scholarly journals The Mossflora of Xishuangbanna, Southern Yunnan, China

1992 ◽  
Vol 5 (1) ◽  
pp. 27-33
Author(s):  
Pan-cheng Wu
Keyword(s):  
Southeast Asia ◽  
Yunnan Province ◽  
Tropical Areas

This is the first contribution on the moss flora of Xishuangbanna, southern Yunnan Province, one of the main tropical areas in China. This rich moss flora shows a similarity to that of Southeast Asia and the Himalayas.

A review of the non-lyctine powder-post beetles of Yunnan (China) with a new genus and new species (Coleoptera: Bostrichidae)

Zootaxa ◽  
2022 ◽  
Vol 5091 (4) ◽  
pp. 501-545
Author(s):  
YI-FENG ZHANG ◽  
LING-ZENG MENG ◽  
ROGER A. BEAVER
Keyword(s):  
New Species ◽  
Southeast Asia ◽  
Yunnan Province ◽  
New Genus ◽  
Southwest China ◽  
Geological History ◽  
Yunnan Region ◽  
Palearctic Region ◽  
History Of ◽  
First Time

The powder post beetles (Coleoptera: Bostrichidae) (except Lyctinae) of Yunnan Province in Southwest China are reviewed for the first time. Keys to twenty-six genera and fifty-two species from the Yunnan region are provided. One new genus and seven new species are described: Dinoderus (Dinoderastes) hongheensis sp. nov., Dinoderus (Dinoderastes) nanxiheensis sp. nov., Gracilenta yingjiangensis gen. nov., sp. nov., Calonistes vittatus sp. nov., Calophagus colombiana sp. nov., Xylodrypta guochuanii sp. nov. and Xylodrypta zhenghei sp. nov.. Fourteen species are recorded in China for the first time. The bostrichid fauna of Yunnan is compared with those of the neighbouring bio-geographically related Southeast Asian and Himalayan regions. The fauna has a close affinity with that of tropical Southeast Asia and a much weaker relationship with the Palearctic region. The differences with the Himalayas may reflect the separate evolutionary and complex geological history of the two areas.

scholarly journals Filariasis presenting as an upper arm swelling – an unusual presentation

2018 ◽  
Vol 8 (1) ◽  
pp. 1317-1319 ◽  
Author(s):  
Purbesh Adhikari ◽  
Paricha Upadhyaya ◽  
Sushil Dhakal ◽  
Mona Dahal ◽  
Soorya Bhattarai
Keyword(s):  
Southeast Asia ◽  
Rare Event ◽  
Public Health Problem ◽  
Major Public Health Problem ◽  
Upper Arm ◽  
Asymptomatic Patients ◽  
Arm Swelling ◽  
Tropical Areas ◽  
High Index Of Suspicion ◽  
Healthy Carriers

Filariasis is a chronic disabling parasitic disease causing a major public health problem in tropical areas of Southeast Asia. It is endemic in India, China, Nepal, Indonesia, parts of Asia and Africa. In Southeast Asia it is caused mainly by W. bancrofti and Brugia species. Microfilaria is known to be present in cytology smears prepared from swelling at various sites and also in different body fluids. However, upper arm swelling as a clinical presentation of filariasis is a very rare event. If cytology smears are screened with high index of suspicion in this group of otherwise asymptomatic patients, early institution of proper treatment can both prevent the complication of the disease as well as break the chain of transmission from healthy carriers.

scholarly journals A novel SARS-CoV-2 related coronavirus in bats from Cambodia

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Deborah Delaune ◽  
Vibol Hul ◽  
Erik A. Karlsson ◽  
Alexandre Hassanin ◽  
Tey Putita Ou ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Geographic Distribution ◽  
Yunnan Province ◽  
Nucleotide Identity ◽  
Metagenomic Sequencing ◽  
Genomic Regions

