Multi-year SST and NCEP/NCAR reanalyzed wind data were employed to study the impacts of El Nio on the Southeast Asian summer monsoon (SEASM). It was found that the impacts of El Nio on the SEASM differed distinctly fr...Multi-year SST and NCEP/NCAR reanalyzed wind data were employed to study the impacts of El Nio on the Southeast Asian summer monsoon (SEASM). It was found that the impacts of El Nio on the SEASM differed distinctly from those on the East Asian summer monsoon (EASM) and the Indian summer monsoon (ISM). Composite analysis indicated that the "gear point" of coupling between the Indo-monsoon circulation and the Pacific-Walker circulation was located in the western margins of Southeast Asia when the developing stage of El Nio events covered the boreal summer. The anomalous circulations in the lower and upper troposphere and divergent circulation are all favorable for the strengthening of the SEASM during this period. Following the evolution of El Nio, the "gear point" of the two cells shifted eastward to the central Pacific when the mature or decaying period of El Nio events covered the boreal summer. The anomalous circulations are favorable for the weakening of the SEASM. The anomalous indexes of intensity of SEASM accord well with the above results. Additionally, the difference of SSTA patterns in the tropical Indo-Pacific Ocean between the two stages of the El Nio may play an important role.展开更多
Tropical mountainous areas not only provide substantial carbon storage and play an important role in global biological diversity, but also provide basic livelihood for a large number of poor ethnic minorities. However...Tropical mountainous areas not only provide substantial carbon storage and play an important role in global biological diversity, but also provide basic livelihood for a large number of poor ethnic minorities. However, there is no unified and explicit definition for mountainous areas. The local elevation range(LER) is a crucial structural parameter for delineating mountainous areas. However, current LER products are limited by the subjective selection of an optimum statistical window or coarser spatial resolution of topographical data. In this study, we presented an approach using thresholds for three topographic parameters, elevation, slope, and LER, derived from the Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model(ASTER GDEM) to redelineate the vast mountainous areas of mainland Southeast Asia(MSEA). The mean change-point analysis method was applied to determine the optimum statistical window of the 1 arc second(approximately 30 m)-resolution GDEM LER. The results showed that: First, the optimum statistical window is 38 × 38 cell units(width × height) in a rectangular neighborhood, or an area of about 1.30 km^2 for calculating GDEM LER in MSEA. Second, the LER of more than 80% of the area ranges from 30 m to 499 m in MSEA. The LERs in the northern and northwestern MSEA are greater than their counterparts in the south and east. Third, the area of the re-delineated mountainous areas was 83.52 × 10~4 km^2, about 38.71% of the total area. Spatially, the mountainous areas are mainly distributed in the north and northeast of MSEA. The re-delineated 30-m resolution map of the mountainous areas will serve as a topographical dataset for monitoring mountainrelated land surface changes in MSEA. The parameter-modified mountain extraction procedure can be expanded to delineate global mountainous areas.展开更多
The Southeast Asia Biodiversity Research Institute(SEABRI)is an international scientific research and education organization affiliated directly to the Chinese Academy of Sciences(CAS)and managed by the Xishuangbanna ...The Southeast Asia Biodiversity Research Institute(SEABRI)is an international scientific research and education organization affiliated directly to the Chinese Academy of Sciences(CAS)and managed by the Xishuangbanna Tropical Botanical展开更多
The giant potash deposit on the Khorat Plateau is one of the most promising targets for exploitation of potassium salts.So far,many researches and geologic survey have been conducted on the giant potash deposits.Hence...The giant potash deposit on the Khorat Plateau is one of the most promising targets for exploitation of potassium salts.So far,many researches and geologic survey have been conducted on the giant potash deposits.Hence,it is necessary to make an overall review on the potash deposits.The potash deposit on the Khorat Plateau was formed during the Middle to Late Cretaceous,during which seawater was enriched in Ca2+and depleted in SO42-compared with those of modern seawater.In addition to seawater,continental water and hydrothermal fluids could have affected the evaporite basins.The seawater was probably derived from Tethys ocean,and the brine should have evaporated to some extent before entering into the basin systems based on the evidence of absence of carbonates and unproportionate sulphate compared with chloride salts.The paleo-climate during Middle to Late Cretaceous was characterized as high temperature and extremely arid environment,which is favourable for deposition of potassium-magnesium saline minerals.The major saline minerals are of anhydrite,halite,carnallite,sylvite and,tachyhydrite,with trace amounts of borates.The resources of the potash deposit on the Khorat Plateau could be approximately as much as 400×109 t of carnallite and 7×109 t of sylvite.The evaporite sequences have been deformed and altered by postdepositinal processes,including tectonic movements and chemical alteration.Salt domes were formed in the postdepositional processes.Based on the analyses of geophysical surveys and drilling projects,high-quality sylvinite ores are commonly found at the flanks of those salt domes due to incongruent dissolution of carnallite.The furure potential prospecting areas for the highquality sylvinite ores would be on the edges of the Khorat Plateau.展开更多
