Soil biogenic volatile organic compounds (sBVOCs) contribute to ecosystem emissions and play an important role in the soil ecosystem. Most previous studies on sBVOCs have looked at emissions from excavated soil in the laboratory or in situ emissions from areas with bare soil, using chambers. So far, however, the actual BVOC concentrations in the soil have rarely been considered. Herein, we sought to explore the relationships between the vegetation cover in a low Arctic heath ecosystem in Western Greenland and the BVOC concentration in the soil below. In situ measurements were performed at 15‐cm depth in areas dominated by Cassiope tetragona , Empetrum nigrum , Salix glauca , and Betula nana and along a 36‐m‐long transect with mixed vegetation cover during the growing seasons of 2015–2017. sBVOC concentrations varied between the different vegetation covers, with higher concentrations below Cassiope and Betula compared to Empetrum . Furthermore, sBVOC concentrations differed along the transect, and this variation was also partly related to differences in the vegetation cover. Moreover, we demonstrate that installation of a soil probe, for sampling soil air, changes the composition and magnitude of sBVOCs up to 1 day after the installation.

中文翻译：

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北极土壤中的生物挥发性有机化合物：植被覆盖度和变异性的田间研究

土壤生物挥发性有机化合物（sBVOC）有助于生态系统排放，并在土壤生态系统中发挥重要作用。以前关于sBVOC的大多数研究都使用实验室研究了实验室中挖掘土壤的排放或裸露土壤的原位排放。但是到目前为止，很少考虑土壤中实际的BVOC浓度。在本文中，我们试图探索西部格陵兰岛北极荒地生态系统中的植被覆盖度与下方土壤中BVOC浓度之间的关系。在15厘米深的地方进行了原位测量，该地区主要由仙后座，黑胡椒，柳柳和桦在2015-2017年的生长季节，沿着36米长的样带混合植被覆盖的样带。sBVOC的浓度在不同的植被覆盖范围内有所不同，与Empetrum相比，在仙后座和桦树以下的浓度更高。此外，sBVOC浓度沿样条线有所不同，这种变化也部分与植被覆盖率的差异有关。此外，我们证明安装土壤探针（用于采样土壤空气）最多可在安装后1天改变sBVOC的成分和大小。