Opposite response of N2O emissions in different seasons to warming and precipitation addition on a temperate steppe
Abstract Climate change is an important issue that affects both global warming and precipitation, and the main cause is increased N2O emissions. Temperature and moisture are key factors in grassland ecosystem's response to climate change, and they can affect N2O fluxes. To clarify the impacts o...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-06-01
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| Series: | Ecosphere |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ecs2.4598 |
| _version_ | 1797219398210027520 |
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| author | Zhiqiang Wan Rui Gu Hasbagan Ganjurjav Guozheng Hu Qingzhu Gao Xuemeng Chen Xiling Gu Xi Chun Haijun Zhou |
| author_facet | Zhiqiang Wan Rui Gu Hasbagan Ganjurjav Guozheng Hu Qingzhu Gao Xuemeng Chen Xiling Gu Xi Chun Haijun Zhou |
| author_sort | Zhiqiang Wan |
| collection | DOAJ |
| description | Abstract Climate change is an important issue that affects both global warming and precipitation, and the main cause is increased N2O emissions. Temperature and moisture are key factors in grassland ecosystem's response to climate change, and they can affect N2O fluxes. To clarify the impacts of warming and precipitation changes on N2O fluxes, an experiment was conducted in a semiarid steppe in Inner Mongolia, China over a nine‐year period (2011–2019). Plant productivity and soil nutrient dynamics were examined concurrently from 2017 to 2019, and N2O fluxes were monitored in response to different treatment conditions: control (C), warming (W), precipitation addition (P), and warming and precipitation addition (WP). The results showed that N2O emissions in the growing season were higher than those in the nongrowing season. Warming and precipitation addition had no significant effect on N2O fluxes compared with ambient conditions. Compared with P treatment, warming increased N2O flux in nongrowing season and decreased it in growing season. N2O flux was positively correlated with soil temperature and moisture (p < 0.05). Warming had a significant positive effect on soil NH4+‐N, whereas additional precipitation had a large positive effect on soil total nitrogen and soil nitrate nitrogen. With the WP treatment, soil microbial biomass nitrogen (MBN) and soil microbial biomass carbon (MBC) increased by 53.8% and 41.9%, respectively. The decrease in N2O emissions during the growing season in the W treatment compared with the P treatment may be largely attributed to the greater dominance of Leymus chinensis. The results highlight that changes in species dominance play an important role in regulating N2O emissions, and that the N2O fluxes in the nongrowing season account for a large proportion of the changes in N2O fluxes. Therefore, The warming effects on N2O emissions during nongrowing seasons should be further investigated. |
| first_indexed | 2024-03-13T02:34:22Z |
| format | Article |
| id | doaj.art-86d645f36c3a4c3887c4c0d008f5cd95 |
| institution | Directory Open Access Journal |
| issn | 2150-8925 |
| language | English |
| last_indexed | 2024-04-24T12:33:01Z |
| publishDate | 2023-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Ecosphere |
| spelling | doaj.art-86d645f36c3a4c3887c4c0d008f5cd952024-04-07T23:33:20ZengWileyEcosphere2150-89252023-06-01146n/an/a10.1002/ecs2.4598Opposite response of N2O emissions in different seasons to warming and precipitation addition on a temperate steppeZhiqiang Wan0Rui Gu1Hasbagan Ganjurjav2Guozheng Hu3Qingzhu Gao4Xuemeng Chen5Xiling Gu6Xi Chun7Haijun Zhou8College of Geographical Science/Key Laboratory of Mongolian Plateau's Climate System Inner Mongolia Normal University Hohhot ChinaCollege of Grassland, Resources and Environment, Inner Mongolia Agricultural University Hohhot ChinaInstitute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences Beijing ChinaInstitute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences Beijing ChinaInstitute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences Beijing ChinaCollege of Geographical Science/Key Laboratory of Mongolian Plateau's Climate System Inner Mongolia Normal University Hohhot ChinaCollege of Geographical Science/Key Laboratory of Mongolian Plateau's Climate System Inner Mongolia Normal University Hohhot ChinaCollege of Geographical Science/Key Laboratory of Mongolian Plateau's Climate System Inner Mongolia Normal University Hohhot ChinaCollege of Geographical Science/Key Laboratory of Mongolian Plateau's Climate System Inner Mongolia Normal University Hohhot ChinaAbstract Climate change is an important issue that affects both global warming and precipitation, and the main cause is increased N2O emissions. Temperature and moisture are key factors in grassland ecosystem's response to climate change, and they can affect N2O fluxes. To clarify the impacts of warming and precipitation changes on N2O fluxes, an experiment was conducted in a semiarid steppe in Inner Mongolia, China over a nine‐year period (2011–2019). Plant productivity and soil nutrient dynamics were examined concurrently from 2017 to 2019, and N2O fluxes were monitored in response to different treatment conditions: control (C), warming (W), precipitation addition (P), and warming and precipitation addition (WP). The results showed that N2O emissions in the growing season were higher than those in the nongrowing season. Warming and precipitation addition had no significant effect on N2O fluxes compared with ambient conditions. Compared with P treatment, warming increased N2O flux in nongrowing season and decreased it in growing season. N2O flux was positively correlated with soil temperature and moisture (p < 0.05). Warming had a significant positive effect on soil NH4+‐N, whereas additional precipitation had a large positive effect on soil total nitrogen and soil nitrate nitrogen. With the WP treatment, soil microbial biomass nitrogen (MBN) and soil microbial biomass carbon (MBC) increased by 53.8% and 41.9%, respectively. The decrease in N2O emissions during the growing season in the W treatment compared with the P treatment may be largely attributed to the greater dominance of Leymus chinensis. The results highlight that changes in species dominance play an important role in regulating N2O emissions, and that the N2O fluxes in the nongrowing season account for a large proportion of the changes in N2O fluxes. Therefore, The warming effects on N2O emissions during nongrowing seasons should be further investigated.https://doi.org/10.1002/ecs2.4598climate changegrowing seasonN2O fluxnongrowing seasonprecipitationtemperate steppe |
| spellingShingle | Zhiqiang Wan Rui Gu Hasbagan Ganjurjav Guozheng Hu Qingzhu Gao Xuemeng Chen Xiling Gu Xi Chun Haijun Zhou Opposite response of N2O emissions in different seasons to warming and precipitation addition on a temperate steppe Ecosphere climate change growing season N2O flux nongrowing season precipitation temperate steppe |
| title | Opposite response of N2O emissions in different seasons to warming and precipitation addition on a temperate steppe |
| title_full | Opposite response of N2O emissions in different seasons to warming and precipitation addition on a temperate steppe |
| title_fullStr | Opposite response of N2O emissions in different seasons to warming and precipitation addition on a temperate steppe |
| title_full_unstemmed | Opposite response of N2O emissions in different seasons to warming and precipitation addition on a temperate steppe |
| title_short | Opposite response of N2O emissions in different seasons to warming and precipitation addition on a temperate steppe |
| title_sort | opposite response of n2o emissions in different seasons to warming and precipitation addition on a temperate steppe |
| topic | climate change growing season N2O flux nongrowing season precipitation temperate steppe |
| url | https://doi.org/10.1002/ecs2.4598 |
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