Based on the mapping program of the map series of karst geology in China and Southeast Asia, the paper summarizes the application of remote sensing technique and the process of acquiring information from remote sensin...Based on the mapping program of the map series of karst geology in China and Southeast Asia, the paper summarizes the application of remote sensing technique and the process of acquiring information from remote sensing images. Generally, remote sensing technique serves as an effective method to recognize information about karst topography, rocky desertification and karst collapse. Interpretation of remote sensing images, in combination with field verification and cartographic generalization, provides basic data for updating the program database and compiling synthetic maps. In interpreting remote sensing images, automatic extraction can make it more efficient and visual interpretation can improve its accuracy.展开更多
Seizures due to neurocysticercosis(NCC) is a neglected human-to-human transmitted disorder and an emerging problem worldwide.A substantial portion of recent onset seizures is known to be attributed to NCC in Taenia so...Seizures due to neurocysticercosis(NCC) is a neglected human-to-human transmitted disorder and an emerging problem worldwide.A substantial portion of recent onset seizures is known to be attributed to NCC in Taenia solium(T.solium) endemic areas where populations which neither raise pigs nor eat pig meat are also at risk.High prevalence of NCC causing epilepsy has been reported in the underdeveloped areas of Southeast Asia(SEA) however,only fragmentary information on its incidence is available in countries like Malaysia.In Malaysia T.solium infection was previously thought to be infrequent due to Muslim population majority and the religious prohibition of consuming pork,but it is not totally absent There is an evident lack of knowledge and awareness of the actual burden,routes of transmission,and the impact of NCC in this region.The problem is assumed to be more prevalent particularly in cities because of the frequent inflow of possibly T.solium infected individuals or carriers among those who migrate from neighboring endemic countries to Malaysia.The issue of imported cases that are likely to be emerging in Malaysia is highlighted here.An accurate quantification of regional burdens of epilepsy due to NCC in Malaysia is warranted considering the disease emergence in its neighboring countries.It is suggested that the importance of NCC be recognized through quantification of its burden,and also to collect epidemiological data for its subsequent elimination in line of World Health Organization's mission for control of cysticercosis as a neglected tropical disease.In this review the need as well as a strategy for neurc-care center screening of epilepsy cases,and various issues with possible explanations are discussed.It is also proposed that NCC be declared as a reportable disease which is one of the eradicable public health problems in SEA.展开更多
Objective:To understand the cause for the differences between potentially mild Southeast Asian and the more pathogenic ZIKV in South America.Methods:A comparative genomic analysis was performed to determine putative c...Objective:To understand the cause for the differences between potentially mild Southeast Asian and the more pathogenic ZIKV in South America.Methods:A comparative genomic analysis was performed to determine putative causations stemming from ZIKV.Results:Phylogcnctic analyses integrating geographical and time factors revealed that Southeast Asian ZIKV might not be the direct source of South American outbreaks as previously speculated.Amino acid residues unique to South American ZIKV isolates at the envelope,pr and NS1 proteins are listed and shown in the structural context.These unique residues on external viral proteins are not found in Southeast Asian ZIKV and could be responsible for the ongoing outbreak either via an intrinsic property of the virus or interactions with human immunity.Only a selected few primer/probe sets currently in clinical use were identified of being capable of detecting ZIKV strains worldwide.The envelope proteins of dengue virus(DENV) and ZIKV also showed a remarkable degree of similarity especially at the surface residues.Conclusions:findings that may help explain the cross-reactivity of DENV antibodies to ZIKV.Thus,major caveats must be exercised in using existing diagnostic tools for ZIKV.展开更多
Glochidion(Phyllanthaceae;leafflower trees)is a genus of trees which is widely reported to be pollinated by leafflower moths(Gracillariidae:Epicephala)in temperate and subtropical Asia,Australia,and the Pacific island...Glochidion(Phyllanthaceae;leafflower trees)is a genus of trees which is widely reported to be pollinated by leafflower moths(Gracillariidae:Epicephala)in temperate and subtropical Asia,Australia,and the Pacific islands.However,the pollination ecology of Glochidion is not well described from tropical Asia,the region where it is most species-rich at both local(<9 spp.)and regional(~200 spp.)scales.Here we report investigations of pollination biology and species-specificity of five Glochidion species in tropical Southeast Asia(Cambodia).Through nocturnal observations and fruit dissections,we find that at least three and likely five Glochidion species in Cambodia are pollinated by seed-parasitic leafflower moths.We find no evidence that any of these leafflower moths are non-mutualistic parasites,despite known examples of such parasites of this mutualism elsewhere in Asia.While the presence of a single larva in a fruit results in only a fraction of seeds being consumed,the presence of more than one larva per fruit-a frequent occurrence in some species—can result in almost all seeds within the fruit being infested.Multilocus phylogenetic analysis indicates that there are five different minimally monophyletic leafflower moth clades,each of which pollinates a unique Glochidion host species.Our results indicate that in its center of diversity in tropical Asia this system is an obligate pollination mutualism as previously described at the global margins of its distribution.These findings provide insights into the processes that generate and maintain biodiversity and maintain mutualism stability in plant-insect interactions in this biodiversity hotspot.展开更多
