Advance in researches on cyanobacterium allelopathic inhibition Ecological mechanisms and prospects for utilization of toxins from parasitic hymenopteran Landscape ecological mechanism on system coupling of the meta-ecosystem consisted of mountain,desert and oasis in Hexi corridor,Gansu,China Comparison of Microecological Characterization in Rhizosphere Soil between Healthy and Un-healthy Plants in Continuous Cropping Potato Fields Succession pattern of artificial vegetation community and its ecological mechanism in an arid desert region A preliminary theoretical framework of microbial ecology