Effect of environmental factors on distribution of stream macroalgae in Niangziguan Spring in Shanxi Province, North China

2012 ◽  
Vol 11 (18) ◽  
Author(s):  
Shi Ying
Keyword(s):  
Environmental Factors ◽  
North China ◽  
Shanxi Province ◽  
Stream Macroalgae

scholarly journals Ecological determinants of effect of a free pit and fissure sealant program in Shanxi, China, 2017–2018

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Xiangyu Wang ◽  
Wenjuan Ren ◽  
Yufang Li ◽  
Bin Zhao ◽  
Tingting Yang ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Spatial Heterogeneity ◽  
North China ◽  
Retention Rate ◽  
Explanatory Power ◽  
Ecological Factors ◽  
Retention Rates ◽  
Shanxi Province ◽  
Medical Resources ◽  
The Government

Abstract Background The aim of this study is to explore the spatial heterogeneity of the retention of PFS in children aged 7–9 years in Shanxi Province, North China and investigate the risk factors associated with PFS retention. Methods In this study, 937 children aged 7–9 years from Shanxi Province, China were randomly selected, all of whom had at least one first permanent tooth sealed with PFS in 2016. The children were surveyed after 12 months (in 2017) and 24 months (in 2018). The Geo-detector model was used to explore the spatial heterogeneity of the retention rate of PFS and analyze the influence and interactions of the ecological factors on PFS. Results 3299 teeth from 937 children were analyzed. The PFS full retention rates after 12 months (in 2017) and 24 months (in 2018) were 81.6% and 75.1%, respectively. The incidence of caries of the first molar was 2.1% after 12 months and 5.4% after 24 months. The spatial heterogeneity of the PFS retention rate after 24 months was significant, which was shown as the retention rate of PFS increased from north to south after 24 months. Remarkably, the natural environmental factors exerted greater influence than the socioeconomic and medical resources factors after 12 months, where the interaction of fluorine in water (FW) had the strongest explanatory power of 52% (P < 0.05). The medical resources were important ecological factors after 24 months, and the percentage of medical technicians (PMT) had the strongest explanatory power of 70% (P < 0.05). Conclusion The natural environmental factors and medical resources factors are important ecological factors determining the spatial pattern. The government should strengthen medical and technician construction in North China, comprehensively control fluoride in water, optimize the allocation of medical resources, and promote the balanced development of regional medicine.

Association of exposure to ambient air pollution with ovarian reserve among women in Shanxi province of north China

2021 ◽  
Vol 278 ◽  
pp. 116868
Author(s):  
Xiaoqin Feng ◽  
Jinhong Luo ◽  
Xiaocheng Wang ◽  
Wolong Xie ◽  
Jiao Jiao ◽  
...  
Keyword(s):  
Air Pollution ◽  
Ovarian Reserve ◽  
North China ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Shanxi Province

scholarly journals Groundwater Quality and Potential Human Health Risk Assessment for Drinking and Irrigation Purposes: A Case Study in the Semiarid Region of North China

Water ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 783
Author(s):  
Feifei Chen ◽  
Leihua Yao ◽  
Gang Mei ◽  
Yinsheng Shang ◽  
Fansheng Xiong ◽  
...  
Keyword(s):  
Groundwater Quality ◽  
Human Health ◽  
Health Risks ◽  
North China ◽  
Shanxi Province ◽  
Hydrochemical Characteristics ◽  
Human Health Risks ◽  
Drinking And Irrigation ◽  
Hydrochemical Types ◽  
Potential Human Health

Groundwater is a valuable water source for drinking and irrigation purposes in semiarid regions. Groundwater pollution may affect human health if it is not pretreated and provided for human use. This study investigated the hydrochemical characteristics driving groundwater quality for drinking and irrigation purposes and potential human health risks in the Xinzhou Basin, Shanxi Province, North China. More specifically, we first investigated hydrochemical characteristics using a descriptive statistical analysis method. We then classified the hydrochemical types and analyzed the evolution mechanisms of groundwater using Piper and Gibbs diagrams. Finally, we appraised the groundwater quality for drinking and irrigation purposes using the entropy water quality index (EWQI). We assessed the associated human health risks for different age and sex groups through drinking intake and dermal contact pathways. Overall, we found that (1) Ca-HCO3 and Ca·Mg-HCO3 were the dominant hydrochemical types and were mainly governed by rock weathering and water–rock interactions. (2) Based on the EWQI classifications, 67.74% of the groundwater samples were classified as medium quality and acceptable for drinking purpose. According to the values of sodium adsorption ratio (SAR), residual sodium carbonate (RSC) and soluble sodium percentage (%Na), 90.32% of the samples were suitable for irrigation, while the remaining samples were unfit for irrigation because of the high salinity in the groundwater. (3) Some contaminants in the groundwater, such as NO3−, NO2− and F−, exceeded the standard limits and may cause potential risks to human health. Our work presented in this paper could establish reasonable management strategies for sustainable groundwater quality protection to protect public health.

