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Quantifying the interannual litterfall variations in China’s forest ecosystems

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Journal of Plant Ecology 2020年第3期13卷 266-272页

作者： Bingrui Jia Hongru Sun wenying yu Guangsheng Zhou State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China University of Chinese Academy of Sciences Beijing 100049China Institute of Atmospheric Environment China Meteorological AdministrationShenyang 110166China Chinese Academy of Meteorological Sciences Beijing 100081China

Aims Litterfall is a key parameter in forest biogeochemical cycle and fire risk ***,considerable uncertainty remains regarding the litterfall variations with forest *** the interannual variation of forest litterfall is crucial for reducing uncertainties in large-scale litterfall *** Based on the available dataset(N=318)with continuous multi-year(≥2 years)measurements of litterfall in Chinese planted and secondary forests,coefficient of variation(CV),variation percent(V_(P)),and the ratio of next-year litterfall to current-year litterfall were used as the indexes to quantify the interannual variability in *** Findings The interannual variations of litterfall showed a declining trend with increasing age from 1 to 90 *** litterfall variations were the largest in 1-10 years(mean CV=23.51%and mean V_(P)=−28.59%to 20.89%),which were mainly from tree growth(mean ratio of next-year to current-year=1.20).In 11-40 years,the interannual variations of litterfall gradually decreased but still varied widely,mean CV was~18%and mean V_(P) ranged from−17.69%to 21.19%.In 41-90 years,the interannual variations minimized to 8.98%in mean CV and~8%in mean V_(P).As a result,forest litterfall remained relatively low and constant when stand age was larger than 40 *** result was different from the previous assumptions that forest litterfall reached relatively stable when stand age was larger than 30,20 or even 15 *** findings can improve the knowledge about forest litter ecology and provide the groundwork for carbon budget and biogeochemical cycle models at a large scale.

关键词： annual litterfall production China forest interannual variation coefficient of variation stand age

FaSnRK1a mediates salicylic acid pathways to enhance strawberry resistance to Botrytis cinerea

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Horticultural Plant Journal 2024年第1期10卷 131-144页

作者： Jingjing Luo wenying yu yuansong Xiao Yafei Zhang Futian Peng State Key Laboratory of Crop Biology College of Horticulture Science and EngineeringShandong Agricultural UniversityTaianShandong 271018China

Strawberry is a major fruit crop worldwide because its nutritional and health benefits to human health,but its productivity is limited by Botrytis *** nonfermentation 1-related protein kinase 1(SnRK1)has a defense function against pathogens,but the function of SnRK1 in the defense response to *** in plants is still *** this study,FaSnRK1a-OE and RNAi fruits were constructed and then inoculated with *** result reveals a positive role of Fa SnRK1a in the regulation of resistance to gray ***1a affects SA content by regulating FaPAL1 and FaPAL2 *** genes related to the SA signaling pathway(FaTGA1 and FaTGA2.1)were significantly increased/decreased in FaSnRK1a-OE or FaSnRK1a-RNAi fruit,***1a interacted with the FaWRKY33.2 protein and negatively regulated FaWRKY33.2 expression,and FaWRKY33.2 acts as a repressor of disease resistance to ***,FaSnRK1a regulates the expression of six PR genes and the activities of antioxidant enzymes to boost defense response after *** *** findings showed that FaSnRK1a increases the resistance of strawberry fruit to *** via SA signaling pathway and interaction with the FaWRKY33.2 transcription factor.

关键词： Strawberry B.cinerea SnRK1 Salicylic acid WRKY transcription factor

Mechanical properties of foamed polyurethane solidified ballasted track

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High-Speed Railway 2023年第2期1卷 120-129页

作者： Yang Xu Luchao Qie Hong Wang wenying yu Railway Engineering Research Institute China Academy of Railway Sciences Corporation LimitedBeijing 100081China

Foamed Polyurethane Solidified Ballasted Track(FPSBT),an innovative railway track,is formed by solidifying ballast bed with foamed *** with the traditional Discrete Ballasted Track(DBT),FPSBT does not require regular maintenance such as tamping and ***,limited studies exist on the mechanical properties of *** this study,Laboratory experiments are conducted on polyurethane samples to investigate the effects of polyurethane density on the mechanical properties of ***,the performance of DBT and FPSBT with different polyurethane densities are compared,and the recommended polyurethane density is *** exhibited negligible accumulation of deformation under cyclic loads,indicating excellent performance of FPSBT owing to the anti-deformation properties of ***,a track load vehicle test is *** exhibited better load-transmitting ability than ***,the construction and application of FPSBT in China are *** study is expected to contribute to realizing a more extensive application of FPSBT.

