Relationships between climate change, phenology, edaphic factors, and net primary productivity across the Tibetan Plateau

Sun, Huaizhang; Chen, Yangbo; Xiong, Jie; Ye, Chongchong; Yong, Zhiwei; Wang, Yi; He, Dong; Xu, Shichao

doi:10.1016/j.jag.2022.102708

Cited by 28 publications

(38 citation statements)

References 68 publications

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“…Compared with other grassland types, temperate meadow is located in the northeast of the study area and has a humid to semi-humid monsoon climate with relatively more abundant water content ( Piao et al, 2006 ; Shen et al, 2018 ). Simultaneously, better hydrothermal conditions in summer promote the occurrence of a compensation effect ( Shen et al, 2018 ; Sun et al, 2022 ). Therefore, an increase in the minimum summer temperature is conducive to an increasing trend in NPP of temperate meadow.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

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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“…Noticeably, the positive correlation coefficients of vegetation ANPP with both temperature and precipitation were nonsignificant in forested areas in the northeastern and northern parts of the study area. This might be attributed to the more complex structure and higher productivity of forest ecosystems, and their increased resilience to climate change [2]. As the major vegetation cover type in the study area, grassland had poor ecosystem stability, which became more pronounced under long-term arid conditions.…”

Section: Relationship Between Changes In Vegetation Anpp and Meteorol...mentioning

confidence: 92%

“…The net primary productivity (NPP) of vegetation is expressed as the difference between the total amount of organic matter generated by the photosynthesis of vegetation in the ecosystem and amount of autotrophic respiration carried out by vegetation [1]. Vegetation NPP represents the carbon sequestration by an amount of vegetation per unit of time and space, directly reflecting the nutrient and energy storage potential of the terrestrial ecosystem [2], and is a key factor for estimating the carbon storage of vegetation. Vegetation NPP is a critical element of climate change studies [3] and ecosystem carbon balance, and is used to assess the health status and degree of sustainable development within an ecosystem.…”

Section: Introductionmentioning

confidence: 99%

Contributions of Climatic and Anthropogenic Drivers to Net Primary Productivity of Vegetation in the Mongolian Plateau

et al. 2022

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Global warming and intense human activity are altering the net primary productivity (NPP) of vegetation in arid and semi-arid regions where vegetation ecosystems are sensitive to climate change, including the Mongolian Plateau (MP). To deepen the understanding of the dynamics of vegetation and its driving factors on the MP, the actual NPP (ANPP) of the MP from 2000 to 2019 was estimated based on a modified Carnegie–Ames–Stanford Approach (CASA) model. The Thornthwaite Memorial and Guangsheng Zhou models were applied concurrently to estimate the potential NPP of the vegetation, and different scenarios were constructed to evaluate quantitatively the impact of climate change and human activity on the vegetation productivity of our study area. The results showed that the carbon sequestration capacities of various vegetation types in the MP differ, with forest > cropland > grassland > wetland. The NPP increased significantly during 2000–2019. Most areas showed a continuous and stable change in vegetation ANPP, with the current trend in variation mainly reflected in the continuous improvement of vegetation. In general, restoration of vegetation was prominent in the MP, and human activities affected more than 30% of vegetation restoration. The ANPP was positively correlated with temperature and precipitation, the latter of which had a more significant effect. Desertification management, restoration of cropland to forest and grassland, afforestation and reasonable grazing activities were the main human activities performed to restore vegetation. This study is expected to advance the theoretical understanding of ecological protection and sustainable development in the MP.

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“…NPP, a significant indicator of carbon cycle, is the basis of the energy and material cycle of the ecosystem, which is related to the carbon fixation capacity of the ecosystem (Brouwers and Coops, 2016;Xiao et al, 2019). Studies have indicated that climate variation can influence vegetation coverage, growth conditions and growing season duration, leading to NPP variation and the subsequent carbon cycle (Brouwers and Coops, 2016;Li et al, 2018;Sun et al, 2022). Therefore, it is of great significance to investigate the effects of climate change on NPP variation in wetland areas quantitatively.…”

Section: Introductionmentioning

confidence: 99%

Effects of climate changes on net primary productivity variation in the marsh area of the Sanjiang Plain

Yan

2022

Front. Ecol. Evol.

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The Sanjiang Plain includes the largest freshwater marsh in China, playing an important role in regional carbon cycle. As an important indicator of carbon cycle, the net primary productivity (NPP) is a crucial index for estimating the carbon storage of marshy wetlands. Investigating the association between climate factors and NPP variation quantitatively is of great significance for estimating carbon sequestration of marsh. Based on NPP data and climatic data from 1954 to 2014, the spatiotemporal change of NPP in marsh area was analyzed and its association with climate factors was investigated in the Sanjiang Plain in this study. The results indicated that the NPP showed an increase trend in the marsh area of the Sanjiang Plain in the past six decades. Temperate growth made the largest contribution to the NPP increase among the main climate factors in the last six decades, followed by CO2 concentration. Solar Radiation had the largest explanatory power on the spatial distribution of NPP among three climate factors before 1985. After 1985, temperature played an important role in leading the NPP distribution. Results also showed that the explanatory power of interactions between climate factors was stronger than that of single factor. Our results highlight the asymmetric effects of interactions between climate factors on marsh vegetation, which should be adequately considered in estimating carbon sequestration in marsh area in the Sanjiang Plain.

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Relationships between climate change, phenology, edaphic factors, and net primary productivity across the Tibetan Plateau

Cited by 28 publications

References 68 publications

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

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

Contributions of Climatic and Anthropogenic Drivers to Net Primary Productivity of Vegetation in the Mongolian Plateau

Effects of climate changes on net primary productivity variation in the marsh area of the Sanjiang Plain

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