Trends in climate change and human interventions indicate grassland productivity on the Qinghai–Tibetan Plateau from 1980 to 2015

Xiong, Qinli; Xiao, Yang; Liang, Pinghan; Li, Lingjuan; Zhang, Lin; Li, Ting; Pan, Kaiwen; Liu, Chenggang

doi:10.1016/j.ecolind.2021.108010

Cited by 49 publications

(28 citation statements)

References 46 publications

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“…In addition, excessive solar radiation increased evaporation of surface soil and limited water availability, which may prevent the growth of herbaceous plants with shallow root systems (Yang et al, 2017). Precipitation had a suppressive effect on grassland growth in southeastern plateau (Gao et al, 2013;Xiong et al, 2021), and its increase may reduce solar radiation, which inhibits photosynthesis (Yang et al, 2015). Alternatively, precipitation could contribute to soil erosion, which decreased soil organic matter content, and reduced alpine grassland NPP (Xu et al, 2016).…”

Section: Impacts Of Climate Factors On Npp Changesmentioning

confidence: 99%

“…Recently, several methods have been adopted to determine the interaction of climate factors and human activities on vegetation dynamics, such as the regression model method, redundancy analysis, and the Miami memorial model Wu N. et al, 2021;Xiong et al, 2021). The regression model method is the simplest, but it is hard to describe the complex interactions between vegetation and climatic factors, between that and human activities (Turner and Carpenter, 2017;Liu et al, 2020), and independent variable factors are difficult to quantify spatially, lead to uncertainties in the results (Wu N. et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Quantifying the contributions of climate factors and human activities to variations of net primary productivity in China from 2000 to 2020

Chen

Chen³

et al. 2023

Front. Earth Sci.

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Net primary productivity (NPP) plays a vital role in the globe carbon cycle. Quantitative assessment of the effects of climate changes and human activities on net primary productivity dynamics is vital for understanding the driving mechanisms of vegetation change and sustainable development of ecosystems. This study investigates the contributions of climatic factors and human activities to vegetation productivity changes in China from 2000 to 2020 based on the residual trend analysis (RESTREND) method. The results showed that the annual average net primary productivity in China was 325.11 g C/m2/year from 2000 to 2020 and net primary productivity showed a significantly increasing trend (p<0.05) at a rate of 2.32 g C/m2/year. Net primary productivity increased significantly (p<0.05) across 40.90% of China over the study period, while only 1.79% showed a significantly declining trend (p<0.05). The contributions of climatic factors and human activities to net primary productivity increase were 1.169 g C/m2/year and 1.142 g C/m2/year, respectively. Climate factors contributed positively mainly in Sichuan Basin, the Loess Plateau, the Mongolian Plateau, and Northeast China Plain. Positive contributions of human activities to net primary productivity mainly occurred in the Loess Plateau, Central China, and the Greater Khingan Mountains. The effects of climatic factors and human activities on net primary productivity changes varied among sub-regions. In Tropical Monsoon Climate Region and Subtropical Monsoon Climate Region, human activities had greater impacts on net primary productivity increase than climate factors, while climate factors were the dominant factor for net primary productivity recovery in other sub-regions. In addition, during 2000–2020, net primary productivity was dominated by both climate factors and human activities in 49.84% of China, while areas dominated solely by climate factors and human activities accounted for 13.67% and 10.92%, respectively. Compared to changed land cover types, the total net primary productivity as well as the increase of total net primary productivity in China was mostly contributed by unchanged land cover types, which contributed more than 90%.

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Section: Impacts Of Climate Factors On Npp Changesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantifying the contributions of climate factors and human activities to variations of net primary productivity in China from 2000 to 2020

Chen

Chen³

et al. 2023

Front. Earth Sci.

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“…It was not only related to the implementation of 'returning farmland to forest and grassland' policy, but also to the remarkable achievements in soil erosion control (Bi et al, 2021;Zinda et al, 2017). The regions with high demand of carbon sequestration service on the Qinghai-Tibetan Plateau were mainly characterized by intense human activities (Xiong et al, 2021;Wang et al, 2022). For example, Xining and Haidong had the largest demand of carbon sequestration service.…”

Section: The Implications For Management Of Carbon Sequestration Servicementioning

confidence: 99%

Quantifying Carbon Sequestration Service Flow Associated with Human Activities Based on Network Model on the Qinghai-Tibetan Plateau

Wang

Liu

Wang

et al. 2022

Front. Environ. Sci.