关键词： Ballasted track Foamed polyurethane Solidified track Track load vehicle

Dynamic Response of Phragmites australis and Suaeda salsa to Climate Change in the Liaohe Delta Wetland

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Journal of Meteorological Research 2021年第1期35卷 157-171页

作者： yushu ZHANG wenying yu Ruipeng JI Yijun ZHAO Rui FENG Qingyu JIA Jinwen WU Institute of Atmospheric Environment China Meteorological AdministrationShenyang 110166 Key Laboratory of Agrometeorological Disasters of Liaoning Province Shenyang 110166 Panjin Meteorological Service Center Liaoning Meteorological BureauPanjin 124010

Because of its unique geographical location and ecological function, the Liaohe Delta Wetland is important in maintaining regional ecological balance and security. Monitoring and evaluating changes in the wetland are therefore of great importance. We used medium-and high-resolution satellite data, meteorological station data, and site measurement data to analyze changes in the area and spatial distribution of Phragmites australis and Suaeda salsa in the Liaohe Delta Wetland from 1998 to 2017, as well as their growth response to the climate change. The results showed that during 1998–2017, the areas of both P. australis and S. salsa wetlands alternated through periods of decreasing,increasing, and then decreasing trends. The annual change in the area and spatial distribution range of S. salsa fluctuated more than that of P. australis. The annual variation of normalized difference vegetation index(NDVI) in P. australis wetland showed an upward trend from 1998 to 2017. The area of P. australis cover that was improved, unchanged, and decreased accounted for 81.8%, 12.3%, and 5.9%, respectively, of the total area;evaporation and wind speed were the main meteorological factors affecting the NDVI;and contribution rates of the climate change and human activities to the NDVI were 73.2% and 26.8%, respectively. The area with vegetation cover being mainly *** that was improved, unchanged, and decreased accounted for 63.3%, 18.3%, and 18.4%, respectively, of the total area;and no meteorological factors significantly affected the NDVI of S. salsa in the region. The interaction between vegetation growth and meteorological factors may help to explain the increasing trend in vegetation *** improvement in wetland vegetation also led to carbon sequestration and an increase in sequestration capacity.

关键词： Liaohe Delta wetland Phragmites australis Suaeda salsa climate change

Evaluation of the Biodiversity Conservation Function in Liaohe Delta Wetland,Northeastern China

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Journal of Meteorological Research 2020年第4期34卷 798-805页

作者： wenying yu Ruipeng JI Xiuzhen HAN Long CHEN Rui FENG Jinwen WU yushu ZHANG Institute of Atmospheric Environment China Meteorological AdministrationShenyang 110166 Key Laboratory of Agrometeorological Disasters of Liaoning Province Shenyang 110166 National Satellite Meteorological Center Beijing 100081 Panjin Meteorological Bureau Panjin 124010

The scientific evaluation of the wetland biodiversity conservation function is the basis of balanced wetland protection and development. Our research sought to provide references for the protection of wetland ecological environments as well as the related planning and management policies. The study established a fitting model for evaluating the biodiversity conservation function in the Liaohe Delta, northeastern China. The new model, the Wetland Biodiversity Conservation Indicator(WBCI), was with four input factors, including the vegetation coverage(VC), habitat suitability index(HI), land use and land cover(LULC) index(LI), and threat factor index(TI) of the LULC type. The values assigned to HI and TI were based on Integrated Valuation of Ecosystem Services and Tradeoffs(In VEST)habitat quality models. The weights of all the factors in WBCI were valued with the Principal Component Analysis(PCA). We evaluated the wetland biodiversity conservation function of Panjin, Liaohe Delta, China, by using the WBCI model based on Gaofen-1(GF-1) satellite data in 2018, and the result was verified with In VEST and other models. It showed that the output map was similar to that of In VEST, with the higher-quality habitat including the wetland, tidal flat, water body, and forest, as well as the lower-quality land use types including the paddy field, crop field, construction land, and land used by traffic. The wetland biodiversity conservation function was better in areas less affected by human disturbance, with very abundant species and good-quality habitat. It was poor in areas impacted by more frequent human activities such as the land cultivation, housing, and traffic, which led to the landscape fragmentation. The WBCI model provided a more accurate reflection of the bird distribution than the In VEST model. The WBCI model was able to reflect the difference in quality of each habitat grade, in contrast to the net primary productivity(NPP) method and species distribution models(

关键词： wetland biodiversity conservation function habitat quality evaluation

Human atlastin GTPases mediate differentiated fusion of endoplasmic reticulum membranes

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Protein & Cell 2015年第4期6卷 307-311页

作者： Xiaoyu Hu (1) Fuyun Wu (1) Sha Sun (1) wenying yu (1) Junjie Hu (1) (2) 1.Tianjin Key Laboratory of Protein Sciences Department of Genetics and Cell Biology College of Life Sciences Nankai University Tianjin 300071 China 2.National Laboratory of Biomacromolecules Institute of Biophysics Chinese Academy of Sciences Beijing 100101 China

Dear Editor,In eukaryotic cells, the endoplasmic reticulum （ER） is a continuous membrane system with interconnected tubules and sheets. The formation of a typical network requires constant fusion between ER membranes.