The compilation of serial maps of karst geology in China and Southeast Asia is a project under the 'One Belt One Road' geological survey plan granted by China Geological Survey. This paper summarized the resea...The compilation of serial maps of karst geology in China and Southeast Asia is a project under the 'One Belt One Road' geological survey plan granted by China Geological Survey. This paper summarized the research trend of geoscientific mapping in China and Southeast Asia and introduced the significance, contents, technical routes, operating methods and progress of the project. Through bilateral and multilateral cooperation, this project builded an international cooperation platform for mapping and completes the preliminary compilation of related karst geological maps in China and Southeast Asia, thus filling up the blank of karst geological maps in this region.展开更多
As China and Southeast Asian countries have accelerated and globalized their economic development, karst environmental problems have become increasingly prominent and studying on and compiling maps of karst geology is...As China and Southeast Asian countries have accelerated and globalized their economic development, karst environmental problems have become increasingly prominent and studying on and compiling maps of karst geology is quite important. Therefore, based on a wide collection of data in Southeast Asian countries, a cooperative map compilation has been carried out internationally. Through comprehensive research and analysis, a unified understanding has been achieved in terms of compiling principles, contents and representing methods, Distribution of Karst in Southern China and Southeast Asia(1/5 000 000) has been compiled, which provides foundations for environmental protection and scientific studies of karst geology.展开更多
1 Introduction The Southeast Asia is endowed with a diversity of mineral resources(Khin Zaw et al.,2014).Tin,copper,nickel,bauxite,chromium and potash resources are widely distributed in the Southeast Asia,show consid...1 Introduction The Southeast Asia is endowed with a diversity of mineral resources(Khin Zaw et al.,2014).Tin,copper,nickel,bauxite,chromium and potash resources are widely distributed in the Southeast Asia,show considerable economic significance,have obvious complementarity to China,and is paid wide attention by Chinese geologists and mining industry in recent years.展开更多
The situation in Southeast Asia in 2017 was generally stable,as relations with China continued to improve,and progress in maritime consultations continued to develop.I.The political situation is stable and generally m...The situation in Southeast Asia in 2017 was generally stable,as relations with China continued to improve,and progress in maritime consultations continued to develop.I.The political situation is stable and generally manageable Stability is manifested in the following aspects.The governments of the Philippines,Myanmar,Vietnam,Laos are seeking stability and good governance.展开更多
In the context of the Belt and Road Initiative,it is of great significance to study the trade ties between China and Southeast Asia with cocoon silk as a link.Trend analysis,trade competitiveness index and trade compl...In the context of the Belt and Road Initiative,it is of great significance to study the trade ties between China and Southeast Asia with cocoon silk as a link.Trend analysis,trade competitiveness index and trade complementarity index were comprehensively used in this paper to study the competitiveness and complementarity of the cocoon silk trade between China and Southeast Asia.The results show that the export trade volume of cocoon silk of China and Southeast Asia is decreasing while fluctuating,but it is difficult for other regions to replace their export trade status in the world market.The development trend of the replacement of the silkworm cocoon trade by the raw silk trade is presented.The cocoon silk trade of China and Southeast Asia is characterized by dislocation competition.China's raw silk export trade is competitive and has become the leader of the raw silk export camp.This paper further analyzes the changes and complementarities of the cocoon silk trade competitiveness between China and Southeast Asia.展开更多
The Belt and Road Initiative is set to launch a new era of trade and partnership between China and ASEAN countries,which will be extended further to Africa and Europe.China has an increasing influence in South and Sou...The Belt and Road Initiative is set to launch a new era of trade and partnership between China and ASEAN countries,which will be extended further to Africa and Europe.China has an increasing influence in South and Southeast Asia with its support for infrastructure construction projects in local areas.CHINA and Pakistan enjoy a strong relationship.展开更多
Based on the phenomenon of personal pronouns with attributives,this paper investigates the development and evolution of grammar in Southeast Asia Huayu.The results showed that the personal pronouns with attributives h...Based on the phenomenon of personal pronouns with attributives,this paper investigates the development and evolution of grammar in Southeast Asia Huayu.The results showed that the personal pronouns with attributives have shown an upward development trend in the centuries-old Huayu,as evidenced by the increasing number and frequency of their use,and the expansion of the range of personal pronouns that can carry attributives as well as the types of attributives.In addition,investigating the use of this linguistic phenomenon in Huayu,Putonghua,and Mandarin in a global perspective,it can be found that the three maintain a greater consistency.展开更多
Global warming and climate change is one of the most extensively researched and discussed topical issues affecting the environment.Although there are enough historical evidence to support the theory that climate chang...Global warming and climate change is one of the most extensively researched and discussed topical issues affecting the environment.Although there are enough historical evidence to support the theory that climate change is a natural phenomenon,many research scientists are widely in agreement that the increase in temperature in the 20 th century is anthropologically related.The associated effects are the variability of rainfall and cyclonic patterns that are being observed globally.In Southeast Asia the link between global warming and the seasonal atmospheric flow during the monsoon seasons shows varying degree of fuzziness.This study investigates the impact of climate change on the seasonality of monsoon Asia and its effect on the variability of monsoon rainfall in Southeast