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The flow of ecosystem services between regions as a result of the mismatch of supply and demand has increasingly become a new research focus. Clarifying the spatial regularity of ecosystem service flow is of great significance for realizing regional sustainable development and improving human well-being. This study applied a network model to map the interregional carbon flow based on the supply and demand of carbon sequestration service, and the driving effect of various driving factors was further analyzed. The results showed that the demand for carbon sequestration service on the Qinghai-Tibet Plateau increased steadily from 2000 to 2019, resulting in an increasingly significant difference between supply and demand with more than 20 million tons. In the carbon sequestration service flow network, the number of defined deficit nodes increased to 22 in 2010, but decreased to 21 in 2019. The interrupted edges continued to increase to 16, and the network density dropped to 0.022. The carbon sequestration service flow network on the northeastern parts of the Qinghai-Tibet Plateau was severely damaged. With the high-quality development of animal husbandry, the impact of grazing intensity on the difference between the supply and demand of carbon sequestration service has been weakened. When urbanization reached a certain level, the driving effects of urbanization and agricultural activities increased significantly. The study provided a reference for the use of network models to analyze ecosystem service flow, and provided a theoretical basis and data support for local ecological management decisions.

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“…Net primary productivity (NPP) is not only a crucial indicator of carbon sequestration ( Zhang et al, 2016 ; Hossain et al, 2021 ), but also a key reference for assessing grassland ecosystem function ( Seeber et al, 2022 ; Wang et al, 2022 ). Previous studies have shown that climate change has significant effects on grassland NPP ( Liu et al, 2021 ; Xiong et al, 2021 ). In the past few decades, global grassland NPP has undergone significant changes owing to climate change ( Cao et al, 2020 ; Li et al, 2022 ), which may affect the ecological environment and carbon cycle in the grassland regions ( Shen et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Change of Net Primary Productivity and Its Response to Climate Change in Temperate Grasslands of China

Xia

Liu

et al. 2022

Front. Plant Sci.

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The temperate grasslands in China play a vital part in regulating regional carbon cycle and climate change. Net primary productivity (NPP) is a crucial index that reflects ecological function of plants and the carbon sequestration capacity of grassland ecosystem. Climate change can affect NPP by changing vegetation growth, but the effects of climate change on the NPP of China’s temperate grasslands remain unclear. Based on MODIS data and monthly climate data during 2000–2020, this study explored the spatiotemporal changes in grassland NPP and its response to climate change in temperate grasslands of China. We found that the annual NPP over the entire China’s temperate grasslands increased significantly by 4.0 gC/m2/year from 2000 to 2020. The annual NPP showed increasing trends for all the different grassland vegetation types, with the smallest increase for temperate desert steppe (2.2 gC/m2/year) and the largest increase for temperate meadow (5.4 gC/m2/year). The correlation results showed that increased annual precipitation had a positive relationship with the NPP of temperate grasslands. Increased summer and autumn precipitation could increase grassland NPP, particularly for the temperate meadow. With regard to the effects of temperatures, increased temperature, particularly the summer maximum temperature, could decrease annual NPP. However, increased spring minimum temperature could increase the NPP of temperate desert steppe. In addition, this study found, for the first time, an asymmetric relationship between summer nighttime and daytime warming and the NPP of temperate meadow. Specifically, nighttime warming can increase NPP, while daytime warming can reduce NPP in temperate meadow. Our results highlight the importance of including seasonal climate conditions in assessing the vegetation productivity for different grassland types of temperate grasslands and predicting the influences of future climate change on temperate grassland ecosystems.

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Trends in climate change and human interventions indicate grassland productivity on the Qinghai–Tibetan Plateau from 1980 to 2015

Cited by 49 publications

References 46 publications

Quantifying the contributions of climate factors and human activities to variations of net primary productivity in China from 2000 to 2020

Quantifying the contributions of climate factors and human activities to variations of net primary productivity in China from 2000 to 2020

Quantifying Carbon Sequestration Service Flow Associated with Human Activities Based on Network Model on the Qinghai-Tibetan Plateau

Spatiotemporal Change of Net Primary Productivity and Its Response to Climate Change in Temperate Grasslands of China

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