Comparison of climatic threshold of geographical distribution between dominant plants and surface pollen in China  

作　　者：CHEDDADI Rachid BEAUDOUIN Celia 

机构地区：[1]Institut des Sciences de l'Evolution Universite Montpellier II,Montpellier 34095,France [2]Department of Earth Sciences,Sun Yat-sen University,Guangzhou 510275,China

出　　处：《Science China Earth Sciences》2008年第8期1107-1120,共14页中国科学（地球科学英文版）

基　　金：the National Natural Science Foundation of China (Grant Nos.40331011,40772113 and 40325002)

摘　　要：The geographical distribution of dominant plant species in China was georeferenced and climatic variables were interpolated into all grids.Accordingly,the percentage distributions of principal pollen taxa based on 1860 surface pollen sites in China were selected and the related climate values were interpolated with the same method. The geographical and climatic comparison between the two data-sets indicated that the climate threshold of most pollen taxa from surface pollen is coherent with plant distributions. The climatic envelopes of dominant plant are mostly accordant with those of pollen taxa at certain levels. However, some distinct offsets of the climate ranges exist between the two datasets for most pollen taxa identified at family level, such as Ericaceae,Asteraceae, Poaceae and Chenopodiaceae. The present study provides for the first time rich information on temperature and precipitation in relation to pollen and plant distribution based on the datasets on a continental scale useful for global ecological modeling and Quaternary palaeoclimate reconstruction.The geographical distribution of dominant plant species in China was georeferenced and climatic variables were interpolated into all grids. Accordingly, the percentage distributions of principal pollen taxa based on 1860 surface pollen sites in China were selected and the related climate values were interpolated with the same method. The geographical and climatic comparison between the two datasets indicated that the climate threshold of most pollen taxa from surface pollen is coherent with plant distributions. The climatic envelopes of dominant plant are mostly accordant with those of pollen taxa at certain levels. However, some distinct offsets of the climate ranges exist between the two datasets for most pollen taxa identified at family level, such as Ericaceae, Asteraceae, Poaceae and Chenopodiaceae. The present study provides for the first time rich information on temperature and precipitation in relation to pollen and plant distribution based on the datasets on a continental scale useful for global ecological modeling and Quaternary palaeoclimate reconstruction.

关 键 词：surface POLLEN DOMINANT plant species GEOGRAPHICAL distribution CLIMATE global changes 

分 类 号：Q948[生物学—植物学]