Carbon Balance of Grasslands on the Qinghai-Tibet Plateau under Future Climate Change: A Review

Leng, Rong; Yuan, Quanzhi; Wang, Yushuang; Kuang, Qian; Ren, Ping

doi:10.3390/su12020533

Cited by 13 publications

(5 citation statements)

References 105 publications

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“…There are few land resources suitable for cultivated land, but it is more suitable for forage. The dominant ecosystem type in the QTP is the grassland ecosystem [20], which is essential for development of animal husbandry. Correspondingly, the residents in the QTP had higher consumption of beef, mutton, and milk, and lower consumption of vegetables and aquatic products than the residents in other regions.…”

Section: Introductionmentioning

confidence: 99%

Food and Grain Consumption Per Capita in the Qinghai–Tibet Plateau and Implications for Conservation

2021

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Background: Grain security is crucial for social stability and ecosystem conservation regionally and globally, and it is particularly concerned widely in the Qinghai-Tibet Plateau (QTP) due to its high altitude and harsh climate for agriculture. Method: In this paper, we calculated and analyzed per capita food and grain consumption, including direct grain consumption, grain for fodder, industry consumption, seeds consumption, and wastage consumption and its changes in the QTP during 1995–2019. Results: The results showed that (1) in 2019, the average food consumption per capita was 333.35 kg, was stable since 1995. The dietary structure of residents was composed of direct grain consumption (44.15%), meat (10.72%), and milk (6.94%). The consumption of meat and milk was higher than the national average. (2) The average daily intake of energy and protein, animal protein, and the ratio of high-quality protein and fat energy were 2156.21 kcal·d−1, 73.53 g·d−1, 23.06 g·d−1, 38.32%, and 27.77% in 2019. Their changes were −342.98 kcal·d−1, −8.91 g·d−1, 11.16 g·d−1, 18.37%, and 11.08%, respectively. (3) The corresponding grain consumption per capita was 284.90 kg·a−1 in 1995, 262.19 kg·a−1 in 2010, and then remained stable until 2019. Conclusion: The study suggested that food consumption per capital was guaranteed at the well-off level since 2010, and food and dietary structure of residents were corresponding to physical geographic and climatic environment in the QTP. The conflict between food security and the ecosystem conservation can be managed without scarifying nature as the total grain consumption was stable since 2010, and the yield per unit area and total grain yield were both increasing since 2003 for agricultural condition improved in the QTP.

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Section: Introductionmentioning

confidence: 99%

Food and Grain Consumption Per Capita in the Qinghai–Tibet Plateau and Implications for Conservation

2021

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“…Recently, research on the Tibetan Plateau and the impact of human activities has notably progressed 14 , 15 . Human activities and their ecological impacts on the plateau have been extensively investigated.…”

Section: Introductionmentioning

confidence: 99%

Assessing the spatial occupation and ecological impact of human activities in Chengguan district, Lhasa city, Tibetan Plateau

Xu,

Duan

et al. 2024

Sci Rep

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In this study, the ecological impact of human activities and the space occupied by construction and arable land on the Tibetan Plateau were examined, focusing on changes in the net primary productivity (NPP) as a key indicator of ecological health. With the utilization of land use data and multiyear average NPP data from 2002 to 2020, we analyzed the effects of the conversion of zonal vegetation into construction and arable land on carbon sequestration and oxygen release in Chengguan District, Lhasa city. Our findings indicated a marked spatial difference in the NPP among different land types. Regarding the original zonal vegetation, the NPP ranged from 0.2 to 0.3 kg/m2. Construction land showed a decrease in the NPP, with values ranging from 0.16 to 0.26 kg/m2, suggesting a decrease in ecological productivity. Conversely, arable land exhibited an increase in the NPP, with average values exceeding 0.3 kg/m2. This increase suggested enhanced productivity, particularly in regions where the original zonal vegetation provided lower NPP values. However, this enhanced productivity may not necessarily indicate a positive ecological change. In fact, such increases could potentially disrupt the natural balance of ecosystems, leading to unforeseen ecological consequences. The original zonal vegetation, with NPP values ranging from 0.12 to 0.43 kg/m2, exhibited higher ecological stability and adaptability than the other land types. This wider NPP range emphasizes the inherent resilience of native vegetation, which could sustain diverse ecological functions under varying environmental conditions. These findings demonstrate the urgent need for sustainable land use management on the Tibetan Plateau. This study highlights the importance of considering the ecological impact of land use changes in regional development strategies, ensuring the preservation and enhancement in the unique and fragile plateau ecosystem.

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“…In the other hand, these authors showed that soil C stocks increase after land use changes from native forest to grassland (+8%), farmland to grassland (+19%), farmland to plantation (+18%), and farmland to secondary forest (+53%). The importance of grasslands is remarked by Leng et al (2020) [62] showing that the organic carbon content of a plateau meadow in China increased when the disturbance intensity was small. However, an apparent contradictory result from Deng et al (2016) [63] was observed with the landuse change from farmland to grassland, soil C sequestration change was not significant during 0-10 years, and then it was significantly increased.…”

Section: Land Management and Sommentioning

confidence: 95%

The Increase of Soil Organic Matter Reduces Global Warming, Myth or Reality?

Pedreño¹,

Candel²,

Zorpas³

2020

Preprint

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The soil has lost organic matter in the past centuries. Adding organic matter to soils is one of the management practices applied to recover the levels of soil carbon of the past. Is it a good practice to reduce global warming? In fact, one of the practices promoted to combat climate change is increasing soil organic matter. However, the addition of organic residues to the soil could facilitate the liberation of CO2 and wastes could also have no positive effects on soil properties. In this sense, what it is important is: a) to know which is the expected effect of the organic matter added to the soil; b) how this application alters the soil processes; c) which are the management practices that should be applied; d) how much is the real amount of carbon sequester by the soil and; e) the balance at short and long period after the application of the organic matter. The adequate strategy should be to favour the increment of biologically stabilized soil organic matter considering medium and long time. However, it is necessary to adapt the strategies to the local environmental conditions.

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Carbon Balance of Grasslands on the Qinghai-Tibet Plateau under Future Climate Change: A Review

Cited by 13 publications

References 105 publications

Food and Grain Consumption Per Capita in the Qinghai–Tibet Plateau and Implications for Conservation

Food and Grain Consumption Per Capita in the Qinghai–Tibet Plateau and Implications for Conservation

Assessing the spatial occupation and ecological impact of human activities in Chengguan district, Lhasa city, Tibetan Plateau

The Increase of Soil Organic Matter Reduces Global Warming, Myth or Reality?

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