Soil respiration database at different time scales in forest ecosystems across China

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Abstract
China’s forests rank fifth in the world by area and cover a broad climatic gradient from cold-temperate to tropical zones, and play a key role in the global carbon cycle. Studies on forest soil respiration (Rs) are increasing rapidly in China over the last two decades, but the resulting Rs data need to be summarized. Here, we compile a comprehensive database of Rs in China’s undisturbed forest ecosystems from literature published up to December 31, 2018, including monthly Rs and the concurrently measured soil temperature (N = 8317), mean monthly Rs (N = 5003), and annual Rs (N = 634). Detailed plot information was also recorded, such as geographical location, climate factors, stand characteristics, and measurement description. We examine some aspects of the database – Rs equations fitted with soil temperature, temperature sensitivity (Q10), monthly variations and annual effluxes in cold-temperate, temperate, subtropical and tropical zones. We hope the database will be used by the science community to provide a better understanding of carbon cycle in China's forest ecosystems and reduce uncertainty in evaluating of carbon budget at the large scale. The database is publicly available at https://www.pangaea.de/tok/788910d8d3ae0a415c7bad2e7025a3f16f042a1b (Sun et al. 2021).
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Funding Information
  • National Natural Science Foundation of China (32071592)
  • National Key Research and Development Program of China (2017YFC0503906)

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