scholarly journals The spatial-temporal distributions of controlling factors on vegetation growth in Tibet Autonomous Region, Southwestern China

2019 ◽  
Vol 1 (9) ◽  
pp. 091003
Author(s):  
Guangyong You ◽  
M Altaf Arain ◽  
Shusen Wang ◽  
Shawn McKenzie ◽  
Changxin Zou ◽  
...  
Phytotaxa ◽  
2014 ◽  
Vol 167 (3) ◽  
pp. 223 ◽  
Author(s):  
GUANG-YAN WANG ◽  
YING MENG ◽  
TAO DENG ◽  
YONG-PING YANG

Faberia is a perennial herbaceous member of Asteraceae that is mainly distributed in central and southwestern China. Nuclear (ITS) and plastid (psbA–trnH, rbcL, matK, and trnL–F) sequences representing five Faberia species were analyzed with maximum parsimony, maximum likelihood, and Bayesian inference, all of which strongly supported the monophyly of Faberia. Faberia nanchuanensis, F. cavaleriei, and F. faberi from central China form a well-supported clade. Additionally, F. sinensis and F. thibetica from southwestern China also form a well-supported clade. Incongruence between nuclear and plastid fragments was interpreted as hybridization or limited character evolution in the plastid DNA. Faberia may have descended from hybridization between Lactucinae and Crepidinae. Besides phylogenetic results, Faberia nanchuanensis is recorded for the first time from Hunan Province, and F. sinensis from the Tibet Autonomous Region.


2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Ying Wang ◽  
Bing-Cheng Ma ◽  
Li-Ying Wang ◽  
Gongsang Quzhen ◽  
Hua-Sheng Pang

Abstract Background Echinococcosis is highly endemic in western and northern China. Tibet Autonomous Region (TAR) is the most serious prevalent area. Linzhi is located in southeastern part of TAR. Dogs are the primary infection source for the transmission of echinococcosis to humans. A control and prevention campaign based on dog management has been implemented in the past three years. This study aims to evaluate the effects of dog management on the infection rate of dogs. Methods Data of dog population, registration and de-worming of seven counties/district in Linzhi between 2017 and 2019 were obtained from the annual prevention and control report. Domestic dog fecal samples were collected from each endemic town of seven counties/district in Linzhi in 2019 to determine the infection of domestic dogs using coproantigen enzyme-linked immunosorbent assay (ELISA). Data analysis was processed using SPSS statistics to compare dog infection rate between 2016 and 2019 by chi-square test, and maps were mapped using ArcGIS. Results In Linzhi, domestic dog population has decreased from 17 407 in 2017 to 12 663 in 2019, while the registration rate has increased from 75.9% in 2017 to 98.6% in 2019. Similarly, stray dog population has decreased from 14 336 in 2017 to 11 837 in 2019, while sheltered rate has increased from 84.6% in 2017 to 96.6% in 2019. Dog de-worming frequency has increased from 4 times per annum in 2017 to 12 times in 2019, indicating that approximately every dog was dewormed monthly. A total of 2715 dog fecal samples were collected for coproantigen ELISA assay. The dog infection rate was 2.8% (77/2715) in 2019, which was significantly lower than 7.3% (45/618) in 2016 (P < 0.05). Conclusions Increased dog registration, decreased dog population, and increased dog de-worming frequency contributed to significantly decrease the dog infection rate in Linzhi. Control and prevention campaign based on dog management could significantly decrease dog infection with Echinococcus spp. in echinococcosis endemic areas.


Zootaxa ◽  
2018 ◽  
Vol 4388 (3) ◽  
pp. 444
Author(s):  
RAORAO MO ◽  
GUOQUAN WANG ◽  
DING YANG ◽  
WEIHAI LI

Two leuctrid species of the Rhopalopsole magnicerca group are described as new, R. brevicula sp. nov. and R. jizushana sp. nov. from the Guangxi Autonomous Region of southern China, bordering Vietnam and Yunnan Province of southwestern China, respectively. The new species are compared with related taxa. 


2020 ◽  
pp. 1-6
Author(s):  
Yan Wang ◽  
Zong-hui Dang ◽  
Liang-ying Gan ◽  
Ciren Luobu ◽  
Lei Zhang ◽  
...  

Background: It is known that hypoxia influences many of the biologic processes involved in erythropoiesis; therefore, the high-altitude hypoxia may affect erythropoietin (EPO) responsiveness in maintenance hemodialysis (MHD) patients. This study aimed to evaluate the impact of altitude on EPO responsiveness in MHD patients. Methods: In this retrospective study, MHD patients from Tibet Autonomous Region People’s Hospital (3,650 m above sea level) and Peking University People’s Hospital (43.5 m above sea level) were recruited between May 2016 and December 2018. Patients were divided into 2 groups according to altitude. Variables including age, sex, dialysis vintage, dialysis modality, duration of EPO use, EPO doses, and laboratory tests were collected and analyzed. EPO responsiveness was measured in terms of the EPO resistance index (ERI). ERI was defined as the weekly weight-adjusted dose of EPO (IU/kg/week) divided by hemoglobin concentration (g/dL). The association between ERI and altitude was estimated using a multivariable linear regression model. Results: Sixty-two patients from Tibet Autonomous Region People’s Hospital (high-altitude [HA] group) and 102 patients from Peking University People’s Hospital (low-altitude [LA] group) were recruited. The ERI for HA group and LA group was 6.9 ± 5.1 IU w−1 kg−1 (g/dL)−1 and 11.5 ± 6.4 IU w−1 kg−1 (g/dL)−1, respectively. After adjusting for covariates by multivariable regression, altitude was independently associated with ERI (R2 = 0.245, p < 0.001). Conclusion: Altitude had an independent negative correlation with ERI. This result supported the hypothesis that altitude-associated hypoxia improved EPO responsiveness in MHD patients.


2021 ◽  
Vol 80 (24) ◽  
Author(s):  
Xian Li ◽  
Yixian Wang ◽  
Longcang Shu ◽  
Yanqiao Wang ◽  
Fang Tong ◽  
...  

ZooKeys ◽  
2020 ◽  
Vol 985 ◽  
pp. 61-70
Author(s):  
Guo-Xi Xue ◽  
Yutaka Inayoshi ◽  
Meng Li ◽  
Fu-Ming Zhang ◽  
Da-Kun Lai ◽  
...  

Celaenorrhinus pyrrha de Nicéville, 1889, a rare species of Hesperiidae previously known to be distributed from northeastern India to Indochina, is reported from southwestern Yunnan and southwestern Chongqing, China. A 658 bp COI gene sequence of this species is published for the first time. Although Chongqing is obviously isolated from the main distribution range, morphological characters of the specimens from this locality do not indicate a subspecies differentiation. Another rare taxon, C. munda munda (Moore, 1884), is also recorded from China for the first time based upon a male specimen from Cuona County in the Tibet Autonomous Region. This is the second specimen of C. munda from China, over 100 years after the holotype of C. munda joka Evans, 1949. The genitalia of both species are illustrated and described. Some taxonomic notes and a distribution map are provided as well.


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