Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China.
Sci Rep. 2018 Feb 12;8(1):2806. doi: 10.1038/s41598-018-20764-9.
It is important to accurately estimate terrestrial ecosystem carbon (C) storage. However, the spatial patterns of C storage and the driving factors remain unclear, owing to lack of data. Here, we collected data from literature published between 2004 and 2014 on C storage in China's terrestrial ecosystems, to explore variation in C storage across different ecosystems and evaluate factors that influence them. We estimated that total C storage was 99.15 ± 8.71 PgC, with 14.60 ± 3.24 PgC in vegetation C (Veg-C) and 84.55 ± 8.09 PgC in soil organic C (SOC) storage. Furthermore, C storage in forest, grassland, wetland, shrub, and cropland ecosystems (excluding vegetation) was 34.08 ± 5.43, 25.69 ± 4.71, 3.62 ± 0.80, 7.42 ± 1.92, and 15.17 ± 2.20 PgC, respectively. In addition to soil nutrients and texture, climate was the main factor regulating the spatial patterns of C storage. Climate influenced the spatial patterns of Veg-C and SOC density via different approaches, Veg-C was mainly positively influenced by mean annual precipitation (MAP), whereas SOC was negatively dependent on mean annual temperature (MAT). This systematic estimate of C storage in China provides new insights about how climate constrains C sequestration, demonstrating the contrasting effects of MAP and MAT on Veg-C and SOC; thus, these parameters should be incorporated into future land management and C sequestration strategies.
准确估算陆地生态系统碳（C）储量非常重要。然而，由于数据缺乏，C 储量的空间格局和驱动因素仍不清楚。在这里，我们收集了 2004 年至 2014 年间发表的关于中国陆地生态系统 C 储量的文献数据，以探讨不同生态系统中 C 储量的变化，并评估影响 C 储量的因素。我们估计总 C 储量为 991.5 ± 87.1 PgC，其中植被 C（Veg-C）为 146.0 ± 32.4 PgC，土壤有机 C（SOC）为 845.5 ± 80.9 PgC。此外，森林、草地、湿地、灌木和农田（不包括植被）生态系统的 C 储量分别为 340.8 ± 54.3、256.9 ± 47.1、36.2 ± 08.0、74.2 ± 19.2 和 151.7 ± 22.2 PgC。除土壤养分和质地外，气候是调节 C 储量空间格局的主要因素。气候通过不同的途径影响 Veg-C 和 SOC 密度的空间格局，Veg-C 主要受年平均降水量（MAP）的正影响，而 SOC 则负依赖于年平均温度（MAT）。本研究系统地估算了中国的 C 储量，为气候如何制约碳封存提供了新的认识，表明 MAP 和 MAT 对 Veg-C 和 SOC 的影响具有对比性；因此，这些参数应纳入未来的土地管理和碳封存策略中。
