Increases in the Methane Uptake of Upland Forest Soil in China Could Significantly Contribute to Climate Change Mitigation
Upland forest soil is an important CH<sub>4</sub> sink that plays a key role in climate change mitigation. China features large areas of various types of forest, but spatiotemporal variation in CH<sub>4</sub> flux has not yet been clarified. Here, we analyzed variation in CH&...
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MDPI AG
2022-08-01
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| Series: | Forests |
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| Online Access: | https://www.mdpi.com/1999-4907/13/8/1270 |
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| author | Meng Yang |
| author_facet | Meng Yang |
| author_sort | Meng Yang |
| collection | DOAJ |
| description | Upland forest soil is an important CH<sub>4</sub> sink that plays a key role in climate change mitigation. China features large areas of various types of forest, but spatiotemporal variation in CH<sub>4</sub> flux has not yet been clarified. Here, we analyzed variation in CH<sub>4</sub> flux and the effects of environmental variables on the CH<sub>4</sub> flux of forest in China using in situ observational data. Upland forest soil absorbed CH<sub>4</sub> at a rate of 0.24 ± 0.02 g m<sup>−2</sup> yr<sup>−1</sup>. The CH<sub>4</sub> uptake rate (0.46 ± 0.10 g m<sup>−2</sup> yr<sup>−1</sup>) of warm temperate deciduous broad-leaved forest was the highest. Soil alkali-hydrolyzable nitrogen was the only factor significantly correlated with CH<sub>4</sub> uptake variation among vegetation zones. A break point in CH<sub>4</sub> uptake over the study period (from 1997 to 2020) was detected in 2015. CH<sub>4</sub> uptake slightly decreased until 2015 and increased after 2015. The mean CH<sub>4</sub> uptake of the period after 2015 (0.44 ± 0.07 g m<sup>−2</sup> yr<sup>−1</sup>) was significantly higher than that before 2015 (0.20 ± 0.02 g m<sup>−2</sup> yr<sup>−1</sup>). Atmospheric nitrogen deposition was negatively related to interannual CH<sub>4</sub> uptake. Our findings suggest that the CH<sub>4</sub> uptake of upland forest soil will continue to increase over the next few decades as China accelerates efforts to achieve its carbon neutrality goal, and this would result in continuous decreases in nitrogen deposition through various pathways. |
| first_indexed | 2024-03-09T13:25:15Z |
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| id | doaj.art-55cdda1dc3fc4043bc2e26b821c053b3 |
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| language | English |
| last_indexed | 2024-03-09T13:25:15Z |
| publishDate | 2022-08-01 |
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| spelling | doaj.art-55cdda1dc3fc4043bc2e26b821c053b32023-11-30T21:25:05ZengMDPI AGForests1999-49072022-08-01138127010.3390/f13081270Increases in the Methane Uptake of Upland Forest Soil in China Could Significantly Contribute to Climate Change MitigationMeng Yang0Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, ChinaUpland forest soil is an important CH<sub>4</sub> sink that plays a key role in climate change mitigation. China features large areas of various types of forest, but spatiotemporal variation in CH<sub>4</sub> flux has not yet been clarified. Here, we analyzed variation in CH<sub>4</sub> flux and the effects of environmental variables on the CH<sub>4</sub> flux of forest in China using in situ observational data. Upland forest soil absorbed CH<sub>4</sub> at a rate of 0.24 ± 0.02 g m<sup>−2</sup> yr<sup>−1</sup>. The CH<sub>4</sub> uptake rate (0.46 ± 0.10 g m<sup>−2</sup> yr<sup>−1</sup>) of warm temperate deciduous broad-leaved forest was the highest. Soil alkali-hydrolyzable nitrogen was the only factor significantly correlated with CH<sub>4</sub> uptake variation among vegetation zones. A break point in CH<sub>4</sub> uptake over the study period (from 1997 to 2020) was detected in 2015. CH<sub>4</sub> uptake slightly decreased until 2015 and increased after 2015. The mean CH<sub>4</sub> uptake of the period after 2015 (0.44 ± 0.07 g m<sup>−2</sup> yr<sup>−1</sup>) was significantly higher than that before 2015 (0.20 ± 0.02 g m<sup>−2</sup> yr<sup>−1</sup>). Atmospheric nitrogen deposition was negatively related to interannual CH<sub>4</sub> uptake. Our findings suggest that the CH<sub>4</sub> uptake of upland forest soil will continue to increase over the next few decades as China accelerates efforts to achieve its carbon neutrality goal, and this would result in continuous decreases in nitrogen deposition through various pathways.https://www.mdpi.com/1999-4907/13/8/1270CH<sub>4</sub> uptakeforest typeslong-term variationenvironmental variablenitrogen deposition |
| spellingShingle | Meng Yang Increases in the Methane Uptake of Upland Forest Soil in China Could Significantly Contribute to Climate Change Mitigation Forests CH<sub>4</sub> uptake forest types long-term variation environmental variable nitrogen deposition |
| title | Increases in the Methane Uptake of Upland Forest Soil in China Could Significantly Contribute to Climate Change Mitigation |
| title_full | Increases in the Methane Uptake of Upland Forest Soil in China Could Significantly Contribute to Climate Change Mitigation |
| title_fullStr | Increases in the Methane Uptake of Upland Forest Soil in China Could Significantly Contribute to Climate Change Mitigation |
| title_full_unstemmed | Increases in the Methane Uptake of Upland Forest Soil in China Could Significantly Contribute to Climate Change Mitigation |
| title_short | Increases in the Methane Uptake of Upland Forest Soil in China Could Significantly Contribute to Climate Change Mitigation |
| title_sort | increases in the methane uptake of upland forest soil in china could significantly contribute to climate change mitigation |
| topic | CH<sub>4</sub> uptake forest types long-term variation environmental variable nitrogen deposition |
| url | https://www.mdpi.com/1999-4907/13/8/1270 |
| work_keys_str_mv | AT mengyang increasesinthemethaneuptakeofuplandforestsoilinchinacouldsignificantlycontributetoclimatechangemitigation |