Response of net reduction rate in vegetation carbon uptake to climate change across a unique gradient zone on the Tibetan Plateau

Sun, Jian; Ye, Chongchong; Liu, Miao; Wang, Yi; Chen, Ji; Wang, Shuai; Lü, Xianguo; Li, Guohua; Xu, Ming; Li, Renqiang; Liu, Shiliang; Zhou, Huakun; Du, Zhen‐Ting; Peng, Fei; Tsunekawa, Atsushi; Tsubo, Mitsuru

doi:10.1016/j.envres.2021.111894

Cited by 23 publications

(16 citation statements)

References 60 publications

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“…Numerous studies have demonstrated that climatic factors such as precipitation and temperature are also important drivers of SOC stock change (Du & Gao, 2020; Ganjurjav et al, 2016; Guo & Gifford, 2002; Sun et al, 2022; Yang et al, 2008). In this study, the loss of SOC at the same degradation level was significantly positively related to the mean annual precipitation (Figure 4).…”

Section: Discussionmentioning

confidence: 99%

“…Precipitation and temperature also play important roles in SOC stock change (Du & Gao, 2020;Sun et al, 2022). Firstly, precipitation and temperature regulate plant growth and thereby influence primary productivity, which is the main soil carbon source (Hu et al, 2010;Sun et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Once the soil carbon content exceeds the carbon saturation, soils lose the ability to protect the extra carbon, which can lead to soil carbon loss (Hassink, 1997; Meyer et al, 2017). Precipitation and temperature also play important roles in SOC stock change (Du & Gao, 2020; Sun et al, 2022). Firstly, precipitation and temperature regulate plant growth and thereby influence primary productivity, which is the main soil carbon source (Hu et al, 2010; Sun et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Soil organic carbon stock responded more sensitively to degradation in alpine meadows than in alpine steppes on the Qinghai‐Tibetan Plateau

Zhang

Zhan

et al. 2022

Land Degrad Dev

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Grassland degradation is commonly thought to cause soil organic carbon (SOC) change, and the response of SOC stock to degradation is highly dependent on grassland type. However, the effects of grassland type on changes in SOC stocks with grassland degradation over broad geographic scales remain unclear. Here, we explored the probably different responses of SOC stocks to grassland degradation for alpine meadows and alpine steppes based on 58 peer‐reviewed publications regarding the Qinghai‐Tibetan Plateau. The results showed that SOC stock consistently decreased with increasing degradation levels in both alpine meadows and steppes, whereas the magnitudes of reduction of SOC stock in alpine meadows were significantly larger than those in alpine steppes (p < 0.05). The variations in SOC stock were significantly positively correlated with variations in aboveground biomass in the alpine steppes only (p < 0.05) but were significantly positively correlated with variations in belowground biomass in both alpine meadows and alpine steppes (p < 0.01). The relationships between change rates of SOC stock with initial SOC stock and mean annual precipitation were both significantly negative during the lightly and moderately degraded stages, while the negative relationship became nonsignificant for the heavily degraded stage (p > 0.05). These findings suggest that soil organic carbon stock responded more sensitively to degradation in alpine meadows with higher initial SOC stock and annual mean precipitation than in alpine steppes. Our study might have significant implications for future sustainable management practices for carbon sequestration of alpine grasslands on the Qinghai‐Tibetan Plateau.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Soil organic carbon stock responded more sensitively to degradation in alpine meadows than in alpine steppes on the Qinghai‐Tibetan Plateau

Zhang

Zhan

et al. 2022

Land Degrad Dev

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“…This indicates that the increase in temperature may increase the decomposition of SOM, change the activity of extracellular enzymes, thereby changing the strategy of the microbial community to obtain nutrients, control the biogeochemical cycle of soil nutrients, and lead to an increase in CO 2 emissions [ 49 , 50 ]; at the same time, the nutrients released by SOM decomposition and microbial activities are beneficial to plant growth, leading to enhanced photosynthesis and respiration. However, Tef is negatively correlated with RE and GEE, which indicates that the increase in extreme weather will increase the mortality of vegetation [ 56 , 57 , 58 ] and reduce photosynthesis and respiration [ 59 ]. In TG and SACF, Tave was the main influencing factor for RE and GEE.…”