Asia.The comparison of decadal variation of precipitation and temperature anomalies before the 1970 s found general increases which were mostly varying.But beyond the 1970 s,global precipitation anomalous showed increases that almost corresponded with increases in global temperature anomalies for the same period.There are frequent changes and a shift westward of the Indian summer monsoon.Although precipitation is observed to be 70%below normal levels,in some areas the topography affects the intensity of rainfall.These shifting phenomenon of other monsoon season in the region are impacting on the variability of rainfall and the onset of monsoons in Southeast Asia and is predicted to delay for 15 days the onset of the monsoon in the future.The variability of monsoon rainfall in the SEA region is observed to be decadal and the frequency and intensity of intermittent flooding of some areas during the monsoon season have serious consequences on the human,financial,infrastructure and food security of the region.展开更多
A quantitative approach to the national geopolitical influence is helpful to provide a reference for national sustainable development on the international stage, based on describing national diplomatic capacity and ov...A quantitative approach to the national geopolitical influence is helpful to provide a reference for national sustainable development on the international stage, based on describing national diplomatic capacity and overseas influence. Herein, this study proposes a complex geopolitical influence model, considering the affected nations' response. The geopolitical influences of great power in the affected nation are correlated with overall strength, the acceptance degree of the affected nation to the great power and the distance between both sides. Then, the geopolitical influences of China and the US in Southeast Asia countries are empirically analyzed from 2005 to 2015. The geopolitical influence of China in Southeast Asia has been largely growing for the past decades, accompanying with a constant trend of the US' effects. It is believed that China and the US can coexist peacefully in Southeast Asia to promote the regional development, and jointly create an open, inclusive and balanced regional cooperation architecture that benefits all nations in this region and great powers, through mutual political trust and economic beneficial cooperation. This study may contribute to advancing the policy debate and determining the optimal cooperation in pledging commitment to a new and sustainable model of great power relationship among the various regional geopolitical options.展开更多
Since the initial description, the name Musa aurantiaca Baker (1893) has been unclear to most botanists. The aim of this study is to settle its true identity and to update the description. The plant is distributed in ...Since the initial description, the name Musa aurantiaca Baker (1893) has been unclear to most botanists. The aim of this study is to settle its true identity and to update the description. The plant is distributed in the regions of Upper Assam and Arunachal Pradesh, India, Northern Myanmar and Tibet, China where it occurs commonly but it is not mentioned in Chinese literature at all. In this paper, the authors also review the description and the literature history of M. aurantiaca from 1893 to the present. Musa aurantiaca Baker is typified here.展开更多
Although landscape features such as mountains and rivers are recognized often as limiting factors to amphibian dispersal and gene flow, a limited number of studies have investigated such patterns across Southeast Asia...Although landscape features such as mountains and rivers are recognized often as limiting factors to amphibian dispersal and gene flow, a limited number of studies have investigated such patterns across Southeast Asia. A perfect example of this is Thailand, located in one of the world's biodiversity hotspot regions. Thailand represents the corridor between mainland Asia and the Sunda Shelf, a famous and widely recognized biogeographic region, and yet there are few studies on the genetic structure among populations of amphibian species distributed across Thailand. The Southeast Asian tree frog, Chiromantis hansenae has been reported to possess a geographic range that is restricted to Thailand and, presumably, Cambodia. Here, we investigate phylogenetic relationships among C. hansenae populations using partial sequences of the mitochondrial 16 S rRNA gene and nuclear POMC gene. Our results reveal two distinct evolutionary lineages within C. hansenae populations in Thailand. The genetic divergence among populations between these two clades is considerable, and results support inter-population divergence, and high genetic differentiation(pairwise FST = 0.97), between two localities sampled in western Thailand(TK1 and TK2), separated from each other by 40 kilometers only. The results suggest that landscape features across Thailand may have a profound impact on patterns of diversification in the country, underscoring the urgent need for fine-scale investigations of genetic structure of endemic and "widespread" species.展开更多
Since the initial description, the name Musa dasycarpa Kurz (1867) has been unclear to most botanists. It has usually been synonymized with M. velutina H. Wendl. & Drude (1875). However, although the original diag...Since the initial description, the name Musa dasycarpa Kurz (1867) has been unclear to most botanists. It has usually been synonymized with M. velutina H. Wendl. & Drude (1875). However, although the original diagnosis was very short, 'fruits hairy', it is adequate. Thus, according to Vienna Codes, M. dasycarpa Kurz has priority over M. velutina H. Wendl. & Drude. The aim of this study is to settle the true identity and to update the description of M. dasycarpa Kurz. For that purpose the names M. dasycarpa and M. velutina are typified. In addi-tion, critical notes regarding M. assamica Bull. are given; it is neotypified here, and considered as conspecific with M. sanguinea Hook. f.展开更多
基金Project KZCX2-205,G1998040900,Project of Natural Sciences foundation of Shandong Province"A study on the relationship between variability of warm pool and summer rainfall in Shandong"Key project of CAS"Integrated Study on the Activity of the SCS Monsoon and its Effects?"
