Overview on the 6th international symposium on modern ecology series of 2011 Comparisons of relationships between leaf and fine root traits in hilly area of the Loess Plateau, Yanhe River basin, Shaanxi Province, China Comparative of feeding behaviors of Sitobion avenae, Sitobion graminum and Rhopalosiphum padi (Homoptera: Aphididae) using electrical penetration graph (EPG) The adaptive strategies of halophyte seed germination Technological principles and strategies for development of resourcesaving eco-agriculture in the transitional zone of mountain and plain--A case study from Xilingdi Experimental Area in the hilly districts of Mt. Taihang POLLINATION ECOLOGY OF GENTIANA LAWRENCEI VAR. FARRERI, A LATE-FLOWERING QINGHAI-TIBET PLATEAU SPECIES Water use strategies of Malus toringoides and its accompanying plant species Berberis aemulans Spatial structures of soilcarbon and nitrogen of China fir and Masson pine mixed forest in the Three Gorger Reservoir Areas Morphological and Physiological Responses of Acer mono and Quercus liaotungensis Seedlings to a Forest Light Gradient Characterization of Contemporary Forest Pathology Study on the Orchid Diversity and Protective Strategies of Jinfo Mountain Nature Reserve in Chongqing Plant Conservation in the Future: New Challenges, New Opportunities