Gaoligong Mountain(hereafter,GLGM)is located at the intersection of Myanmar and China’s Yunnan Province and Xizang Zizhiqu,and spans three globally significant biodiversity hotspots:the Himalayas,Indo-Burma,and the M...Gaoligong Mountain(hereafter,GLGM)is located at the intersection of Myanmar and China’s Yunnan Province and Xizang Zizhiqu,and spans three globally significant biodiversity hotspots:the Himalayas,Indo-Burma,and the Mountains of Southwest China.Although surveys of mammals in this ecologically important region have a long history,there is no comprehensive systematic checklist and distribution account of the mammals of GLGM.Here,we compiled a mammal species checklist of GLGM based on thorough field investigations and literature reviews.We also examined specimen collections and applied camera trapping surveys to explore the region’s mammal diversity and distribution patterns.We recorded 212 mammal species in nine orders,33 families,and 119 genera,which accounts for 30.5%of China’s mammal species,and a high proportion of nationally protected(50)and globally threatened(29)species.Mammal species richness showed a symmetrical unimodal curve along the elevation gradient,peaking at intermediate elevations(2000 to 2500 m above sea level(asl)),and increasing generally from south to north,slightly higher in the east slope than in the west.Cluster analysis and non-metric multidimensional scaling revealed three distinct elevational assemblages(<900 m asl.,900-3500 m asl.,and>3500 m asl)and significant south-to-north variation,but no substantial differences between the east and west slopes.The GLGM present a unique conservation value due to the high proportions of rare and endangered mammal species,complex faunal composition,high endemism,and being the distribution boundary for many species.This study is an important phased account of mammal diversity in GLGM and makes a prospect for future research.展开更多
In recent years,ionic modulation,particularly hydrogen intercalation,has gained attention as a powerful method for tuning the properties of materials.Although the SrFeO_(x)system is similar to SrCoO_(x),which can be p...In recent years,ionic modulation,particularly hydrogen intercalation,has gained attention as a powerful method for tuning the properties of materials.Although the SrFeO_(x)system is similar to SrCoO_(x),which can be protonated to the HSrCoO_(2.5)phase,it remains a challenge for the hydrogenation of SrFeO_(2.5).In this study,starting from the perovskite SrFeO_(3−δ),we achieved hydrogen intercalation and obtained stable hydrogenated brownmillerite-phase HSrFeO_(2.5)via Pt-catalyzed H-spillover at room temperature.The results indicate that the hydrogenation process is accompanied by the simultaneous oxygen ionic release,that is,perovskite SrFeO_(3−δ)is the prerequisite for the hydrogen-induced phase transition.Subsequently,upon hydrogenation,the entire phase transition cycle among the perovskite SrFeO_(3−δ),brownmillerite SrFeO_(2.5),and the hydrogenated HSrFeO_(2.5)phase,is completed.Furthermore,SrFeO_(3−δ)exhibits a remarkable 9.4%lattice expansion,and its electronic state undergoes a multi-step evolution,transforming from a pristine helical antiferromagnetic insulator to a bad metal,eventually returning to an antiferromagnetic insulator.Based on the obtained results,we fabricated microscale patterns with varied surface morphologies and electrical conductivities that can be used in fabricating electronic devices.This study presents a novel approach for modulating the properties of correlated and functional materials.展开更多
基金supported by the National Key Research and Development Program of China(2022YFC2602500,2022YFC2601200)Major Science and Technique Programs in Yunnan Province(202102AA310055)+6 种基金Science and Technology Basic Resources Investigation Program of China(2021FY100200)Project for Talent and Platform of Science and Technology in Yunnan Province Science and Technology Department(202205AM070007)National Natural Science Foundation of China(32000304)Yunnan Fundamental Research Projects(202101AT070294)Chinese Academy of Sciences“Light of West China”Program and Yunnan Revitalization Talent Support Program Young Talent Project(XDYC-QNRC-2022-0379 to Q.L.)Chinese Academy of Sciences“Light of West China”Program(292021000004 to X.Y.L.)Yunnan Provincial Youth Talent Support Program(YNWR-QNBJ-2020-127 to X.Y.L.)。
文摘Gaoligong Mountain(hereafter,GLGM)is located at the intersection of Myanmar and China’s Yunnan Province and Xizang Zizhiqu,and spans three globally significant biodiversity hotspots:the Himalayas,Indo-Burma,and the Mountains of Southwest China.Although surveys of mammals in this ecologically important region have a long history,there is no comprehensive systematic checklist and distribution account of the mammals of GLGM.Here,we compiled a mammal species checklist of GLGM based on thorough field investigations and literature reviews.We also examined specimen collections and applied camera trapping surveys to explore the region’s mammal diversity and distribution patterns.We recorded 212 mammal species in nine orders,33 families,and 119 genera,which accounts for 30.5%of China’s mammal species,and a high proportion of nationally protected(50)and globally threatened(29)species.Mammal species richness showed a symmetrical unimodal curve along the elevation gradient,peaking at intermediate elevations(2000 to 2500 m above sea level(asl)),and increasing generally from south to north,slightly higher in the east slope than in the west.Cluster analysis and non-metric multidimensional scaling revealed three distinct elevational assemblages(<900 m asl.,900-3500 m asl.,and>3500 m asl)and significant south-to-north variation,but no substantial differences between the east and west slopes.The GLGM present a unique conservation value due to the high proportions of rare and endangered mammal species,complex faunal composition,high endemism,and being the distribution boundary for many species.This study is an important phased account of mammal diversity in GLGM and makes a prospect for future research.
基金supported by the National Key R&D Program of China(Grant Nos.2022YFA1403000 and 2024YFA1408302)the CAS Project for Young Scientists in Basic Research(Grant No.YSBR-047)the Strategic Priority Research Program of the Chinese Academy of Sciences of China(Grant No.XDB33000000)。
文摘In recent years,ionic modulation,particularly hydrogen intercalation,has gained attention as a powerful method for tuning the properties of materials.Although the SrFeO_(x)system is similar to SrCoO_(x),which can be protonated to the HSrCoO_(2.5)phase,it remains a challenge for the hydrogenation of SrFeO_(2.5).In this study,starting from the perovskite SrFeO_(3−δ),we achieved hydrogen intercalation and obtained stable hydrogenated brownmillerite-phase HSrFeO_(2.5)via Pt-catalyzed H-spillover at room temperature.The results indicate that the hydrogenation process is accompanied by the simultaneous oxygen ionic release,that is,perovskite SrFeO_(3−δ)is the prerequisite for the hydrogen-induced phase transition.Subsequently,upon hydrogenation,the entire phase transition cycle among the perovskite SrFeO_(3−δ),brownmillerite SrFeO_(2.5),and the hydrogenated HSrFeO_(2.5)phase,is completed.Furthermore,SrFeO_(3−δ)exhibits a remarkable 9.4%lattice expansion,and its electronic state undergoes a multi-step evolution,transforming from a pristine helical antiferromagnetic insulator to a bad metal,eventually returning to an antiferromagnetic insulator.Based on the obtained results,we fabricated microscale patterns with varied surface morphologies and electrical conductivities that can be used in fabricating electronic devices.This study presents a novel approach for modulating the properties of correlated and functional materials.