文摘Multi-year SST and NCEP/NCAR reanalyzed wind data were employed to study the impacts of El Nio on the Southeast Asian summer monsoon (SEASM). It was found that the impacts of El Nio on the SEASM differed distinctly from those on the East Asian summer monsoon (EASM) and the Indian summer monsoon (ISM). Composite analysis indicated that the "gear point" of coupling between the Indo-monsoon circulation and the Pacific-Walker circulation was located in the western margins of Southeast Asia when the developing stage of El Nio events covered the boreal summer. The anomalous circulations in the lower and upper troposphere and divergent circulation are all favorable for the strengthening of the SEASM during this period. Following the evolution of El Nio, the "gear point" of the two cells shifted eastward to the central Pacific when the mature or decaying period of El Nio events covered the boreal summer. The anomalous circulations are favorable for the weakening of the SEASM. The anomalous indexes of intensity of SEASM accord well with the above results. Additionally, the difference of SSTA patterns in the tropical Indo-Pacific Ocean between the two stages of the El Nio may play an important role.
基金supported by the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDA20010203)
文摘Tropical mountainous areas not only provide substantial carbon storage and play an important role in global biological diversity, but also provide basic livelihood for a large number of poor ethnic minorities. However, there is no unified and explicit definition for mountainous areas. The local elevation range(LER) is a crucial structural parameter for delineating mountainous areas. However, current LER products are limited by the subjective selection of an optimum statistical window or coarser spatial resolution of topographical data. In this study, we presented an approach using thresholds for three topographic parameters, elevation, slope, and LER, derived from the Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model(ASTER GDEM) to redelineate the vast mountainous areas of mainland Southeast Asia(MSEA). The mean change-point analysis method was applied to determine the optimum statistical window of the 1 arc second(approximately 30 m)-resolution GDEM LER. The results showed that: First, the optimum statistical window is 38 × 38 cell units(width × height) in a rectangular neighborhood, or an area of about 1.30 km^2 for calculating GDEM LER in MSEA. Second, the LER of more than 80% of the area ranges from 30 m to 499 m in MSEA. The LERs in the northern and northwestern MSEA are greater than their counterparts in the south and east. Third, the area of the re-delineated mountainous areas was 83.52 × 10~4 km^2, about 38.71% of the total area. Spatially, the mountainous areas are mainly distributed in the north and northeast of MSEA. The re-delineated 30-m resolution map of the mountainous areas will serve as a topographical dataset for monitoring mountainrelated land surface changes in MSEA. The parameter-modified mountain extraction procedure can be expanded to delineate global mountainous areas.
文摘The Southeast Asia Biodiversity Research Institute(SEABRI)is an international scientific research and education organization affiliated directly to the Chinese Academy of Sciences(CAS)and managed by the Xishuangbanna Tropical Botanical
基金This study is finished through the cooperation project between China Geological Survey and Department of Mineral Resources(Thailand)supported by the National Key Project for Basic Research of China(2011CB403007)+2 种基金the National Natural Science Foundation of China(41572067,91855104,41802111)the Geological Survey Project(DD20190437)"Mineral potential exploration and assessment for potash"by the Government of Thailand.
文摘The giant potash deposit on the Khorat Plateau is one of the most promising targets for exploitation of potassium salts.So far,many researches and geologic survey have been conducted on the giant potash deposits.Hence,it is necessary to make an overall review on the potash deposits.The potash deposit on the Khorat Plateau was formed during the Middle to Late Cretaceous,during which seawater was enriched in Ca2+and depleted in SO42-compared with those of modern seawater.In addition to seawater,continental water and hydrothermal fluids could have affected the evaporite basins.The seawater was probably derived from Tethys ocean,and the brine should have evaporated to some extent before entering into the basin systems based on the evidence of absence of carbonates and unproportionate sulphate compared with chloride salts.The paleo-climate during Middle to Late Cretaceous was characterized as high temperature and extremely arid environment,which is favourable for deposition of potassium-magnesium saline minerals.The major saline minerals are of anhydrite,halite,carnallite,sylvite and,tachyhydrite,with trace amounts of borates.The resources of the potash deposit on the Khorat Plateau could be approximately as much as 400×109 t of carnallite and 7×109 t of sylvite.The evaporite sequences have been deformed and altered by postdepositinal processes,including tectonic movements and chemical alteration.Salt domes were formed in the postdepositional processes.Based on the analyses of geophysical surveys and drilling projects,high-quality sylvinite ores are commonly found at the flanks of those salt domes due to incongruent dissolution of carnallite.The furure potential prospecting areas for the highquality sylvinite ores would be on the edges of the Khorat Plateau.
