Controlling effects of surface crusts on water infiltration in an arid desert area of Northwest China

2016 ◽  
Vol 16 (10) ◽  
pp. 2408-2418 ◽  
Author(s):  
Jin-Ling Yang ◽  
Gan-Lin Zhang ◽  
Fei Yang ◽  
Ren-Min Yang ◽  
Chen Yi ◽  
...  
Keyword(s):  
Northwest China ◽  
Water Infiltration ◽  
Desert Area ◽  
Arid Desert

scholarly journals The annual total artesian water diversion plan of 300billion Square meters in the arid desert area of northwest China

2020 ◽  
Vol 4 (2) ◽  
pp. 62-65
Author(s):  
Zhenqiang Huang
Keyword(s):  
National Economy ◽  
Central Government ◽  
Water Shortage ◽  
Northwest China ◽  
Water Diversion ◽  
Desert Area ◽  
Construction Period ◽  
Annual Total ◽  
Artesian Water ◽  
Arid Desert

The water shortage in the arid desert area of northwest China has seriously restricted the healthy, balanced and sustainable development of the national economy. In the arid desert area of northwest China, the total budget of the full artesian water diversion project of 300billion square meters per year is less than 3trillion yuan, and the construction period is less than 10years. Hope the central government, Ministry of Water Resources, ministry of agriculture, ministry of water and power. And other major national economy and people's livelihood related departments and many experts and scholars, people with lofty ideals to pay high attention in a timely manner.

scholarly journals Male parent birds exert more effort to reproduce in two desert passerines

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Donghui Ma ◽  
Mengjie Lu ◽  
Zhichang Cheng ◽  
Xingnan Du ◽  
Xiaoyu Zou ◽  
...  
Keyword(s):  
Reproductive Output ◽  
Female Parent ◽  
Northwest China ◽  
Reproductive Behaviour ◽  
Male Parent ◽  
Hatching Rate ◽  
Feeding Rates ◽  
Passerine Species ◽  
Arid Desert ◽  
Habitat Environment

Abstract Background Parental investment by birds is limited by the habitat environment, and a male parent increases its effort to reproduce in birds that live in high-altitude areas. Methods A study of the reproductive behaviour of the Saxaul Sparrow (Passer ammodendri) and the Isabelline Shrike (Lanius isabellinus) was carried out at the Gansu An’xi Extremely Arid Desert National Nature Reserve in northwest China to determine the reproductive input of passerine species in desert habitats. Results In Saxaul Sparrows, compared to the female parent, the male parent exhibited a significantly higher frequency of nest-defense behaviour (chirping and warning) during nesting, hatching and feeding periods. In addition, in comparison to the female parent, the male parent exhibited almost equal frequencies of nesting and incubation but fed nestlings significantly more times. Similar to the male sparrows, the feeding rates of the male Isabelline Shrikes were significantly higher than those of the females. The hatching rate and fledging rate of the Saxaul Sparrow on average in this study were 81.99 and 91.92%, respectively, while those of the shrike were 69.00 and 96.53%, respectively. Conclusions These two different passerine species living in the same desert environment exhibited the same trend in their reproductive investments. Adapting to desert environments is a strategy that may have evolved in passerines where male parent birds put more effort than females into reproduction to ensure high reproductive output.

scholarly journals Analysis of land cover change and its driving forces in a desert oasis landscape of Xinjiang, northwest China

Solid Earth ◽  
2014 ◽  
Vol 5 (2) ◽  
pp. 1071-1085 ◽  
Author(s):  
T. Amuti ◽  
G. Luo
Keyword(s):  
Land Cover ◽  
Land Degradation ◽  
Driving Forces ◽  
Northwest China ◽  
Landsat Images ◽  
Desert Oasis ◽  
Standard Classification ◽  
Effects Of Drought ◽  
Arid Desert ◽  
Southern Xinjiang

Abstract. The combined effects of drought, warming and the changes in land cover have caused severe land degradation for several decades in the extremely arid desert oases of southern Xinjiang, northwest China. Land cover classifications of Landsat images in 1990, 2000 and 2008 were performed based on the multistage supervised classification scheme using the maximum likelihood classifier integrated with conventional vegetation and soil indexes, which improved overall accuracies by 4–5% compared to the standard classification method. Based on the detection of changes in land cover during 1990–2008 using remote sensing (RS) and a geographic information system (GIS), it can be found that the oasis significantly (+35%) increased, while the area of ecotone decreased (−43%). The major trends of the land cover changes were the notable growth of the oasis and the reduction of the desert–oasis ecotone. These changes were mainly a result of the intensified human activities such as land and water exploitation as well as overgrazing. The results of this study indicate that the oasis environment will be deteriorated by increase in potential areas of land degradation if the trend of desert moving further inward and the shrinking of the ecotone continues over the next decades.

Vineyard evaporative fraction based on eddy covariance in an arid desert region of Northwest China

2008 ◽  
Vol 95 (8) ◽  
pp. 937-948 ◽  
Author(s):  
Sien Li ◽  
Shaozhong Kang ◽  
Fusheng Li ◽  
Lu Zhang ◽  
Baozhong Zhang
Keyword(s):  
Eddy Covariance ◽  
Northwest China ◽  
Evaporative Fraction ◽  
Desert Region ◽  
Arid Desert

Sap flow dynamics ofPopulus albaL.×P.talassicaplantation in arid desert area

2013 ◽  
Vol 33 (18) ◽  
pp. 5655-5660 ◽  
Author(s):  
张俊 ZHANG Jun ◽  
李晓飞 LI Xiaofei ◽  
李建贵 LI Jiangui ◽  
王华 WANG Hua ◽  
黄春堂 HUANG Chuntang ◽  
...  
Keyword(s):  
Sap Flow ◽  
Flow Dynamics ◽  
Desert Area ◽  
Arid Desert

