Spatiotemporal patterns of seed dispersal in Populus euphratica Estimation of Solar Energy Use Efficiency and Spatiotemporal Pattern in Guangdong Based on Multitemporal NOAA-AVHRR NDVI and GIS Methods Spatiotemporal pattern of carbon sources and sinks in Yangtze River Delta region, China. Spatiotemporal analysis of water supply service in the Dongjiang Lake Basin The spatiotemporal changes of vegetation cover in Beijing-Tianjin sandstorm source control region during 2000-2012