Spatiotemporal Variations in Nitrous Oxide Emissions from an Open Fen on the Qinghai–Tibetan Plateau: a 3-Year Study

Chen, Huai; Wang, Yanfen; Wu, Ning; Zhu, Dan; Li, Wei; Gao, Yongheng; Zhu, Qiuan; Yang, Guanying; Peng, Changhui

doi:10.1007/s11270-012-1336-9

Cited by 8 publications

(8 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… 17 , 30 , 45 Our data identify the exponential relationship between CH 4 emissions and WTD ( Figure 4 C). These results are consistent with the fact that the WTD determines the degree of aerobic and anaerobic metabolism in wetland sediments, 31 , 45 which in turn influences CH 4 production and oxidation. 26 , 29 In our experiments, CH 4 emissions were higher when the WTD was close to or above the soil surface, reflecting the fact that anaerobic conditions decrease the diffusion of oxygen, whereas when the WTD was below 30 cm, oxygen could diffuse more easily into the soil and promote microbial aerobic CH 4 oxidation.…”

Section: Discussionsupporting

confidence: 88%

“…The flux was both positive and negative at different times during the observation period, indicating that the Zoige wetland can function as N 2 O source or sink. 31 , 52 , 53 N 2 O is produced by the collaboration of nitrification and denitrification in soil. 3 Alternating oxic and anoxic conditions in wetlands can promote N 2 O production and emission.…”

Section: Discussionmentioning

confidence: 99%

“… 30 These wetlands substantially influence the regional GHGs budget. 31 During the past 50 years, the Zoige Plateau has experienced substantial warming and anthropogenic disturbance, 10 which has changed the WTD and consequently altered wetland structure and function. 29

Figure 1 Location of the study site …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An optimized water table depth detected for mitigating global warming potential of greenhouse gas emissions in wetland of Qinghai-Tibetan Plateau

Zhang,

Chen,

Wang

et al. 2024

iScience

Self Cite

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

An optimized water table depth detected for mitigating global warming potential of greenhouse gas emissions in wetland of Qinghai-Tibetan Plateau

Zhang,

Chen,

Wang

et al. 2024

iScience

Self Cite

View full text Add to dashboard Cite

“…Alpine peatland soils are usually sources of CO 2 , CH 4 , and N 2 O (Chen et al 2011(Chen et al , 2012Wang et al 2005), while alpine meadow soils are sources of CO 2 and N 2 O, but a sink of CH 4 (Jiang et al 2010). Studies have demonstrated that frozen soil thawing can affect annual gas budges due to increased CO 2 , CH 4 , and N 2 O emissions in several ecosystems Song et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Release of Carbon and Nitrogen from Alpine Soils During Thawing Periods in the Eastern Qinghai-Tibet Plateau

Gao

Zeng

Xie

et al. 2015

Water Air Soil Pollut

Self Cite

View full text Add to dashboard Cite

Soil thawing can affect the turnover of soil carbon (C) and nitrogen (N) and their release into the atmosphere. However, little has been known about the release of C and N during the thawing of alpine soils in the Qinghai-Tibet Plateau. This study investigated the effects of soil thawing on the release of CO 2 , CH 4 , and N 2 O from alpine peatland soils and alpine meadow soils through an indoor experiment and determined the changes in the dissolved organic C (DOC), dissolved organic N (DON), NO 3 − -N, NH 4 + -N, and NO 2 − -N concentrations in the soils after soil thawing. The freezethaw treatments were performed by incubating the soil columns at mild (−5°C) and severe (−15°C) for 14 days, and then at 5°C for 18 days. The control columns were incubated at 5°C. During thawing, the cumulative CO 2 emissions from the severely frozen alpine peatland soils and alpine meadow soils were 36 and 85 % higher than those from the control soils, and the cumulative N 2 O emissions were 3.9 and 5.8 times higher than those from the control soils. However, the thawing after mild freezing produced no significant effects. The two freezing temperatures significantly increased the release of CH 4 from the alpine peatland soils, but the thawing of the severely frozen soils reduced the CH 4 uptake of the alpine meadow soils by 27 %. After the severely frozen alpine peatland soils thawed, the concentrations of DOC, DON, NO 3 − -N, NH 4 + -N, and NO 2 − -N increased significantly, but NO 2 − -N showed no significant changes for the alpine meadow soils. After thawing with mild freezing, DOC in the alpine peatland soils and NH 4 + -N, NO 2 − -N, and DOC in the alpine meadow soils showed no significant changes. This study indicates that the potential for release of C and N from alpine soils during thawing periods strongly depends on the freezing temperature and soil types.

show abstract

“…In warm permafrost areas, the surface soils (0-50 cm depth) start to freeze at the end of October and begin to thaw in the beginning of May (Wu and Zhang, 2010). Biogeochemical processes and the associated soil microorganisms are particularly active in plant growth season from early May to late September (Chen et al 2012).…”

Section: Study Sitesmentioning

confidence: 99%

The roles of environmental variation and spatial distance in explaining diversity and biogeography of soil denitrifying communities in remote Tibetan wetlands

Jiang

Liu

Yao

et al. 2020

FEMS Microbiology Ecology

View full text Add to dashboard Cite

The relative importance of local environments and dispersal limitation in shaping denitrifier community structure remains elusive. Here, we collected soils from 36 riverine, lacustrine and palustrine wetland sites on the remote Tibetan Plateau and characterized the soil denitrifier communities using high-throughput amplicon sequencing of the nirS and nirK genes. Results showed that the richness of nirS-type denitrifiers in riverine wetlands was significantly higher than that in lacustrine wetlands but not significantly different from that in palustrine wetlands. There was no clear distinction in nir community composition among the three kinds of wetlands. Irrespective of wetland type, the soil denitrification rate was positively related to the abundance, but not the α-diversity, of denitrifying communities. Soil moisture, carbon availability and soil temperature were the main determinants of diversity [operational taxonomic unit (OTU) number] and abundance of thenirS-type denitrifier community, while water total organic carbon, soil NO3– and soil moisture were important in controlling nirK-type denitrifier diversity and abundance. The nirS community composition was influenced by water electrical conductivity, soil temperature and water depth, while the nirK community composition was affected by soil electrical conductivity. Spatial distance explained more variation in the nirS community composition than in the nirK community composition. Our findings highlight the importance of both environmental filtering and spatial distance in explaining diversity and biogeography of soil nir communities in remote and relatively undisturbed wetlands.

show abstract

Spatiotemporal Variations in Nitrous Oxide Emissions from an Open Fen on the Qinghai–Tibetan Plateau: a 3-Year Study

Cited by 8 publications

References 56 publications

An optimized water table depth detected for mitigating global warming potential of greenhouse gas emissions in wetland of Qinghai-Tibetan Plateau

An optimized water table depth detected for mitigating global warming potential of greenhouse gas emissions in wetland of Qinghai-Tibetan Plateau

Release of Carbon and Nitrogen from Alpine Soils During Thawing Periods in the Eastern Qinghai-Tibet Plateau

The roles of environmental variation and spatial distance in explaining diversity and biogeography of soil denitrifying communities in remote Tibetan wetlands

Contact Info

Product

Resources

About