Soil texture controls vegetation biomass and organic carbon storage in arid desert grassland in the middle of Hexi Corridor region in Northwest China

Soil Research ◽  
2015 ◽  
Vol 53 (4) ◽  
pp. 366 ◽  
Author(s):  
Yongzhong Su ◽  
Jiuqiang Wang ◽  
Rong Yang ◽  
Xiao Yang ◽  
Guiping Fan
Keyword(s):  
Organic Carbon ◽  
Soil Texture ◽  
Clay Content ◽  
Northwest China ◽  
Hexi Corridor ◽  
Desert Grassland ◽  
Vegetation Biomass ◽  
Below Ground ◽  
The Mean ◽  
Arid Desert

Soil texture plays an important role in controlling vegetation production and soil organic carbon (SOC) concentration in arid desert grassland ecosystems. However, little is known about the occurrence and extent of these textural effects in the arid desert grasslands of Northwest China. This study used 160 soil profiles taken from 32 desert grassland sites in similar topographical units (alluvial–diluvial fans) in the middle of Hexi Corridor region of Northwest China to investigate vegetation biomass, SOC storage, and soil texture of seven layers in the top 100 cm of soil. The mean aboveground biomass, below-ground biomass, and total biomass in arid desert grassland were 155.3, 95.3, and 256.3 g m–2, respectively. More than 95% of the below-ground biomass was distributed in the top 30 cm of soil. Spatially, vegetation biomass was positively related to soil clay content and silt + clay content. The mean SOC density in the top 100 cm was 2.94 kg m–2 and ~46.8% of the storage was concentrated in the top 30 cm. SOC concentrations and stocks were positively and significantly related to clay content and silt + clay content in the seven soil layers sampled from the top 100 cm. The soil silt + clay content explained 42–79% of the variation in SOC stocks in the different soil depths. In conclusion, soil texture appears to be an important control on vegetation productivity and SOC capacity in arid Hexi Corridor desert grassland soils.

scholarly journals The seasonal abundance and its impact of temperatures on the development of life cycle of G. pecorum in Northwest China

2021 ◽  
Author(s):  
Ke Zhang ◽  
Heqing Huang ◽  
Ran Zhou ◽  
Boru Zhang ◽  
Chen Wang ◽  
...  
Keyword(s):  
Survival Rate ◽  
Population Distribution ◽  
Northwest China ◽  
Seasonal Abundance ◽  
Desert Steppe ◽  
Larval Population ◽  
Infection Period ◽  
Local Host ◽  
Arid Desert ◽  
Gasterophilus Pecorum

Abstract Background: The departure of the mature larvae of the horse stomach bot fly from the host indicates the beginning of a new infection period, and the Gasterophilus pecorum becomes the dominant species in the desert steppe, showing its special biological characteristics. The population dynamics of G. pecorum were studied to reveal the population development rule of G. pecorum in the arid desert steppe. Method: The larvae were collected and recorded in the newly excreted feces by tracking the Przewalski’s horses (Equus przewalskii), meanwhile, the larval pupation experiments were carried out under natural conditions. Results: (a) There was a positive correlation between the survival rate and the number of larvae (r = 0.630, p < 0.01), indicating that the species development had the characteristics of centralized occurrence; (b) The main periods of mature larvae discharge were from early April to early May (peak Ⅰ) and from mid-August to early September (peak II), and the larval population curve showed a sudden spike in increase and gradual decrease at both peaks; under higher temperature, the number of adults from peak II had higher survival rate, higher pupation rate, higher emergence rate and less eclosion time than that of peak I; (c) Although it has one generation a year, the occurrence peak twice annually displaying a bimodal population distribution phenomenon, which forms double parasitic pressure on the local host. This phenomenon is very rare in the study of insect life history, especially in the parasite epidemiology.Conclusion: The natural discharge period of the G. pecorum larvae in Kalamaili Nature Reserve (KNR) is longer than 7 months and have the potentially long term infection effect on the host. The above phenomenon is one important reason for the local equine animals to be severely infected with equine myiasis.

scholarly journals Investigation and study on the fauna and epidemiology of rodent endoparasites in the desert of northwest China

2021 ◽  
Author(s):  
Xudong Zhou ◽  
Wei Jiang
Keyword(s):  
Infection Rate ◽  
Age Distribution ◽  
Infection Intensity ◽  
Northwest China ◽  
Epidemiological Studies ◽  
Human Infection ◽  
Distribution Area ◽  
Artificial Environment ◽  
Species Cluster ◽  
Arid Desert

Abstract Zoonoses are severe and have attracted wide attention in society. Many animal parasitic diseases can cause human infection, so it is necessary to study the host of parasites and their transmission routes. The sampling investigation in the inland arid desert area of northwestern China - Xinjiang, a total of 963 rodents belonging to 21 species, 15 genera, four families, and two Lepus yarkandensis,17 Crocidura leucodon were captured in the arid desert region of Xinjiang. Among them, 33 species of endoparasite were detected, including 17 species of nematodes,15 species of tapeworm, and one acanthocephalan species. A total of 127 positive specimens were detected. The infection rate of endoparasite was 13.19%, Nematode infection rate was 6.63%, and the tapeworm infection rate was 7.98%. Epidemiological studies were carried out, and the conclusions are as follows: The infection rate of endoparasite in rodents in this area is not related to gender but is closely related to the host’s age, distribution area, host species, cluster lifestyle, and season. The infection intensity is not related to the number of infected endoparasite species and the infection rate but is mainly related to specific parasite species and rodent species. With the succession of rodent communities, the infection intensity increases from desert to artificial forest, farmland, and residential area, indicating that the direction and route of parasite transmission from primitive desert to artificial environment have formed.

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