基金Mapping of Map series of Karst Geology in China and Southeast Asia(No.12120114006301)Research Expenses of Institute of Karst Geology,Chinese Academy of Geological Sciences(No.2014027)
文摘Based on the mapping program of the map series of karst geology in China and Southeast Asia, the paper summarizes the application of remote sensing technique and the process of acquiring information from remote sensing images. Generally, remote sensing technique serves as an effective method to recognize information about karst topography, rocky desertification and karst collapse. Interpretation of remote sensing images, in combination with field verification and cartographic generalization, provides basic data for updating the program database and compiling synthetic maps. In interpreting remote sensing images, automatic extraction can make it more efficient and visual interpretation can improve its accuracy.
文摘Seizures due to neurocysticercosis(NCC) is a neglected human-to-human transmitted disorder and an emerging problem worldwide.A substantial portion of recent onset seizures is known to be attributed to NCC in Taenia solium(T.solium) endemic areas where populations which neither raise pigs nor eat pig meat are also at risk.High prevalence of NCC causing epilepsy has been reported in the underdeveloped areas of Southeast Asia(SEA) however,only fragmentary information on its incidence is available in countries like Malaysia.In Malaysia T.solium infection was previously thought to be infrequent due to Muslim population majority and the religious prohibition of consuming pork,but it is not totally absent There is an evident lack of knowledge and awareness of the actual burden,routes of transmission,and the impact of NCC in this region.The problem is assumed to be more prevalent particularly in cities because of the frequent inflow of possibly T.solium infected individuals or carriers among those who migrate from neighboring endemic countries to Malaysia.The issue of imported cases that are likely to be emerging in Malaysia is highlighted here.An accurate quantification of regional burdens of epilepsy due to NCC in Malaysia is warranted considering the disease emergence in its neighboring countries.It is suggested that the importance of NCC be recognized through quantification of its burden,and also to collect epidemiological data for its subsequent elimination in line of World Health Organization's mission for control of cysticercosis as a neglected tropical disease.In this review the need as well as a strategy for neurc-care center screening of epilepsy cases,and various issues with possible explanations are discussed.It is also proposed that NCC be declared as a reportable disease which is one of the eradicable public health problems in SEA.
基金supported by Thailand Research Fund-Mahidol University(RSA5880062)by the Office of the Higher Education Commission and Mahidol University under the National Research Universities Initiativesupported by the Royal Golden Jubilee Ph.D.Program (Grant No.PHD/0204/2552)
文摘Objective:To understand the cause for the differences between potentially mild Southeast Asian and the more pathogenic ZIKV in South America.Methods:A comparative genomic analysis was performed to determine putative causations stemming from ZIKV.Results:Phylogcnctic analyses integrating geographical and time factors revealed that Southeast Asian ZIKV might not be the direct source of South American outbreaks as previously speculated.Amino acid residues unique to South American ZIKV isolates at the envelope,pr and NS1 proteins are listed and shown in the structural context.These unique residues on external viral proteins are not found in Southeast Asian ZIKV and could be responsible for the ongoing outbreak either via an intrinsic property of the virus or interactions with human immunity.Only a selected few primer/probe sets currently in clinical use were identified of being capable of detecting ZIKV strains worldwide.The envelope proteins of dengue virus(DENV) and ZIKV also showed a remarkable degree of similarity especially at the surface residues.Conclusions:findings that may help explain the cross-reactivity of DENV antibodies to ZIKV.Thus,major caveats must be exercised in using existing diagnostic tools for ZIKV.
