LIU Fang-yan
Desert Ecosystem Station in Yuanmou County, State Forestry Administration of China, Research Institute of Resources Insects, Chines Academy of Forestry, China;College of Biological Sciences and Biotechnology, Beijing Forestry University, ChinaZHANG Zhi-xiang
College of Biological Sciences and Biotechnology, Beijing Forestry University, ChinaWANG Xiao-qin
Desert Ecosystem Station in Yuanmou County, State Forestry Administration of China, Research Institute of Resources Insects, Chines Academy of Forestry, ChinaLI Kun
Desert Ecosystem Station in Yuanmou County, State Forestry Administration of China, Research Institute of Resources Insects, Chines Academy of Forestry, ChinaCHEN Mei
Stateowned Forest Farm of Shizhu County, Chongqing City, ChinaDENG Xiao-jing
Forestry Work Station of Shanmenxia City, Henan Province, ChinaThe seed dispersal pattern, spatial distribution characteristics and seed bank dynamics of Terminalia franchetii in Dry-hot Valley of Jinsha River were investigate by random sampling and follow-up survey. The seed dispersal pattern had obvious direction influenced by strong wind, and the dispersal distance was more than 1.6 times of tree height. There was significant difference in soil seed bank among the different community types, but the change trends were consistent during different time. The soil seed bank was relatively small in rainy season (June, August, and October), and it was gradually increased from December to April of next year. The canopy seed bank started to shed in October, and reached to peak in March of next year (more than 15% of seeds shedding), and then the seed shedding rate became slow again, and seed shedding rate was the lowest in June and July of next year. However, there were nearly 15% of seeds existed in the canopy until October of next year. In summary, the lack of seed sources should not be the reason of T. franchetii seedling regeneration failure, and it might be associated with other factors which influence the community natural regeneration, such as the quality of seeds and community environment. Simultaneously, T. franchetii soil seed bank was closely related to the shedding process of canopy seed bank. Canopy seeds shedding might be closely related to the climatic factors, and might be a positive correlation with wind power, and be a negative correlation with rainfall and relative humidity. This might be an adaptive characteristic to Dry-hot valley environment in a long time.
刘方炎,张志翔,王小庆,李昆,陈梅,邓小京.金沙江干热河谷滇榄仁种子扩散与种子库特征研究[J].热带亚热带植物学报,2012,20(4):333~340
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