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Factors acting on the distribution region of carlemanniaceae:Rainfall,temperatureand the plants' biological characteristics

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Science Bulletin 2007年第S2期 244-250页

作者： YANG Xue~(1,2) LU ShuGang~1 ZHANG YiPing~3 PENG Hua~(2+) HOU SiMing~1 1 Institute of Ecology and Geobotany,Yunnan University,Kunming 650091,China 2 Key Laboratory of Biodiversity and Biogeography,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650204,China 3 Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla 666303,China

The family carlemanniacese in East Asia and tropical Asia,comprising two genera,carlemannia and Silvianthus,are mainly distributed along the southern foot of the Himalaya Mountains and the western and southern interface of the Yunnan *** main reproductive process for carlemannia tetra- gona was verified as self-pollination by the pollination experiments in this *** rates for seeds of both *** and Silvianthus bracteatus could reach 100% when the seeds were col- lected after two months,while the rates decreased to 25% when collection took place in the previous *** was found that the seed had no dormancy stages,and their seed banks were of the Transient Soil *** field observations,the dehiscence status for fruits showed that their seeds could not be ejected effectively by capsules for *** analyzing the temperature and rainfall data from the years 1971 to 2000,it was shown that annual rainfall,the lowest mean monthly temperature in a year, and the extreme lowest temperature In a month had s great effect on the distribution range of Carle- manniaceae,while the mean annual temperature had s lesser *** narrow distribution range of carlemanniaceae was affected by multiple factors,such as the short pollen dispersal distance and the Transient Soil Seed *** population sizes of Carlemannlaceae were also easily affected by the level of rainfall,not by any single variable.

关键词： carlemannia Silvianthus distribution region seed dispersal rainfall temperature

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