关键词: 气候变暖, 粮食安全, 温室气体, 生产力, 超级稻, 长江三角洲

Abstract: By the methods of field investigation and laboratory analysis, the hab itat characteristics of Chinese giant salamander （Andrias davidianus） in Zhangjiaj ie Giant Saramander National Nature Reserve were studied from July to August in 2006〖KG-*2〗- 〖KG-*7〗2008. In the study area, the inhabited reaches of A. davidianus were ch aracterized by moderate altitude (373±97 m), relatively small river width (63 9±213 m) and depth (107±053 m), lithoid substrate with more gravels or r ocks, irregular river bed, stony river bank with more scrub vegetation and larger cov erage (>50%), steeper bank gradient (58°±17°), higher water flow rate (033±0 08 m·s-1), and weaker anthropogenic disturbances. There were many burro ws (4±2 ind·100 m-1) in the habitat, and the water flow rate in the bur rows were relatively low (022±010 m·s-1). The waters in the habitat were with high DO (723±085 mg·L-1), low COD (400±251 mg·L- 1), low TN (011±015 mg·L-1), moderate total hardness (13716±67 69 mg·L-1), and lesser coliform groups (3419±3407 ind·L-1) . Crabs were the most important food organisms affecting the A. davidianus population in the study area, followed by shrimps.

Key words: climate warming, food security, greenhouse gas, productivity, super-rice, Yangtze Delta