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Zhu S.-C.,Hunan University of Technology | Zhu S.-C.,Meteorological Institute of Qinghai Province | Tang J.-X.,Hunan University of Technology | Zeng X.-X.,Hunan University of Technology | And 4 more authors.
Journal of Central South University | Year: 2015

Fungi Z4 and Z8, isolated from the heavy metal polluted soil, have strong resistance to Cd and Pb. The strains were identified on the base of their morphology and internal transcribed spacers (ITS) region. Pot experiments were conducted to study the effect of two strains (Z4 and Z8) on the growth and accumulation of Cd and Pb of Guizhou oilseed rape. The results show that strains Z4 and Z8 belong to Mucor circinelloides and Mucor racemosus, respectively. The heights of Guizhou oilseed rape inoculated with strain Z8 increase by 47.90% than the control. The highest fresh mass is found in the plant with Z4/Z8, which is enhanced by 160.81%. Pot experiments show that Z4/Z8 inoculums can accelerate accumulation of heavy metals in the plant. The contents of Cd and Pb are increased by 117.60% and 63.48%, respectively. Meanwhile, the heavy metal concentrations in potting soil with the two strains are found to be lower than those of the control, and the concentrations of Cd and Pb are decreased by 60.57% and 27.12%, respectively. © 2015, Central South University Press and Springer-Verlag Berlin Heidelberg. Source

Qu J.,CAS Northwest Institute of Plateau Biology | Yang M.,CAS Northwest Institute of Plateau Biology | Li W.,CAS Northwest Institute of Plateau Biology | Chen Q.,CAS Northwest Institute of Plateau Biology | And 5 more authors.
Journal of Arid Environments | Year: 2016

Exploring animals’ responses to climate change will improve our understanding of the ecological consequences of such a phenomenon. As the “third pole” of the earth, the Tibetan Plateau is sensitive to climate change. To explore the effects of climate change on the reproduction of small mammals in an arid environment, we tested the reproduction of a native species, plateau pika (Ochotona curzoniae), from 2005 to 2009 in Dawu, which is located east of the Tibetan Plateau. The breeding season of this population maintained a stable onset date, but the length of breeding season varied from 53 to 84 days. The April temperature and spring precipitation positively affected the length of the breeding season. The offspring sex ratio was female biased except in 2009, whereas the ratio of recruits per reproductive female (RRF) ranged from 2.7 to 4.4. The April temperature and the normalized difference vegetation index (NDVI) in June positively affected the offspring sex ratio, whereas the precipitation in cold seasons and May NDVI positively affected the RRF. Therefore, increased temperature, precipitation, and NDVI may extend the length of the breeding season, increase the sex ratio, and produce more offspring recruits. © 2016 Elsevier Ltd Source

Li J.,Changan University | Guo J.,Changan University | Xu W.,Meteorological Institute of Qinghai Province
ISWREP 2011 - Proceedings of 2011 International Symposium on Water Resource and Environmental Protection | Year: 2011

Variations in vegetation cover and its response to global warming are important to understand the interaction between Ecology system and Climate system. Using temperature dataset from Climatic Research Unit (CRU) TS3.0 and the Normalized Difference Vegetation Index (NDVI) from NOAA/AVHRR, the trends of annual mean temperature and annual mean NDVI over Shaanxi province of China were investigated during the period from 1982 to 2006. The results show that the increasing trends of temperature and NDVI were both evident. The correlation coefficient between temperature and NDVI was 0.534 (P<0.01), suggesting that the increase/decrease in NDVI is well associated with the increase/decrease in temperature. Furthermore, the prolonged growing period, through which the rising temperature facilitates the vegetation activities, was also positively correlated with NDVI. © 2011 IEEE. Source

Liu X.,Meteorological Observatory of Qinghai Province | Jin S.,Lanzhou University | Wang L.,Meteorological Institute of Qinghai Province
Advanced Materials Research | Year: 2013

The WRF model is employed to simulate the low-level wind field of a wind farm that located in the arid regions in northwest of China for February and October 2008. We presented some difficult issues using mosescale numerical model in low-level wind predicting, meanwhile, corresponding solutions are proposed. Some conclusions and achievements in wind forecasting are summarized; the planning and prospects of next phase also are illustrated. © (2013) Trans Tech Publications, Switzerland. Source

Xu W.,CAS Northwest Institute of Plateau Biology | Xu W.,Meteorological Institute of Qinghai Province | Xu W.,University of Chinese Academy of Sciences | Gu S.,CAS Northwest Institute of Plateau Biology | And 7 more authors.
International Journal of Applied Earth Observation and Geoinformation | Year: 2011

Using satellite-observed Normalized Difference Vegetation Index (NDVI) data and Rotated Empirical Orthogonal Function (REOF) method, we analyzed the spatio-temporal variation of vegetation during growing seasons from May to September in the Three-River Source Region, alpine meadow in the Qinghai-Tibetan Plateau from 1982 to 2006. We found that NDVI in the centre and east of the region, where the vegetation cover is low, showed a consistent but slight increase before 2003 and remarkable increase in 2004 and 2005. Impact factors analysis indicted that among air temperature, precipitation, humid index, soil surface temperature, and soil temperature at 10 cm and 20 cm depth, annual variation of NDVI was highly positive correlated with the soil surface temperature of the period from March to July. Further analysis revealed that the correlation between the vegetation and temperature was insignificant before 1995, but statistically significant from 1995. The study indicates that temperature is the major controlling factor of vegetation change in the Three-River Source Region, and the currently increase of temperature may increase vegetation coverage and/or density in the area. In addition, ecological restoration project started from 2005 in Three-River Source Region has a certain role in promoting the recovery of vegetation. © 2011 Elsevier B.V. Source

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