AbstractKnowledge of the origin and reservoir of the coronavirus responsible for the ongoing COVID-19 pandemic is still fragmentary. To date, the closest relatives to SARS-CoV-2 have been detected in Rhinolophus bats sampled in the Yunnan province, China. Here we describe the identification of SARS-CoV-2 related coronaviruses in two Rhinolophus shameli bats sampled in Cambodia in 2010. Metagenomic sequencing identifies nearly identical viruses sharing 92.6% nucleotide identity with SARS-CoV-2. Most genomic regions are closely related to SARS-CoV-2, with the exception of a region of the spike, which is not compatible with human ACE2-mediated entry. The discovery of these viruses in a bat species not found in China indicates that SARS-CoV-2 related viruses have a much wider geographic distribution than previously reported, and suggests that Southeast Asia represents a key area to consider for future surveillance for coronaviruses.

Latest 30-m map of mature rubber plantations in Mainland Southeast Asia and Yunnan province of China: Spatial patterns and geographical characteristics

2021 ◽  
pp. 030913332098374
Author(s):  
Chiwei Xiao ◽  
Peng Li ◽  
Zhiming Feng ◽  
Yanzhao Yang ◽  
Zhen You ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Yunnan Province ◽  
Vegetation Index ◽  
Southern China ◽  
Landsat 8 ◽  
Rubber Plantations ◽  
National Differences ◽  
Northern Edge ◽  
The Tropics ◽  
Mainland Southeast Asia

Knowledge of the location, area and extent of rubber plantations is a prerequisite for assessing their ecological and environmental impacts. Mainland Southeast Asia (MSEA) and Yunnan province (MSEA&YN) in China are globally important rubber-planting regions. Rubber cultivation in areas at moderate and low altitudes (<1000 m) within these regions has expanded rapidly in recent years. However, datasets of maps generated at a fine spatial resolution are still unavailable for MSEA&YN. Because of this, three relevant and important questions remain unanswered: what are the northernmost boundary for rubber production in these regions, what is the highest altitude at which rubber is produced, and how are the plantations distributed in (cross-) border regions? An approach of the phenology- and Landsat-based re-normalized vegetation index (RNVI), originally developed for Xishuangbanna in southern China, is used in this study to verify the feasibility of mapping mature rubber plantations in MSEA&YN using the Landsat 8 Operational Land Imager data products acquired from January to April, 2013 to 2018. Characteristics of the vertical and horizontal distributions of mature rubber plantations in MSEA&YN, as well as national differences especially in the (cross-) borders, were examined using the generated map. The results showed that the RNVI method, although tailored to the northern edge of the tropics, is useful for detecting mature rubber plantations in MSEA&YN. The latest map of mature rubber plantations indicated that they occupied a total area of 7.69 × 106 ha, accounting for 3.32% of the study area. Spatial analyses showed three typical features of the distribution: new plantations at higher (over 1000 m) and lower (below 200 m) elevations, more cultivation in the borderlands (over a half within 60 km buffers), and their northward movement (as far as 25°N). The results of this study have important implications for phenological methods verification in the tropics, and provide valuable information on mature rubber plantations in MSEA&YN.

India-Myanmar Relations

2017 ◽  
Author(s):  
Frédéric Grare
Keyword(s):  
Southeast Asia ◽  
Regional Integration ◽  
Yunnan Province ◽  
The United States ◽  
Transport Infrastructure ◽  
The Political ◽  
New Delhi ◽  
Ethnic Conflicts ◽  
Transport Project ◽  
The Relationship

The search for greater connectivity with Southeast Asia is driving the evolution of the relationship between India and Myanmar. A partnership with Naypyidaw could help India’s integration with the more dynamic economies of Southeast Asia as well as with the dynamic Yunnan province in China. In doing so, India also expects to contain China’s influence in Myanmar. Transport infrastructure projects, including the Kaladan Multi-Modal Transit Transport Project, are being developed in Myanmar that may help India achieve its objectives. But numerous obstacles including ethnic conflicts in the country as well as relative mistrust between New Delhi and Naypyidaw may inhibit regional integration through Myanmar. India moreover faces competition from countries with much larger capacities such as Japan and the United States, which on one hand may help diminish China’s influence but also diminish the political space available for India.