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Defects in photoreduction reactions:Fundamentals,classification,and catalytic energy conversion

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eScience 2024年第3期4卷 44-64页

作者： Yinghui Wang wenying yu Chunyang Wang Fang Chen Tianyi Ma Hongwei Huang Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastesNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China School of Science RMIT UniversityMelbourneVIC 3000Australia

Powered by optical energy,photocatalytic reduction for fuel production promises to be an ideal long-term solution to a number of key energy *** with enhanced light absorption,fast electron/hole separation rates,and exposed activity sites are essential to improve photocatalytic *** are constrained by their own intrinsic properties and have limited performance in photocatalysis,but defect engineering provides an opportunity to modulate the physical and chemical properties of *** engineering has been shown to be effective in regulating electron distribution and accelerating photocatalytic kinetics during *** review introduces the definition and categorization of defects,then explains the main effects of defect engineering on photoabsorption,carrier separation/migration,and surface reduction *** then review the milestones in the design of defect-engineered photocatalysts for key chemical reactions,including hydrogen evolution,CO_(2)reduction,and N_(2)reduction,and tabulate their respective effects on catalytic ***,we provide insights and perspectives on the challenges and potential of defect engineering for photoreduction reactions.

关键词： Defect engineering Charge separation Hydrogen evolution CO_(2) reduction N_(2) reduction

Fundus artery occlusion caused by cosmetic facial injections

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Chinese Medical Journal 2014年第8期127卷 1434-1437页

作者： Chen Yanyun Wang wenying Li Jipeng yu Yajie Li Lin Lu Ning Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing Ophthalmology & Visual Science Key Laboratory Beijing 100730 China

Background With the increasing popularity of cosmetic facial filler injections in recent years, more and more associated complications have been reported. However, the causative surgical procedures and preventative measures have not been studied well up to now. The aim of this stady was to investigate the clinical characteristics and visual prognosis of fundus artery occlusion resulting from cosmetic facial filler injections. Methods Thirteen consecutive patients with fundus artery occlusion caused by facial filler injections were included. Main outcome measures were filler materials, injection sites, best-corrected visual acuity （BCVA）, fundus fluorescein angiography, and associated ocular and systemic manifestations. Results Eleven patients had ophthalmic artery occlusion （OAO） and one patient each had central retinal artery occlusion （CRAO） and anterior ischemic optic neuropathy （AION）. Injected materials included autologous fat （seven cases）, hyaluronic acid （five cases）, and bone collagen （one case）. Injection sites were the frontal area （five cases）, periocular area （two cases）, temple area （two cases）, and nose area and nasal area （4 cases）. Injected autologous fat was associated with worse final BCVA than hyaluronic acid. The BCVA of seven patients with autologous fat injection in frontal area and temple area was no light perception. Most of the patients with OAO had ocular pain, headache, ptosis, ophthalmoplegia, and no improvement in final BCVA. Conclusions Cosmetic facial injections can cause fundus artery occlusion. Autologous fat injection tends to be associated with painful blindness, ptosis, ophthalmoplegia, and poor visual outcomes. The prognosis is much worse with autologous fat injection than hyaluronic acid iniection.

关键词： autologous fat hyaluronic acid ophthalmic artery retinal artery occlusion blindness

Analysis of a Rare Heavy Rain Weather Process in Autumn in Ulanqab City

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Meteorological and Environmental Research 2024年第2期15卷 1-3,9页

作者： Xinyu CHEN Nan ZHAO wenying yu Chao FAN Ulanqab Meteorological Bureau Ulanqab 012000China Huade Meteorological Bureau Huade 013350China

Based on the conventional observation data and NCEP/NCAR reanalysis data,the circulation situation,influencing systems and causes of the heavy rain during September 20-21,2010 in Ulanqab City were analyzed from the evolution process of weather circulation situation and the changes of various physical quantity *** results show that there was an obvious frontal zone between 45-52°N,which brought strong cold *** transport of warm and humid air outside the subtropical high and typhoon was the main water vapor source of the strong precipitation,and the southwest jet at 700 hPa transported abundant water *** was a broad inverted trough to the south of 45°N,with a central value of 1000.0 *** City was on the top of the inverted trough,stable and less moved,which was conducive to the occurrence of systematic heavy *** rainstorm was a strong precipitation process caused by the intersection of cold air brought by the southward movement of the upper frontal zone and warm and humid air outside the subtropical *** the precipitation,the invasion of strong cold air brought frost and cold wave weather to Ulanqab City.

关键词： Frontal zone Subtropical high Inverted trough Frost Ulanqab City