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Patterns and drivers of plant sexual systems in the dry-hot valley region of southwestern China

Plant Diversity 2024年第2期46卷 158-168页

作者： Rong Ma Qi Xu Yongqian Gao deli Peng Hang Sun Bo song State Key Laboratory of Plant Diversity and Specialty Crops/Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Populations Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China College of Life Sciences Shaanxi Normal UniversityXi'an 710119China Yunnan Forestry Technological College Kunming 650224China School of Life Science/Key Laboratory of Yunnan for Biomass Energy and Biotechnology of Environment Yunnan Normal UniversityKunming 650500YunnanChina

Sexual systems play important roles in angiosperm evolution and exhibit substantial variations among different floras. Thus, studying their evolution in a whole flora is crucial for understanding the formation and maintenance of plant biodiversity and predicting its responses to environmental change. In this study, we determined the patterns of plant sexual systems and their associations with geographic elements and various life-history traits in dry-hot valley region of southwestern China, an extremely vulnerable ecosystem. Of the 3166 angiosperm species recorded in this area, 74.5% were hermaphroditic,13.5% were monoecious and 12% were dioecious, showing a high incidence of diclinous species. Diclinous species were strongly associated with tropical elements, whereas hermaphroditic species were strongly associated with temperate and cosmopolitan elements. We also found that hermaphroditism was strongly associated with showy floral displays, specialist entomophily, dry fruits and herbaceous *** was strongly associated with inconspicuous, pale-colored flowers, generalist entomophily, fleshy fruits, and woody plants, whereas monoecy was strongly associated with inconspicuous, pale-colored flowers, anemophily, dry fruits, and herbaceous plants. In addition, hermaphroditic species with generalist entomophily tended to flower in the dry season, whereas diclinous species with specialist entomophily tended to flower in the rainy season. However, independent of sexual systems, plants that produce dry fruits tended to flower in the rainy season and set fruits in the dry season, but the opposite pattern was found for fleshy fruit-producing plants. Our results suggest that in the dry-hot valleys, plant sexual systems are associated with geographic elements as well as various life-history traits that are sensitive to environmental change.

关键词： Floral traits Fruit type Growth form Pollination system Reproductive phenology

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Surface reconstruction enabled o-PdTe@Pd core-shell electrocatalyst for efficient oxygen reduction reaction

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Chinese Chemical Letters 2024年第8期35卷 314-318页

作者： Min song Qian Zhang Tao Shen Guanyu Luo deli Wang Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074China

Palladium-based alloy catalysts have been employed as one of the potential candidates for oxygen reduc-tion reaction(ORR),but the dissolution of transition metal hinders their ***,structure or-dered PdTe intermetallic with Pd shell(o-PdTe@Pd)are synthesized via an electrochemical etching driven surface reconstruction *** surface reconstruction could tune the electronic structure,weaken the adsorption energy of reaction intermediates on o-PdTe@Pd,resulting in enhanced electrocatalytic ac-tivity for *** mass activity of o-PdTe@Pd is about 3.3 and 2.7 times higher than that of Pd/C in acid and alkaline,***,the half-potentials for ORR decay only about 44 mV and 12 mV after 30 k cycles accelerated durability test in acid and alkaline media,*** enhanced dura-bility originates from the resistance of Te atoms dissolve in the ordered PdTe intermetallic core and the core-shell *** assembled in a Zn-air battery,o-PdTe@Pd electrode delivers a higher specific capacity(794 mAh/g)and better cycling stability than Pt/C.

关键词： Surface reconstruction Core-shell structure Intermetallic Oxygen reduction reaction Tellurium

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Advances of Synergistic Electrocatalysis Between Single Atoms and Nanoparticles/Clusters

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Nano-Micro Letters 2024年第11期16卷 377-412页

作者： Guanyu Luo Min song Qian Zhang Lulu An Tao Shen Shuang Wang Hanyu Hu Xiao Huang deli Wang Key Laboratory of Material Chemistry for Energy Conversion and Storage(Huazhong University of Science and Technology)Ministry of Education School of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China

Combining single atoms with clusters or nanoparticles is an emerging tactic to design efficient *** synergy effect and high atomic utilization of active sites in the composite catalysts result in enhanced electrocatalytic performance,simultaneously provide a radical analysis of the interrelationship between structure and *** this review,the recent advances of single-atomic site catalysts coupled with clusters or nanoparticles are ***,the synthetic strategies,characterization,dynamics and types of single atoms coupled with clusters/nanoparticles are introduced,and then the key factors controlling the structure of the composite catalysts are ***,several clean energy catalytic reactions performed over the synergistic composite catalysts are ***,the encountering challenges and recommendations for the future advancement of synergistic structure in energy-transformation electrocatalysis are outlined.