Morphological and molecular characteristics of Bastiania sinensis sp. n., Tripyla aquatica Brzeski & Winiszewska-Ślipińska, 1993 and T. setifera Bütschli, 1873 (Nematoda: Triplonchida) from Shanxi Province, North China

Nematology ◽  
2021 ◽  
pp. 1-23
Author(s):  
Mei Na Liu ◽  
Yu Mei Xu ◽  
Zeng Qi Zhao ◽  
Jian Ming Wang
Keyword(s):  
North China ◽  
Large Subunit ◽  
Small Subunit ◽  
Rrna Genes ◽  
Shanxi Province ◽  
Molecular Characteristics ◽  
Separate Species ◽  
Using Data ◽  
First Time ◽  
Respective Species

Summary This paper describes a new species of Bastiania, presents a new record and redescribes a known species of Tripyla. These nematodes are all in the order Triplonchida and were collected from Shanxi Province, North China. Bastiania sinensis sp. n. is characterised by having the female with a relatively slender body 1049-1295 μm long, dorsally arcuate after heat relaxation, with outer labial setae and cephalic setae in a single circle, an oval amphid, 7-8 laterodorsal cervical setae scattered in the pharyngeal region, orthometamenes and pseudocoelomocytes present, tail conoid with a mucron 1-2 μm long, two pairs of caudal setae present, a = 58.1-75.5, b = 4.0-4.6, c = 12.7-19.7, c′ = 4.1-7.8 and V = 61.1-67.7. Males were not found. Tripyla aquatica is recorded for the first time from China, and is redescribed. Tripyla setifera has been reported from China but without a detailed description – now provided. In addition, phylogenetic relationships among the species were analysed using data from the near full length small subunit (SSU) and D2-D3 segments of large subunit (LSU) of rRNA genes. Bastiania sinensis sp. n. is monophyletic with the Bastiania sequences available in GenBank, but is on an independent branch supporting its status as a separate species; T. aquatica and T. setifera are monophyletically clustered with known Tripyla species and grouped together with sequences from their respective species.

Late Carboniferous-Early Permian palynology of Baode (Pao-te-chou) in Shanxi Province, North China

2008 ◽  
Vol 43 (4) ◽  
pp. 487-510 ◽  
Author(s):  
Liu Feng ◽  
Zhu Huaicheng ◽  
Ouyang Shu
Keyword(s):  
North China ◽  
Late Carboniferous ◽  
Shanxi Province ◽  
Early Permian

Environmental reconstruction and dating of Shizitan 29, Shanxi Province: An early microblade site in north China

2017 ◽  
Vol 79 ◽  
pp. 19-35 ◽  
Author(s):  
Yanhua Song ◽  
David J. Cohen ◽  
Jinming Shi ◽  
Xiaohong Wu ◽  
Eliso Kvavadze ◽  
...  
Keyword(s):  
North China ◽  
Shanxi Province ◽  
Environmental Reconstruction

scholarly journals Spatial and temporal distribution of stream macroalgae in a tropical river basin

2015 ◽  
Vol 15 (4) ◽  
Author(s):  
Aurélio Fajar Tonetto ◽  
Cleto Kaveski Peres ◽  
Rafael Taminato Hirata ◽  
Ciro Cesar Zanini Branco
Keyword(s):  
Environmental Factors ◽  
Light Availability ◽  
Temporal Distribution ◽  
Southeastern Brazil ◽  
Spatial And Temporal Variation ◽  
Major Influence ◽  
Spatial And Temporal Distribution ◽  
Tropical River ◽  
Stream Macroalgae ◽  
One Year

Spatial and temporal distribution of stream macroalgae in streams from southeastern Brazil were assessed for one year. The fluctuations in macroalgal species composition and environmental factors were monitored monthly. The region exhibit a tropical climate, with defined rainy and dry seasons. Nineteen species were found, with a predominance of Chlorophyta (52.7% of the species), followed by Cyanobacteria (26.3%), Ochrophyta and Rhodophyta (10.5% each). Scytonema arcangeli had the highest number of records (63.6%), while Mougeotia capucina occurred in all sampling sites. Community structure had low similarity (20-26%) and the environmental factors showed a weak contribution to the distribution pattern observed. Despite this, the light availability at the stream-bed seems to be a major influence on the macroalgal seasonal dynamics. We suggest that macroalgae communities are predominantly composed of rare species, and this could explain the lack of a clear spatial and temporal variation pattern of these organisms.

Giant cordaitalean trees in early Permian riparian canopies in North China: Evidence from anatomically preserved trunks in Yangquan, Shanxi Province

Palaeoworld ◽  
2020 ◽  
Vol 29 (3) ◽  
pp. 469-475
Author(s):  
Ming-Li Wan ◽  
Wan Yang ◽  
Shan Wan ◽  
Dan-Dan Li ◽  
Wei-Ming Zhou ◽  
...  
Keyword(s):  
North China ◽  
Shanxi Province ◽  
Early Permian
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