中文摘要：

自从最后，在陆上的生态系统控制 C3/C4 相对丰富的主要因素冰川广泛地被辩论了。现在越来越多的研究人员认出那气候，而非大气的 CO2 集中，是主导的因素。为一个特定的区域，然而关于在温度和降水之间的更有影响的冲突观点仍然存在。作为在一个特定的区域的温度和降水通常不仅与对方一起在有限范围，而且 covary 以内变化，得到驾驶 C3/C4 相对丰富的机制的清楚的理解是困难的。因此，更大的空间规模上的系统的分析可以支持我们驱动力的理解。在这份报纸，自从在全球规模上冰川的最后， C3/C4 相对丰富记录被考察了，并且我们得出结论那：除了地中海气候地区， C3 植物在冰川的最后和 Holocene 期间支配了高纬度；从对 Holocene 冰川的最后， C4 相对丰富在中间的纬度增加了，但是在低纬度减少了。与现代过程的研究结合，我们建议一个简化模型自从最后，在全球生态系统解释 C3/C4 相对丰富的变化冰川。在大气的 CO2 集中的背景上自从最后冰川，温度是控制 C3/C4 相对丰富的主要因素；当温度足够高时，降水然后施加更多的影响。详细在低纬度，温度在冰川的最后和 Holocene 期间为 C4 植物的生长足够高；但是在禁止的 Holocene 增加了降水 C4 植物的生长。在中间的纬度，升起在 Holocene 的温度支持了 C4 扩大。在高纬度，温度太低，不能赞成 C4 植物的生长，自从最后，生物资源被 C3 植物支配冰川。我们的评论将从不同区域和不同时期有益于 C3/C4 相对丰富的最新获得的记录的解释，并且在更长的 timescales 上在 C3/C4 变化的开车机制的理解有它的意义(例如，自从晚中新世) 与温度和大气的 CO2 集中的可靠记录。

英文摘要：

The primary factor controlling C3/C4 relative abundance in terrestrial ecosystem since the Last Glacial has been widely debated. Now more and more researchers recognize that climate, rather than atmospheric CO2 concentration, is the dominant factor. How- ever, for a specific area, conflicting viewpoints regarding the more influential one between temperature and precipitation still exist. As temperature and precipitation in a specific area usually not only vary within limited ranges, but also covary with each other, it is difficult to get a clear understanding of the mechanism driving C3/C4 relative abundance. Therefore, systematic analysis on greater spatial scales may promote our understanding of the driving force. In this paper, records of C3/C4 relative abundance since the Last Glacial on a global scale have been reviewed, and we conclude that： except the Mediterranean climate zone, C3 plants predominated the high latitudes during both the Last Glacial and the Holocene; from the Last Glacial to the Holocene, C4 relative abundances increased in the middle latitudes, but decreased in the low latitudes. Combining with studies of modem process, we propose a simplified model to explain the variations of C3/C4 relative abundance in global ecosystem since the Last Glacial. On the background of atmospheric CO2 concentration since the Last Glacial, temperature is the primary factor controlling C3/C4 rela- tive abundance; when temperature is high enough, precipitation then exerts more influence. In detail, in low latitudes, temperature was high enough for the growth of Ca plants during both the Last Glacial and the Holocene; but increased precipitation in the Holocene inhibited the growth of Ca plants. In middle latitudes, rising temperature in the Holocene promoted the Ca expansion. In high latitudes, temperature was too low to favor the growth of C4 plants and the biomass was predominated by C3 plants since the Last Glacial. Our review would benefit interpretation of newly gained records of C3/C4 relative abundance