oalib
Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Status of Asiatic Wild Cat and its habitat in Xinjiang Tarim Basin, China  [PDF]
Ablimit Abdukadir, Babar Khan
Open Journal of Ecology (OJE) , 2013, DOI: 10.4236/oje.2013.38063
Abstract:

The Asiatic Wild CatFelis silvestris ornataisregarded as “Least concerned” (LC) first, as “Vulnerable” (VU) and following “Endangered” (EN) and then “Critically endangered” (CR) species as finally and originally concentrative distribute in Xinjiang Tarim Basin region in northwest China. This paper provides comprehensive information on bio-morphology, habitat selectivity, environmental condition, habit, preyfeed source and every item of composition, and relationship among Wild Cat and domestic cat at presence investigated in 2004-2006 and 2011- 2013 as especial study. The paper also illustrated some dynamical statistics of wild cat’ pelt collection by national trade from three prefectures in the last 40 years. Briefing the results of indication that large scale and continuous openup land for cotton in unplanned, exploit petroleum and natural gas, misapply water and destroy desert vegetation, poaching and killing prey objectives, etc., of them long-term effects on plants functional density and qualities of the cat surviving habitat and productivity, whereas pressures of increasing human population to fragile desert ecosystem showed efficiency and desirable effects of the cat surviving.

 

Oligocarpia kepingensis sp. nov. from the Lower Permian of the northern Tarim Basin, Xinjiang and itsin situ spores
Yongdong Wang,Xiuyuan Wu
Chinese Science Bulletin , 1999, DOI: 10.1007/BF02884728
Abstract: A Palaeozoic gleicheniaceous fernOligocarpia kepingensis sp. nov. is described from the Lower Permian of the northern Tarim Basin, Xinjiang, China. The material comprises fertile organs including sori, sporangia, spores and associated sterile leaf of theSphenopteris type. The sori are circular and 0.6–0.8 mm in diameter, and each sorus consists of 4–6 oval sporangia without an indusium. A transverse annulus completely encircles the sporangium. Each sporangium produces probably 256 trilete spores resembling the dispersed genusLeiotriletes. Comparisons are made betweenO. kepingensis and other species ofOligocarpia in the soral organization and spores. It is reasonable to includeOligocarpia in Gleicheniaceae based on its similarities of fertile character to the extant gleicheniaceous members.
Oligocarpia kepingensis sp. nov. from the Lower Permian of the northern Tarim Basin, Xinjiang and its in situ spores

