Net Ecosystem Exchanges of Spruce Forest Carbon Dioxide Fluxes in Two Consecutive Years in Qilian Mountains
Source abstract
Abstract
The net ecosystem CO2 exchange (NEE) of spruce forest ecosystems is poorly understood by the lack of measurements of CO2 in the Qilian Mountain of Western China. Thus, we conducted consecutive measurements of CO2 fluxes using tower-based the eddy covariance method from 2021 to 2022. These results indicated that daily NEE of spruce forest indicated a robust temporal pattern ranging from −28.43 to 29.62 g C m−2 from 2021 to 2022. Remarkable carbon sink characteristics were presented from late May to late September. Month accumulative NEE fluxes ranged from −336.57 to 142.22 g C m−2 in two years. Additionally, average carbon sink was 591.51 ± 37.41 g C m−2 in Qilian Mountain. NEE was negatively driven by vapor pressure deficit (VPD) and average air temperature (p < 0.05), as determined using the structural equation model. However, the direct effect coefficient of precipitation on NEE was weak. VPD was positively driven by air temperature and negatively determined by precipitation. In conclusion, a future warming scenario would significantly decrease the carbon sink of the spruce forest in Qilian Mountain.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Plant Water Relations and Carbon Dynamics · Atmospheric and Environmental Gas Dynamics · Plant responses to elevated CO2
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Grassland Science and Technology, China Agriculture University, Beijing 100091, China
Minmetals Salt Lake Company, Xining 810001, China
College of Geosciences, Qinghai Normal University, Xining 810005, China
Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China
Funding
National Key R&D Program of China · National Natural Science Foundation in China
References (25)
Show source-provided references
1. Forests and climate change: Forcings, feedbacks, and the climate benefits of forests10.1126/science.1155121 ↗
2. From tree to forest: Multiple carbon sink constraints
3. A large and persistent carbon sink in the World’s forests10.1126/science.1201609 ↗
4. Compositional response of Amazon forests to climate change10.1111/gcb.14413 ↗
5. Carbon sinks and sources in China’s forests during 1901–200110.1016/j.jenvman.2006.09.019 ↗
6. Terrestrial carbon sinks in China and around the world and their contribution to carbon neutrality10.1007/s11427-021-2045-5 ↗
7. Retention of deposited ammonium and nitrate and its impact on the global forest carbon sink10.1038/s41467-022-28345-1 ↗
8. Meteorological tower observed CO2 flux and footprint in the forest of Xiaoxing’an Mountains, Northeast China10.1007/s13351-023-2080-3 ↗
9. CO2 flux evaluation over the evergreen coniferous and broad-leaved mixed forest in Dinghushan, China10.1007/s11430-006-8127-3 ↗
10. Du, Y., Pei, W.W., and Zhou, H. (2022). Net ecosystem exchange of carbon dioxide fluxes and its driving mechanism in the forests on the Tibetan Plateau. Biochem. Syst. Ecol., 103.10.1016/j.bse.2022.104451 ↗
11. Carbon and water exchange over a temperate semi-arid shrubland during three years of contrasting precipitation and soil moisture patterns10.1016/j.agrformet.2016.07.007 ↗
12. Yan, Y., Zhou, L., and Zhou, G. (2023). Extreme temperature events reduced carbon uptake of a boreal forest ecosystem in Northeast China: Evidence from an 11-year eddy covariance observation. Front. Plant Sci., 14.10.3389/fpls.2023.1119670 ↗
13. Mamkin, V., Varlagin, A., and Yaseneva, I. (2022). Response of spruce forest ecosystem CO2 fluxes to inter-annual climate anomalies in the Southern Taiga. Forests, 13.10.3390/f13071019 ↗
14. Park, S.B., Knohl, A., and Migliavacca, M. (2021). Temperature control of spring CO2 fluxes at a coniferous forest and a peat bog in Central Siberia. Atmosphere, 12.10.3390/atmos12080984 ↗
15. Different effects of spring and summer droughts on ecosystem carbon and water exchanges in a semiarid shrubland ecosystem in Northwest China10.1007/s10021-019-00379-5 ↗
16. Forest floor fluxes drive differences in the carbon balance of contrasting boreal forest stands10.1016/j.agrformet.2021.108454 ↗
17. Simulating carbon exchange of Canadian boreal forests: II. Comparing the carbon budgets of a boreal mixedwood stand to a black spruce forest stand10.1016/j.ecolmodel.2008.03.031 ↗
18. Seasonal variability of carbon dioxide, sensible and latent heat fluxes in a Northern Taiga Larch Forest of central siberia for eddy covariance flux measurements10.3103/S1068373922100089 ↗
19. Interannual variability in net ecosystem CO2 exchange at the arctic treeline10.1080/15230430.2001.12003417 ↗
20. CO2 fluxes before and after partial deforestation of a Central European spruce forest10.1016/j.agrformet.2019.04.009 ↗
21. Carbon dioxide and water exchange between spruce forest and atmosphere in spring—Summer under different weather conditions10.1134/S1995425519010116 ↗
22. Atmospheric water vapor and soil moisture jointly determine the spatiotemporal variations of CO2 fluxes and evapotranspiration across the Qinghai-Tibetan Plateau grasslands10.1016/j.scitotenv.2021.148379 ↗
23. Response of the carbon cycle in sub-arctic black spruce forests to climate change: Reduction of a carbon sink related to the sensitivity of heterotrophic respiration10.1016/j.agrformet.2008.10.011 ↗
24. Disentangling the effects of vapor pressure deficit on northern terrestrial vegetation productivity10.1126/sciadv.adf3166 ↗
25. Hemiboreal forests’ CO2 fluxes response to the European 2018 heatwave10.1016/j.agrformet.2022.109042 ↗