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Species composition and productivity are influenced by water and N availability in semi-arid grasslands. To assess the effects of increased N deposition and water supply on plant species composition and productivity, two field experiments with four N addition treatments, and three N and water combination treatments were conducted in alpine grassland in the(More)
Arid areas play a significant role in the global nitrogen cycle. Dry and wet deposition of inorganic nitrogen (N) species were monitored at one urban (SDS) and one suburban (TFS) site at Urumqi in a semi-arid region of central Asia. Atmospheric concentrations of NH3, NO2, HNO3, particulate ammonium and nitrate (pNH4 (+) and pNO3 (-)) concentrations and(More)
To assess the effects of nitrogen (N) deposition on greenhouse gas (GHG) fluxes in alpine grassland of the Tianshan Mountains in central Asia, CH(4), CO(2) and N(2)O fluxes were measured from June 2010 to May 2011. Nitrogen deposition tended to significantly increase CH(4) uptake, CO(2) and N(2)O emissions at sites receiving N addition compared with those(More)
Low temperature is one of the important environmental changes that affect plant growth. The cold resistance capabilities of evergreen plants are the result of long-term adaptation to extreme environmental conditions. To investigate the responses of Ammopiptanthus nanus, a rare stress-tolerant evergreen plant, to extreme cold stress, we analyzed the proteome(More)
Ammonia, Aviation and Non-exhaust Road Traffic Emissions Yunhua Chang,†,§,∥ Xuejun Liu,*,‡ Anthony J. Dore, and Kaihui Li† †State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China ‡College of Resources and Environmental Sciences, China Agricultural University, Beijing(More)
A long-term fertilizer experiment investigating cotton-based cropping systems established in 1990 in central Asia was used to quantify the emissions of CO2, CH4 and N2O from April 2012 to April 2013 to better understand greenhouse gas (GHG) emissions and net global warming potential (GWP) in extremely arid croplands. The study involved five treatments: no(More)
In this paper, we present a practical end-to-end video transmission system with refined rate allocation at the server and adaptive playback adjustment at the client that enables High Definition (HD) video streaming via bandwidth-constraint IP network. A transmission rate is determined by a rate control algorithm which employs the Program Clock References(More)