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Dust pollen distribution on a continental scale and its relation to present-day vegetation along north-south transects in east China

查看全文 作  者:P. [1]COUR;D. [2]DUZER;G. [2]ROBERT;M. [1]CALLEJA;C. [3]BEAUDOUIN 高影响力作者 机构地区:[1]Ecole Nationale Supérieure Agronomique de Montpellier, 34000 Montpellier, France;[2]UMR CNRS 5554 ISEM, Université Montpellier 2, 34000 Montpellier, France;[3]Department of Earth Sciences, Sun Yat-sen University高影响力机构 出  处:《Science China Earth Sciences》索引2007年第50卷第2期,共11页高影响力期刊 基  金:Supported by the National Natural Science Foundation of China (Grant No. 40331011) 摘  要:A series of dust pollen samples was collected along N-S transects in east China (18°N to 53°N latitudes). Sample sites extend from the cold-temperate zone in the north to the tropical region in the south. Pollen taxa characterize each region and reflect the natural and devastated vegetation as well as corre- sponding climatic zones. The quantitative pollen data can be used to estimate the spatial distribution of planted and introduced species. Valuable information of human disturbance of the natural forest is evaluated by quantitative comparison between dust pollen and in-situ pollen of protected forest. In addition, percentages of grass pollen vary regularly from north to south that is consistent with spatial distribution of net primary productivity in east China. Among all grasses, Artemisia and the Gramineae carry the clearest signal: their ratio increases northwards and therefore represent a suitable and con- venient tool for palaeoclimate reconstructions. 关 键 词:DUST POLLEN VEGETATION east China human impact climate ZONES
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