Section: Discussionmentioning

confidence: 99%

Effect of Climate Change on CO2 Flux in Temperate Grassland, Subtropical Artificial Coniferous Forest and Tropical Rain Forest Ecosystems

Man

Che

Xie

et al. 2021

IJERPH

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The interactions between CO2 flux, an important component of ecosystem carbon flux, and climate change vary significantly among different ecosystems. In this research, the inter-annual variation characteristics of ecosystem respiration (RE), gross ecosystem exchange (GEE), and net ecosystem exchange (NEE) were explored in the temperate grassland (TG) of Xilinhot (2004–2010), the subtropical artificial coniferous forest (SACF) of Qianyanzhou (2003–2010), and the tropical rain forest (TRF) of Xishuangbanna (2003–2010). The main factors of climate change affecting ecosystem CO2 flux were identified by redundancy analysis, and exponential models and temperature indicators were constructed to consider the relationship between climate change and CO2 flux. Every year from 2003 to 2010, RE and GEE first increased and then decreased, and NEE showed no significant change pattern. TG was a carbon source, whereas SACF and TRF were carbon sinks. The influence of air temperature on RE and GEE was greater than that of soil temperature, but the influence of soil moisture on RE and GEE was greater than that of air moisture. Compared with moisture and photosynthetically active radiation, temperature had the greatest impact on CO2 flux and the exponential model had the best fitting effect. In TG and SACF, the average temperature was the most influential factor, and in TRF, the accumulated temperature was the most influential factor. These results provide theoretical support for mitigating and managing climate change and provide references for achieving carbon neutrality.

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“…In addition, the ecosystems on the QTP are extremely sensitive to warming climate. Numerous studies on the QTP have focused on the response of terrestrial ecosystem productivity to climate change during the 1980s ( Ye et al., 2020 ; Sun et al., 2022a ; Sun et al., 2022b ). However, the terrestrial ecosystem productivity shows significant effects of natural variability and anthropogenic forcing, but the superposition of natural and anthropogenic influences on terrestrial carbon cycling during this period makes it difficult to sort out both effects ( Lehner et al., 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Tropical volcanic eruptions reduce vegetation net carbon uptake on the Qinghai–Tibet Plateau under background climate conditions

et al. 2023

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The vegetation carbon uptake plays an important role in the terrestrial carbon cycle on the Qinghai–Tibet Plateau (QTP), while it is extremely sensitive to the impact of natural external forcings. Until now, there is limited knowledge on the spatial-temporal patterns of vegetation net carbon uptake (VNCU) after the force that caused by tropical volcanic eruptions. Here, we conducted an exhaustive reconstruction of VNCU on the QTP over the last millennium, and used a superposed epoch analysis to characterize the VNCU response of the QTP after the tropical volcanic eruptions. We then further investigated the divergent changes of VNCU response across different elevation gradients and vegetation types, and the impact of teleconnection forcing on VNCU after volcanic eruptions. Within a climatic background, we found that VNCU of the QTP tends to decrease after large volcanic eruptions, lasting until about 3 years, with a maximum decrease value occurring in the following 1 year. The spatial and temporal patterns of the VNCU were mainly driven by the post-eruption climate and moderated by the negative phase trends of El Niño-Southern Oscillation and the Atlantic multidecadal oscillation. In addition, elevation and vegetation types were undeniable driving forces associated with VNCU on QTP. Different water-heat conditions and vegetation types contributed to significant differences in the response and recovery processes of VNCU. Our results emphasized the response and recovery processes of VNCU to volcanic eruptions without the strong anthropogenic forcings, while the influence mechanisms of natural forcing on VNCU should receive more attention.

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Response of net reduction rate in vegetation carbon uptake to climate change across a unique gradient zone on the Tibetan Plateau

Cited by 23 publications

References 60 publications

Soil organic carbon stock responded more sensitively to degradation in alpine meadows than in alpine steppes on the Qinghai‐Tibetan Plateau

Soil organic carbon stock responded more sensitively to degradation in alpine meadows than in alpine steppes on the Qinghai‐Tibetan Plateau

Effect of Climate Change on CO2 Flux in Temperate Grassland, Subtropical Artificial Coniferous Forest and Tropical Rain Forest Ecosystems

Tropical volcanic eruptions reduce vegetation net carbon uptake on the Qinghai–Tibet Plateau under background climate conditions

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