Yongdong Wang,Xiuyuan Wu,

科学通报(英文版) , 1999,
Abstract: A Palaeozoic gleicheniaceous fernOligocarpia kepingensis sp. nov. is described from the Lower Permian of the northern Tarim Basin, Xinjiang, China. The material comprises fertile organs including sori, sporangia, spores and associated sterile leaf of theSphenopteris type. The sori are circular and 0.6–0.8 mm in diameter, and each sorus consists of 4–6 oval sporangia without an indusium. A transverse annulus completely encircles the sporangium. Each sporangium produces probably 256 trilete spores resembling the dispersed genusLeiotriletes. Comparisons are made betweenO. kepingensis and other species ofOligocarpia in the soral organization and spores. It is reasonable to includeOligocarpia in Gleicheniaceae based on its similarities of fertile character to the extant gleicheniaceous members.
Evidence that a West-East admixed population lived in the Tarim Basin as early as the early Bronze Age
Chunxiang Li, Hongjie Li, Yinqiu Cui, Chengzhi Xie, Dawei Cai, Wenying Li, Victor H Mair, Zhi Xu, Quanchao Zhang, Idelisi Abuduresule, Li Jin, Hong Zhu, Hui Zhou
BMC Biology , 2010, DOI: 10.1186/1741-7007-8-15
Abstract: Mitochondrial DNA analysis showed that the Xiaohe people carried both the East Eurasian haplogroup (C) and the West Eurasian haplogroups (H and K), whereas Y chromosomal DNA analysis revealed only the West Eurasian haplogroup R1a1a in the male individuals.Our results demonstrated that the Xiaohe people were an admixture from populations originating from both the West and the East, implying that the Tarim Basin had been occupied by an admixed population since the early Bronze Age. To our knowledge, this is the earliest genetic evidence of an admixed population settled in the Tarim Basin.The Tarim Basin in western China, positioned at a critical site on the ancient Silk Road, has played a significant role in the history of human migration, cultural developments and communications between the East and the West. It became famous due to the discovery of many well-preserved mummies within the area. These mummies, especially the prehistoric Bronze Age 'Caucasoid' mummies, such as the 'Beauty of Loulan', have attracted extensive interest among scientists regarding who were these people and where did they come from.Based on analyses of human remains and other archaeological materials from the ancient cemeteries (dated from approximately the Bronze Age to the Iron Age), there is now widespread acceptance that the first residents of the Tarim Basin came from the West. This was followed, in stages, by the arrival of Eastern people following the Han Dynasty [1,2]. However, the exact time when the admixture of the East and the West occurred in this area is still obscure [3]. In 2000, the Xinjiang Archaeological Institute rediscovered a very important Bronze Age site, the Xiaohe cemetery, by utilizing a device employing the global positioning system. The rediscovery of this cemetery provided an invaluable opportunity to further investigate the migrations of ancient populations in the region.The Xiaohe cemetery (40°20'11"N, 88°40'20.3"E) is located in the Taklamakan Desert of north
Evapotranspiration of Cotton, Apocynum pictum, and Zyzyphus jujuba in the Tarim Basin, Xinjiang, China  [PDF]
Niels Thevs, Ahemaitijiang Rouzi
Journal of Water Resource and Protection (JWARP) , 2015, DOI: 10.4236/jwarp.2015.713081
Abstract: Evapotranspiration is a crucial component of the water balance of ecosystems and landscapes, especially under arid climates. In the Tarim Basin, China, there is an increasing competition for water between irrigated agriculture, mainly cotton, and natural ecosystems, which results in periods of water shortage. Such water shortages also impact on cotton. Therefore, alternative crops have been searched for, which eventually withstand such periodical water shortages better than irrigated cotton, notably Zyzyphus jujuba and Apocynum pictum. The fruit tree Z. jujuba has been promoted from the previous decade onward in parts of the Tarim Basin. A. pictum is used as medicinal plant and in a small scale as fiber crop. A. pictum is a perennial herb, which is part of the natural riparian vegetation along the rivers of the Tarim Basin and which grows without irrigation. Therefore, the objective of this paper is to investigate the crop evapotranspiration (ETc) of those three plant species over the growing season. In this paper, the Penman-Monteith approach was employed. Daily means of stomatal resistance in June was 118 s/m, 222 s/m, and 927 s/m for cotton, A. pictum leafs, and Z. jujuba, respectively. In October, those daily mean stomatal resistance climbed to 885 s/m and 742 s/m for cotton and A. pictum leafs, respectively. ETc over the growing season was 514.7 mm for cotton, 217.2 mm for A. pictum, and 339 mm for Z. jujuba. The Kc value of Z. jujuba was in the range of other fruit trees. In this study cotton attained high yields compared to world average yields at a low ETc. This high water use efficiency was achieved through a shift from flood to drip irrigation, the utilization of plastic mulch, and breeding of cotton varieties.
Study of Water Resources Carrying Capacity in Tarim River Basin of Xinjiang
新疆塔里木河流域水资源承载力评价研究

MENG Li-hong,CHEN Ya-ning,LI Wei-hong,
孟丽红
,陈亚宁,李卫红

中国沙漠 , 2008,
Abstract: This paper primarily explores the method of comprehensive evaluation of water resources carrying capacity of inland river basin in arid northwest China, and sets up an evaluation model by applying the fuzzy comprehensive evaluation method to Tarim river basin. Based on the data of nature, society, economics and water resources of Tarim River in 2002. This paper evaluated the water resources carrying capacity by means of the model. The selected evaluation factors include irrigation ratio of arable land, use efficiency of water resources, water supply modulus, water demand modulus , per capita practical water supply and ecological water use ratio. The evaluated results show that the comprehensive grade of Tarim river basin is 0. 492, and the current water exploitation and use has reached a relative high degree, and there is only a very limited water carrying capacity. It is necessary to strengthen water resources integrated management in order to utilize water resources scientifically and reasonably.
A Study of the Cretaceous-Tertiary Sequence Stratigraphy of Tarim Basin, Xinjiang
新疆塔里木盆地白垩纪—第三纪层序地层学研究

DING Xiao-zhong,GUO Xian-pu,PENG Yang,JI Yun-long,LI Xi-chen,ZHANG Tao,LIU Li-jun,WANG Yi-nong,
丁孝忠
,郭宪璞,彭阳,纪云龙,李喜臣,张韬,刘丽军,王易农

