Stable carbon isotope ratios (δ¹³C) of soil record information regarding C₃ and C₄ plants at the landscape scale that can be used to document vegetation distribution patterns. The Central Brazilian savanna (locally called the Cerrado) has a substantial potential to develop studies of patterns of dynamics and distribution of soil δ¹³C, due to its environmental diversity. The purpose of this work was to develop a spatial model of soil δ¹³C (soil δ¹³C isoscape) to the Cerrado, based on multiple linear regression analysis, and compare the results with the existing model to obtain greater detail of the soil δ¹³C distribution. The model used 219 soil samples (0–20 cm depth) and a set of climatic, pedological, topographic, and vegetation correlations. The soil δ¹³C isoscape model presented amplitude between −29‰ and −13‰, with the highest estimated values in the southern and the lowest values in the northern of the Cerrado. Results indicate that soil δ¹³C, by reflecting the relative contribution of C₃ and C₄ species to plant community productivity, served as a proxy indicator of the vegetation history at the landscape scale for the Central Brazilian savanna. Despite the large sampling effort, there are still regions with some gaps that the model could not estimate. However, the soil δ¹³C isoscape model filled most the existing gaps and provided greater detail of some unique local aspects of the Cerrado.

土壤的稳定碳同位素比 ( δ ¹³ C) 记录了景观尺度上有关 C ₃和 C ₄植物的信息，可用于记录植被分布模式。由于其环境多样性，巴西中部稀树草原（当地称为塞拉多）具有开展土壤δ ¹³ C动态和分布模式研究的巨大潜力。这项工作的目的是基于多元线性回归分析开发一个土壤δ ¹³ C（土壤δ ¹³ C 等值线图）到塞拉多的空间模型，并将结果与​​现有模型进行比较以获得土壤δ 的更多细节¹³C 分布。该模型使用了 219 个土壤样本（0-20 厘米深度）和一组气候、土壤学、地形和植被相关性。土壤δ ¹³ C等景模型的振幅在-29‰和-13‰之间，估计值在南部最高，在塞拉多北部最低。结果表明，土壤δ ¹³ C 通过反映 C ₃和 C ₄物种对植物群落生产力的相对贡献，作为巴西中部稀树草原景观尺度上植被历史的代理指标。尽管进行了大量抽样工作，但仍有一些区域存在模型无法估计的差距。然而，土壤δ ¹³C isoscape 模型填补了大部分现有的空白，并提供了塞拉多一些独特的局部方面的更多细节。