scholarly journals Identification of novel bat coronaviruses sheds light on the evolutionary origins of SARS-CoV-2 and related viruses

2021 ◽  
Author(s):  
Hong Zhou ◽  
Jingkai Ji ◽  
Xing Chen ◽  
Yuhai Bi ◽  
Juan Li ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Yunnan Province ◽  
Gene Sequence ◽  
Southern China ◽  
Geographic Region ◽  
Spike Gene ◽  
Diarrhea Virus ◽  
Wildlife Species ◽  
Evolutionary Origins ◽  
Diarrhea Syndrome

SummaryAlthough a variety of SARS-CoV-2 related coronaviruses have been identified, the evolutionary origins of this virus remain elusive. We describe a meta-transcriptomic study of 411 samples collected from 23 bat species in a small (~1100 hectare) region in Yunnan province, China, from May 2019 to November 2020. We identified coronavirus contigs in 40 of 100 sequencing libraries, including seven representing SARS-CoV-2-like contigs. From these data we obtained 24 full-length coronavirus genomes, including four novel SARS-CoV-2 related and three SARS-CoV related genomes. Of these viruses, RpYN06 exhibited 94.5% sequence identity to SARS-CoV-2 across the whole genome and was the closest relative of SARS-CoV-2 in the ORF1ab, ORF7a, ORF8, N, and ORF10 genes. The other three SARS-CoV-2 related coronaviruses were nearly identical in sequence and clustered closely with a virus previously identified in pangolins from Guangxi, China, although with a genetically distinct spike gene sequence. We also identified 17 alphacoronavirus genomes, including those closely related to swine acute diarrhea syndrome virus and porcine epidemic diarrhea virus. Ecological modeling predicted the co-existence of up to 23 Rhinolophus bat species in Southeast Asia and southern China, with the largest contiguous hotspots extending from South Lao and Vietnam to southern China. Our study highlights both the remarkable diversity of bat viruses at the local scale and that relatives of SARS-CoV-2 and SARS-CoV circulate in wildlife species in a broad geographic region of Southeast Asia and southern China. These data will help guide surveillance efforts to determine the origins of SARS-CoV-2 and other pathogenic coronaviruses.

Ancylostoma ceylanicum as the second most frequent hookworm species isolated in France in travellers returning from tropical areas

2021 ◽  
Author(s):  
Victor Gerber ◽  
Yohann Le Govic ◽  
Cécile Ramade ◽  
Cathy Chemla ◽  
Samia Hamane ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Multicenter Study ◽  
Ancylostoma Ceylanicum ◽  
Tropical Areas

Ancylostoma ceylanicum is the second most common hookworm species infecting humans in Southeast Asia and Oceania. We performed a 3 years multicenter study to assess its frequency in hookworm infecting patients returning from tropical areas to France and found that A. ceylanicum was the second most frequent hookworm species isolated.

Cheirostylis acuminata (Orchidaceae; Cranichideae; Goodyerinae): a new species from Yunnan Province, China

Phytotaxa ◽  
2016 ◽  
Vol 247 (2) ◽  
pp. 138
Author(s):  
ZHI-LONG LIU ◽  
QIANG LIU ◽  
JIANG-YUN GAO
Keyword(s):  
New Species ◽  
Southeast Asia ◽  
Yunnan Province ◽  
Pacific Islands ◽  
Tropical Africa ◽  
A New Species

Cheirostylis Blume (1825: 413) is characterized by a column with two stelids, two well-separated stigma lobes and connate sepals that form a tube. There are about 55 species, mainly distributed in tropical Africa, through Southeast Asia, Japan, Indonesia and Pacific islands to Australia (Pridgeon et al. 2003, Chen et al. 2009, Bhattacharjee 2012, Govaerts et al. 2012). There are 18 species reported from China, of which 8 species are believed to be endemic (Averyanov et al. 2009, Chen et al. 2009, Lin & Lin 2009, Yang et al. 2013).

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