Spatiotemporal dynamics of seed rain in natural forest of Betula alnoides in Jingxi County, Guangxi, China Temporal and spatial dynamic changes and landscape pattern response of Hemeroby in Dayang estuary of Liaoning Province, China Spatiotemporal variation of grassland vegetation NDVI in the middle and upper reaches of the Hei River and its response to climatic factors Carbon fixation estimation for the main plantation forest species in the red soil hilly region of southern-central Jiangxi Province, China Spatiotemporal dynamics of seed rain in a broadleaved-Korean pine mixed forest in Xiaoxing′an Mountains, China