基金the National Natural Science Foundation of China(grants no.31170217 and 31370268 to S.-X.Luo)the Chinese Academy of Sciences’"The Belt and Road"Master Fellowship Programme for providing P.Chheang a fully funded master’s scholarship。
文摘Glochidion(Phyllanthaceae;leafflower trees)is a genus of trees which is widely reported to be pollinated by leafflower moths(Gracillariidae:Epicephala)in temperate and subtropical Asia,Australia,and the Pacific islands.However,the pollination ecology of Glochidion is not well described from tropical Asia,the region where it is most species-rich at both local(<9 spp.)and regional(~200 spp.)scales.Here we report investigations of pollination biology and species-specificity of five Glochidion species in tropical Southeast Asia(Cambodia).Through nocturnal observations and fruit dissections,we find that at least three and likely five Glochidion species in Cambodia are pollinated by seed-parasitic leafflower moths.We find no evidence that any of these leafflower moths are non-mutualistic parasites,despite known examples of such parasites of this mutualism elsewhere in Asia.While the presence of a single larva in a fruit results in only a fraction of seeds being consumed,the presence of more than one larva per fruit-a frequent occurrence in some species—can result in almost all seeds within the fruit being infested.Multilocus phylogenetic analysis indicates that there are five different minimally monophyletic leafflower moth clades,each of which pollinates a unique Glochidion host species.Our results indicate that in its center of diversity in tropical Asia this system is an obligate pollination mutualism as previously described at the global margins of its distribution.These findings provide insights into the processes that generate and maintain biodiversity and maintain mutualism stability in plant-insect interactions in this biodiversity hotspot.
基金supported by Compilation of Karst Geological Series Maps of China and Southeast Asia of China Geological Survey (12120114006301)
文摘The compilation of serial maps of karst geology in China and Southeast Asia is a project under the 'One Belt One Road' geological survey plan granted by China Geological Survey. This paper summarized the research trend of geoscientific mapping in China and Southeast Asia and introduced the significance, contents, technical routes, operating methods and progress of the project. Through bilateral and multilateral cooperation, this project builded an international cooperation platform for mapping and completes the preliminary compilation of related karst geological maps in China and Southeast Asia, thus filling up the blank of karst geological maps in this region.
基金sponsored by China and Southeast Asia Karst Geology Series Maps Project, China Geological Survey (12120114006301)
文摘As China and Southeast Asian countries have accelerated and globalized their economic development, karst environmental problems have become increasingly prominent and studying on and compiling maps of karst geology is quite important. Therefore, based on a wide collection of data in Southeast Asian countries, a cooperative map compilation has been carried out internationally. Through comprehensive research and analysis, a unified understanding has been achieved in terms of compiling principles, contents and representing methods, Distribution of Karst in Southern China and Southeast Asia(1/5 000 000) has been compiled, which provides foundations for environmental protection and scientific studies of karst geology.
文摘1 Introduction The Southeast Asia is endowed with a diversity of mineral resources(Khin Zaw et al.,2014).Tin,copper,nickel,bauxite,chromium and potash resources are widely distributed in the Southeast Asia,show considerable economic significance,have obvious complementarity to China,and is paid wide attention by Chinese geologists and mining industry in recent years.
文摘The situation in Southeast Asia in 2017 was generally stable,as relations with China continued to improve,and progress in maritime consultations continued to develop.I.The political situation is stable and generally manageable Stability is manifested in the following aspects.The governments of the Philippines,Myanmar,Vietnam,Laos are seeking stability and good governance.
基金Scientific Research and Innovation Team Construction Project for Colleges and Universities of Sichuan Province(14TD0039).
文摘In the context of the Belt and Road Initiative,it is of great significance to study the trade ties between China and Southeast Asia with cocoon silk as a link.Trend analysis,trade competitiveness index and trade complementarity index were comprehensively used in this paper to study the competitiveness and complementarity of the cocoon silk trade between China and Southeast Asia.The results show that the export trade volume of cocoon silk of China and Southeast Asia is decreasing while fluctuating,but it is difficult for other regions to replace their export trade status in the world market.The development trend of the replacement of the silkworm cocoon trade by the raw silk trade is presented.The cocoon silk trade of China and Southeast Asia is characterized by dislocation competition.China's raw silk export trade is competitive and has become the leader of the raw silk export camp.This paper further analyzes the changes and complementarities of the cocoon silk trade competitiveness between China and Southeast Asia.
文摘The Belt and Road Initiative is set to launch a new era of trade and partnership between China and ASEAN countries,which will be extended further to Africa and Europe.China has an increasing influence in South and Southeast Asia with its support for infrastructure construction projects in local areas.CHINA and Pakistan enjoy a strong relationship.
文摘Based on the phenomenon of personal pronouns with attributives,this paper investigates the development and evolution of grammar in Southeast Asia Huayu.The results showed that the personal pronouns with attributives have shown an upward development trend in the centuries-old Huayu,as evidenced by the increasing number and frequency of their use,and the expansion of the range of personal pronouns that can carry attributives as well as the types of attributives.In addition,investigating the use of this linguistic phenomenon in Huayu,Putonghua,and Mandarin in a global perspective,it can be found that the three maintain a greater consistency.
