Vegetation composition modulates the interaction of climate warming and elevated nitrogen deposition on nitrous oxide flux in a boreal peatland

Gong, Yu; Wu, Jianghua

doi:10.1111/gcb.15865

Cited by 13 publications

(6 citation statements)

References 54 publications

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“…In the typical steppe, N 2 O emission increased with the increases of plant aboveground biomass. Such a positive relationship was also found in previous studies, especially under N addition (Gong & Wu, 2021; Zhang et al., 2014). Nitrogen addition weakened the competition for N‐nutrient between plants and microorganisms.…”

Section: Discussionsupporting

confidence: 87%

“…A study in a restored peatland showed that nitrate uptake by Eriophorum vaginatum controlled N 2 O emission (Silvan et al., 2005). Nowadays, the plant effect on N 2 O emission was mainly focused on peatlands (Brummell et al., 2017; Gong & Wu, 2021). It is an increasing need to explore the effect of plants on soil N 2 O emission in uplands under the scenario of increasing precipitation and N deposition.…”

Section: Introductionmentioning

confidence: 99%

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Hot Moments of N₂O Emission Under Water and Nitrogen Management in Three Types of Steppe

et al. 2022

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Section: Discussionsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Hot Moments of N₂O Emission Under Water and Nitrogen Management in Three Types of Steppe

et al. 2022

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“…LULC changes may lead to the destruction of vegetation, resulting in changes in NDVI, and LULC may cause changes in microclimate, which in turn affects NDVI [80]. Factors other than land-use and temperature, precipitation, downgradient shortwave radiation, and CO 2 are ignored in our study, but nitrogen deposition [81], topography [82], and forest fires [83] can also affect changes in vegetation. The temporal and spatial precision of the land-use data in our study is not high enough.…”

Section: Discussionmentioning

confidence: 98%

Changes in Vegetation Greenness and Their Influencing Factors in Southern China

Zhao

et al. 2022

Remote Sensing

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Since the 21st century, China has experienced rapid development, and the spatial and temporal changes in vegetation cover have become increasingly significant. Southern China is a representative region for human activities, climate change, and vegetation change, but the current human understanding of the interactions between vegetation and its influencing factors is still very limited. In our study, we use NDVI as the vegetation greenness data, land cover data, temperature, precipitation, downgradient shortwave radiation, and CO2 data to investigate the interrelationship among vegetation, climate change, and human activities in southern China. The changes and their consistency were studied by trend analysis and Hurst exponent analysis. Then, the contribution of each influencing factor from 2001 to 2020 was quantified by random forest. The results showed that the vegetation in southern China showed an overall rising trend, and areas with a continuous changing trend were concentrated in the Pearl River Delta, western Guangdong, and eastern Guangdong, with a growth rate of 0.02∼0.04%. The vegetation in northern Guangdong did not change significantly. The main factor of NDVI spatial variation in southern China is the land-use factor, accounting for 79.4% of the variation, while climate factors produce further differences. The contributions and lagged effects of NDVI factors on different land-use types and the lagged effects of different climate factors are different and are related to the climate and vegetation background in Sourthern China. Our study is useful in estimating the contribution of NDVI change by each considered factor and formulating environmentally friendly regional development strategies and promoting human–land harmony.

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“…Data available from the Figshare: https://doi.org/10.6084/m9.figshare.22634356.v2 (Gong et al., 2023).…”

Section: Data Availability Statementmentioning

confidence: 99%

Vegetation composition regulates the interaction of warming and nitrogen deposition on net carbon dioxide uptake in a boreal peatland

Gong,

Wu,

Roulet

et al. 2023

Functional Ecology

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Peatlands are carbon sinks and have the potential to mitigate global warming. However, it is unclear whether peatlands will remain carbon sinks or switch to carbon sources under global changes, such as climate warming, elevated nitrogen (N) deposition and vegetation composition change. In this study, these global changes were mimicked in a boreal peatland for 7 years to explore the interactions of climate warming, elevated N deposition and vegetation composition on the carbon sink function of peatlands. The results showed that warming has a limited effect on net ecosystem production (NEP), while N addition decreased NEP by 65% owing to the detrimental effect on Sphagnum mosses. The negative impact of N addition on NEP could be mitigated by warming under intact vegetation. Under the treatment of graminoid removal, warming and elevated N addition (WN) decreased NEP by 80%–106%. Under the treatment of shrub removal, 7 years of WN treatment did not affect NEP. These results highlight the importance of vegetation composition in regulating net CO2 flux in peatlands. If peatlands shift to shrub‐dominated ecosystems, the net CO2 uptake in peatlands would be decreased under climate warming and elevated N deposition. If peatlands shift to graminoid‐dominated ecosystems, the net CO2 uptake in peatlands would be unaltered under climate warming and elevated N deposition. This study sheds new light on the interactions of climate warming, elevated N deposition, and vegetation composition change on the CO2 uptake of peatlands; and could help accurately evaluate the carbon sink function of peatlands under future global change. Read the free Plain Language Summary for this article on the Journal blog.

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Vegetation composition modulates the interaction of climate warming and elevated nitrogen deposition on nitrous oxide flux in a boreal peatland

Cited by 13 publications

References 54 publications

Hot Moments of N₂O Emission Under Water and Nitrogen Management in Three Types of Steppe

Hot Moments of N₂O Emission Under Water and Nitrogen Management in Three Types of Steppe

Changes in Vegetation Greenness and Their Influencing Factors in Southern China

Vegetation composition regulates the interaction of warming and nitrogen deposition on net carbon dioxide uptake in a boreal peatland

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Vegetation composition modulates the interaction of climate warming and elevated nitrogen deposition on nitrous oxide flux in a boreal peatland

Cited by 13 publications

References 54 publications

Hot Moments of N2O Emission Under Water and Nitrogen Management in Three Types of Steppe

Hot Moments of N2O Emission Under Water and Nitrogen Management in Three Types of Steppe

Changes in Vegetation Greenness and Their Influencing Factors in Southern China

Vegetation composition regulates the interaction of warming and nitrogen deposition on net carbon dioxide uptake in a boreal peatland

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Product

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Hot Moments of N₂O Emission Under Water and Nitrogen Management in Three Types of Steppe

Hot Moments of N₂O Emission Under Water and Nitrogen Management in Three Types of Steppe