关键词： Single atoms Nanoparticles Clusters Synergistic composite catalysts Synergistic effect

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旅游高职教育发展的问题与对策

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旅游科学 2012年第2期26卷 85-94页

作者：宋德利山东旅游职业学院山东济南250200

随着中国旅游业的迅猛发展,旅游业人力资源出现了严重短缺局面,与此同时,旅游高等职业教育发展却受到政策、生源、行业和自身发展水平等制约,步履维艰。为适应旅游业大发展,必须调整职业教育结构,理顺高等职业教育支持政策,提升旅游业... 详细信息

随着中国旅游业的迅猛发展,旅游业人力资源出现了严重短缺局面,与此同时,旅游高等职业教育发展却受到政策、生源、行业和自身发展水平等制约,步履维艰。为适应旅游业大发展,必须调整职业教育结构,理顺高等职业教育支持政策,提升旅游业就业吸引力,提高旅游高职院校的办学水平。

关键词：旅游高职教育问题对策

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The Persistence and Zonal Scale of Atmospheric Dipolar Modes

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Advances in Atmospheric Sciences 2024年第3期41卷 478-492页

作者： Jie song State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric Physics(IAP)Chinese Academy of SciencesBeijing 100029China

This study investigates the relationship between the persistence and the zonal scale of atmospheric dipolar modes(DMs). Results from the daily data of ERA5 and the long-term output of an idealized atmospheric model show that the atmospheric DMs with a broader(narrower) zonal scale dipolar structure possess a longer(shorter) persistence. A detailed vorticity budget analysis indicates that the persistence of a hemispheric-scale DM(1/1 DM) and a regional or sectoral DM(1/8 DM) in the model both largely rely on the persistence of the nonlinear eddy forcing. Linear terms can indirectly reduce the persistence of the anomalous nonlinear eddy forcing in a 1/8 DM by modifying the baroclinicity via the arousal of anomalous vertical motions. Therefore, the atmospheric DMs with a broader(narrower) zonal scale possess a longer(shorter) persistence because the effects of the linear terms are less(more) pronounced when the atmospheric DMs have better(worse) zonal symmetry. Further analyses show that the positive eddy feedback effect is weak or even absent in a 1/8DM and the high-frequency eddy forcing acts more like a concomitant phenomenon rather than a leading driving factor for a 1/8 DM. Thus, the hemispheric-scale DM and the regional or sectoral DMs are different, not only in their persistence but also in their dynamics.

关键词： NAM NAO eddy feedback persistence linear term

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落叶松—红松复层林培育技术及效益分析

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防护林科技 2016年第5期29卷 29-31页

作者：宋德利辽宁省森林经营研究所辽宁丹东118003

根据多年在落叶松人工林培育方面的试验研究成果,系统地提出了落叶松-红松复层林培育技术,主要包括上层林木抚育、冠下栽植以及调控技术。上层保留林木的郁闭度应控制在0.5~0.6,冠下栽植红松后12年内适时伐除上层落叶松,为冠下幼树的生... 详细信息

根据多年在落叶松人工林培育方面的试验研究成果,系统地提出了落叶松-红松复层林培育技术,主要包括上层林木抚育、冠下栽植以及调控技术。上层保留林木的郁闭度应控制在0.5~0.6,冠下栽植红松后12年内适时伐除上层落叶松,为冠下幼树的生长创造条件。

关键词：落叶松-红松复层林郁闭度上层林木保留密度更新密度

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辽宁东部山区柞树林成熟龄的初步研究

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防护林科技 2014年第3期27卷 22-23页

作者：宋德利辽宁省森林经营研究所辽宁丹东118002

柞树是辽东山区的主要阔叶用材树种,在天然次生林的分布中,柞树占据的面积较大,并以蒙古栎和辽东栎为多。为了充分利用该树种的经济价值,对其成熟龄进行初步研究。结果表明:柞树的数量成熟和经济成熟期,均在50年左右;工艺成熟,小径原木... 详细信息

柞树是辽东山区的主要阔叶用材树种,在天然次生林的分布中,柞树占据的面积较大,并以蒙古栎和辽东栎为多。为了充分利用该树种的经济价值,对其成熟龄进行初步研究。结果表明:柞树的数量成熟和经济成熟期,均在50年左右;工艺成熟,小径原木和车辕材55年时进入工艺成熟期,一般原木80年后才到来;柞树55年时开始心腐,随年龄增长会逐渐加重.初步认为萌生柞树的主伐龄为50年。

关键词：辽宁东部山区柞树成熟龄

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