文摘Global warming and climate change is one of the most extensively researched and discussed topical issues affecting the environment.Although there are enough historical evidence to support the theory that climate change is a natural phenomenon,many research scientists are widely in agreement that the increase in temperature in the 20 th century is anthropologically related.The associated effects are the variability of rainfall and cyclonic patterns that are being observed globally.In Southeast Asia the link between global warming and the seasonal atmospheric flow during the monsoon seasons shows varying degree of fuzziness.This study investigates the impact of climate change on the seasonality of monsoon Asia and its effect on the variability of monsoon rainfall in Southeast Asia.The comparison of decadal variation of precipitation and temperature anomalies before the 1970 s found general increases which were mostly varying.But beyond the 1970 s,global precipitation anomalous showed increases that almost corresponded with increases in global temperature anomalies for the same period.There are frequent changes and a shift westward of the Indian summer monsoon.Although precipitation is observed to be 70%below normal levels,in some areas the topography affects the intensity of rainfall.These shifting phenomenon of other monsoon season in the region are impacting on the variability of rainfall and the onset of monsoons in Southeast Asia and is predicted to delay for 15 days the onset of the monsoon in the future.The variability of monsoon rainfall in the SEA region is observed to be decadal and the frequency and intensity of intermittent flooding of some areas during the monsoon season have serious consequences on the human,financial,infrastructure and food security of the region.
基金Under the auspices of the Special Research Fund of China-ASEAN Collaborative Innovation Center for Regional Development and Development Program of Ministry of Education for Changjiang Scholars and Innovative Teams(No.CW201501)
文摘A quantitative approach to the national geopolitical influence is helpful to provide a reference for national sustainable development on the international stage, based on describing national diplomatic capacity and overseas influence. Herein, this study proposes a complex geopolitical influence model, considering the affected nations' response. The geopolitical influences of great power in the affected nation are correlated with overall strength, the acceptance degree of the affected nation to the great power and the distance between both sides. Then, the geopolitical influences of China and the US in Southeast Asia countries are empirically analyzed from 2005 to 2015. The geopolitical influence of China in Southeast Asia has been largely growing for the past decades, accompanying with a constant trend of the US' effects. It is believed that China and the US can coexist peacefully in Southeast Asia to promote the regional development, and jointly create an open, inclusive and balanced regional cooperation architecture that benefits all nations in this region and great powers, through mutual political trust and economic beneficial cooperation. This study may contribute to advancing the policy debate and determining the optimal cooperation in pledging commitment to a new and sustainable model of great power relationship among the various regional geopolitical options.
文摘Since the initial description, the name Musa aurantiaca Baker (1893) has been unclear to most botanists. The aim of this study is to settle its true identity and to update the description. The plant is distributed in the regions of Upper Assam and Arunachal Pradesh, India, Northern Myanmar and Tibet, China where it occurs commonly but it is not mentioned in Chinese literature at all. In this paper, the authors also review the description and the literature history of M. aurantiaca from 1893 to the present. Musa aurantiaca Baker is typified here.
基金supported by Kasetsart University research grant (No. 28.56) from the Kasetsart University Research and Development Institute (KURDI)ScRF grant (No. S14/2555) from Faculty of Science, Kasetsart University+1 种基金Support for Cameron D. SILER to develop new international collaborations with the Amphibians and Reptiles Ecology LaboratoryKasetsart University was supported by international travel grants provided by the Department of Biology and College of Arts and Sciences at the University of Oklahoma
文摘Although landscape features such as mountains and rivers are recognized often as limiting factors to amphibian dispersal and gene flow, a limited number of studies have investigated such patterns across Southeast Asia. A perfect example of this is Thailand, located in one of the world's biodiversity hotspot regions. Thailand represents the corridor between mainland Asia and the Sunda Shelf, a famous and widely recognized biogeographic region, and yet there are few studies on the genetic structure among populations of amphibian species distributed across Thailand. The Southeast Asian tree frog, Chiromantis hansenae has been reported to possess a geographic range that is restricted to Thailand and, presumably, Cambodia. Here, we investigate phylogenetic relationships among C. hansenae populations using partial sequences of the mitochondrial 16 S rRNA gene and nuclear POMC gene. Our results reveal two distinct evolutionary lineages within C. hansenae populations in Thailand. The genetic divergence among populations between these two clades is considerable, and results support inter-population divergence, and high genetic differentiation(pairwise FST = 0.97), between two localities sampled in western Thailand(TK1 and TK2), separated from each other by 40 kilometers only. The results suggest that landscape features across Thailand may have a profound impact on patterns of diversification in the country, underscoring the urgent need for fine-scale investigations of genetic structure of endemic and "widespread" species.
文摘Since the initial description, the name Musa dasycarpa Kurz (1867) has been unclear to most botanists. It has usually been synonymized with M. velutina H. Wendl. & Drude (1875). However, although the original diagnosis was very short, 'fruits hairy', it is adequate. Thus, according to Vienna Codes, M. dasycarpa Kurz has priority over M. velutina H. Wendl. & Drude. The aim of this study is to settle the true identity and to update the description of M. dasycarpa Kurz. For that purpose the names M. dasycarpa and M. velutina are typified. In addi-tion, critical notes regarding M. assamica Bull. are given; it is neotypified here, and considered as conspecific with M. sanguinea Hook. f.
