A revision of Elaeagnus L. (Elaeagnaceae) in mainland China Distribution and community characteristics of threatened seagrass Halophila beccarii in Dongzhai Harbor, Hainan Pollen morphology of three species of Elaeagnus in Xinjiang and its taxonomic significance The absorption and identification of volatiles from pine needles of Pinus massoniana Lamb.damaged by Dendrolimus punctatus(Walker) and the antennal responses of female Blepharipa zebina(Walker) to these volatile compounds Ecological footprint analysis of a semi-arid grassland region facilitates assessment of its ecological carrying capacity: a case study of Xilinguole League