks artificial intelligence ai intelligent interconnection satellite networks
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Chronic and acute acrylamide exposure on cell-type-specific neurotoxicity in bumblebee brain 认领 引用
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作者 Peijiong Wang Qiyao Yong +5 位作者 Huiling Liu Xiaohuan Mu Xiaofei Wang Fang Chen Hao Zheng Yiyuan Li 《Food Science and Human Wellness》 SCIE CAS CSCD 2026年第1期80-94,共15页
Acrylamide(AA)is a common carcinogen that affects the development and function of the central nervous system(CNS).At present,the toxic injuries of common AA are mainly divided into acute and chronic attacks,and the da... Acrylamide(AA)is a common carcinogen that affects the development and function of the central nervous system(CNS).At present,the toxic injuries of common AA are mainly divided into acute and chronic attacks,and the damage caused to the CNS is different.To investigate whether different doses of AA have different effects on brain cells,we performed single-nucleus RNA sequencing of the brain.The findings indicated that short-term high-dose(acute)AA directly disrupted protein synthesis and protein structure stability on the endoplasmic reticulum.Additionally,acute AA was observed to downregulate genes that inhibit apoptosis and autophagy,promote apoptosis,accelerate cell aging,and affect cell function in glial cells(Glia).Longterm low-dose(chronic)AA exposure elevated Ca2+concentration,increased protein autophosphorylation,and induced mitochondrial dysfunction,resulting in impaired axonal transport and disrupted metabolism of Kenyon cells(KCs).These findings highlight the cell type-specific effects of AA,where acute exposure disrupts Glia protein homeostasis,and chronic exposure impairs calcium signaling and axonal transport in KCs.Such results deepen our understanding of AA-induced neurotoxicity and lay the groundwork for developing targeted therapeutic strategies to mitigate its effects on the CNS. 展开更多
关键词 Acrylamide Neurotoxicity Bombus terrestris Single-nucleus RNA sequencing Kenyon cell Glia
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Distribution and Sources of Petroleum Hydrocarbons and n-Alkanes in Coastal Sediment Cores from the East China Sea 认领 引用
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作者 SUI Xiuqi WANG Jinyan +3 位作者 DONG Liang YU Meng LIU Xiting ZHUANG Guangchao 《Journal of Ocean University of China》 SCIE CAS CSCD 2026年第2期519-526,I0006-I0008,共8页
Petroleum hydrocarbons are traditional pollutants in coastal sedimentary environments,and the concentration of total petroleum hydrocarbons(TPH)has been used as a proxy to assess oil contamination in sediments.In this... Petroleum hydrocarbons are traditional pollutants in coastal sedimentary environments,and the concentration of total petroleum hydrocarbons(TPH)has been used as a proxy to assess oil contamination in sediments.In this study,we investigated the distribution of TPH and n-alkanes(n-C14-n-C34)along two ca.4 m sediment cores from the East China Sea(ECS)and further analyzed the n-alkane-based diagnostic parameters.The TPH concentrations(7.7-21.7μg/g,with an outlier of 60.3μg/g)indicated slight petroleum pollution at both sites.Among the hydrocarbons,higher abundances were observed for long-chain n-alkanes n-C29,n-C31and n-C33.The terrestrial n-alkanes accounted for 25%-33%of the total n-alkanes(n-C14to n-C34)based on the Terr/Total ratio.Multiple n-alkane diagnostic parameters,such as Carbon Preference Index(CPI)and Terrestrial to Aquatic Ratio(TAR),were higher in sediments at the site close to the Yangtze River Estuary,suggesting an elevated contribution of terrestrial organic matter due to significant riverine input.This finding is in agreement with the higher C/N ratio(7.3 to 7.7)and more negativeδ~(13)C values of TOC(-23.1‰to-22.5‰)at this site than the those of coastal site with increased marine organic matter impacted by upwellings(C/N:6.3 to 6.6;δ13C-TOC:-22.1‰to-21.8‰).In addition to the natural source of hydrocarbons,the lack of correlations between TOC and TPH indicates that other sources,such as anthropogenic discharge activities,may also contribute to the accumulation of petroleum hydrocarbons in coastal sediments.These results provided insight into the sources of petroleum hydrocarbons and n-alkanes in coastal sediments. 展开更多
关键词 TPH n-alkane diagnostic parameter petroleum pollution terrestrial input
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A review on solar-induced chlorophyll fluorescence of vegetation and its ecological process modeling 认领 引用
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作者 Jian Qin Zhuoying Deng +3 位作者 Shaoqiang Wang Jinghua Chen Pin Fu Chuobo Huang 《Ecological Frontiers》 CSCD 2026年第1期55-67,共13页
Accurately assessing the carbon sequestration capacity of forests is crucial for mitigating climate change.Traditional methods for estimating Gross Primary Productivity(GPP)of vegetation involve significant uncertaint... Accurately assessing the carbon sequestration capacity of forests is crucial for mitigating climate change.Traditional methods for estimating Gross Primary Productivity(GPP)of vegetation involve significant uncertainties.As a novel remote sensing approach,Solar-Induced chlorophyll Fluorescence(SIF)is directly related to photosynthesis and has demonstrated strong correlations with GPP across various ecosystems,climate zones,and spatial scales.Current GPP estimation methods based on SIF include Light Use Efficiency(LUE)models,the SCOPE process models,and the latest mechanistic light response(MLR)models.Future research should focus on improving the mechanistic understanding of SIF-related processes and promoting the integration of multi-source remote sensing data with SIF-based modeling to enhance the accuracy and universality of GPP estimation. 展开更多
关键词 Solar-induced chlorophyll fluorescence Process models Photosynthesis Gross primary productivity Flux Remote sensing Terrestrial ecosystems
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