地球学报 , 2002,
Abstract: According to the comprehensive analyses of the depositional sequence of the Cretaceous Tertiary outcrop sections in Tarim basin, combined with the seismic sequence and drilling information, the authors hold that the Cretaceous Tertiary strata can be divi ded into 30 depositional sequences in the southwestern depression and 24 depositional sequences in the northwestern depression. This suggests that, due to their different tectonic settings and sedimentary environments, the 3rd order sequences in these two depressions cannot be correlated directly one by one. Ordered stacking of several 3rd order sequences forms 2nd order supersequence and the system tracts of the supersequences. The ordered stacking has three types, namely progradation association, retrogradation association and aggradation association. Each supersequence is formed by different types of 3rd order sequence group. On the basis of the study of 2nd order sequences, the Cretaceous Tertiary strata may be subdivided into 4 supersequences, which can be correlated synchronously in Tarim basin, and the cycles of relative sea level reflected by them are basically the same. The Cretaceous Tertiary strata in south Tibet were also influenced by seawater of the Tethys. The depositional sequences and sea level changes in Tarim basin are consistent with those in south Tibet. This proves that these two areas are both influenced by Tethyan tectonic movement and eustatic change. The rapid uplifting of the Qinghai Tibet plateau and the relative subsidence of the Tarim basin since Miocene have resulted in the difference between these two areas in sequence types and rates of sea level change.
MIOCENE FORAMINIFERA OF TARIM BASIN, XINJIANG AND THEIR GEOLOGICAL SIGNIFICANCE
新疆塔里木盆地中新世有孔虫及其地质意义

HAO Yi-chun,ZENG Xue-lu,QIU Song-yu,HE Xi-xian,
郝诒纯
,曾学鲁,裘松余,何希贤

地球学报 , 1982,
Abstract: The miocene beds in Tarim Basin are characterized by variegated clasticdeposits comprising mainly sandstone, siltstone, arenaceous mudstone and mu-dstone with intercalations of gypsum and occasionally of conglomeratic beds.The whole sequence is predominated by dark brownish, brownish, reddish andyellowish strata intercalated with subordinate dark grey, grey and greyishgreen beds. Gypsum deposits are better developed in the middle and lowerparts.
Water Scarcity and Allocation in the Tarim Basin: Decision Structures and Adaptations on the Local Level
Niels Thevs
Journal of Current Chinese Affairs , 2011,
Abstract: The Tarim River is the major water source for all kinds of human activities and for the natural ecosystems in the Tarim Basin, Xinjiang, China. The major water consumer is irrigation agriculture, mainly cotton. As the area under irrigation has been increasing ever since the 1950s, the lower and middle reaches of the Tarim are suffering from a water shortage. Within the framework of the Water Law and two World Bank projects, the Tarim River Basin Water Resource Commission was founded in 1997 in order to foster integrated water resource management along the Tarim River. Water quotas were fixed for the water utilization along the upstream and downstream river stretches. Furthermore, along each river stretch, quotas were set for water withdrawal by agriculture and industry and the amount of water to remain for the natural ecosystems (environmental flow). Furthermore, huge investments were undertaken in order to increase irrigation effectiveness and restore the lower reaches of the Tarim River. Still, a regular water supply for water consumers along the Tarim River cannot be ensured. This paper thus introduces the hydrology of the Tarim River and its impacts on land use and natural ecosystems along its banks. The water administration in the Tarim Basin and the water allocation plan are elaborated upon, and the current water supply situation is discussed. Finally, the adaptations made due to issues of water allocation and water scarcity on the farm level are investigated and discussed.
THE SOIL HABITAT TYPES OF POACYNUM HENDERSONII COMMUNITIES IN THE TARIM BASIN OF XINJIANG
塔里木盆地大叶白麻的土壤生境类型

Fang Xue-liang,
方学良
,廖代富

植物生态学报 , 1986,
Abstract: Based on the suitabilities of Poacynum hendersonii to the soils, which were formed by the combined effect of different topographic positions, soil salinity, the depth of groundwater level and other ecological factors, the present authors differentiate the soils in the Tarim Basin with stands of P. hendersonii communities into five soil habitat types: meadow soil in flood land, saline soil with high groundwater level, saline soil with middle groundwater level, saline soil with low groundwater level, and desertification desert forest soil in the light of plant appearance, plant growth, chemical composition and other characteristics of the P. hendersonii grown on such soils, and suggest that we should use and protect properly this natural plant resource depending on the different soil habitat types.
Page 1 /100
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.