Influence of the ecosystem conversion process on the carbon and water cycles in different regions of China

Chen, Wei; Li, Guangchao; Wang, Dongliang; Yang, Zhen; Wang, Zhe; Zhang, Xuepeng; Peng, Bo; Bi, Pengshuai; Zhang, Fengjiao

doi:10.1016/j.ecolind.2023.110040

Cited by 7 publications

(3 citation statements)

References 63 publications

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“…P n−max represents the maximum photosynthetic potential of plants [32,33] and α represents the photosynthetic capacity of plants at low CO 2 concentrations. The CO 2 response curve reflects the feedback mechanism of plant photosynthesis with respect to CO 2 concentration [34,35]. The correlation between P n−max , α, and environmental factors showed that light and temperature were positively correlated with P n and α in the growing season, indicating that light and temperature were the main environmental factors affecting photosynthetic capacity in A. ordosica.…”

Section: Effects Of Environmental Factors On Plant Photosynthesismentioning

confidence: 99%

Response of Leaf Photosynthesis–Transpiration Coupling to Biotic and Abiotic Factors in the Typical Desert Shrub Artemisia ordosica

et al. 2023

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The environmental regulatory mechanism underlying the coupling of leaf photosynthesis and transpiration in Artemisia ordosica, a typical desert shrub in China, remains unclear. To understand this mechanism, we measured the net leaf photosynthetic rate (Pn), transpiration rate (E), and stomatal conductance (gs) from May to October 2019 using a portable photosynthesis analyser. Photosynthetically active radiation, air temperature, relative humidity, and soil water content were simultaneously measured. Both E and Pn are positively correlated with gs. Pn and E exhibited a nonlinear quadratic correlation from May to July and a linear correlation in August and September. The changes in the maximum photosynthetic (Pn−max) and carboxylation rates were mainly affected by air temperature and light. Seasonally, Pn−max initially exhibited an increasing trend, peaking in June and then decreasing. Under low temperature and light conditions, Pn−E was linearly correlated and the coupling relationship was stable. Under higher temperatures and radiation, Pn−E exhibited a nonlinear quadratic correlation, and decoupling occurred with increasing temperature and light intensity. The results of this study provide a better understanding of the responses of desert shrub ecosystems to climate change.

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Section: Effects Of Environmental Factors On Plant Photosynthesismentioning

confidence: 99%

Response of Leaf Photosynthesis–Transpiration Coupling to Biotic and Abiotic Factors in the Typical Desert Shrub Artemisia ordosica

et al. 2023

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“…Meanwhile, both grassland ecosystems were lower than the average carbon density of grassland ecosystems in Qinghai Province (18,080 g•m −2 ) [48] and higher than the carbon density of temperate steppe (5940 g•m −2 ) and temperate desert (2370 g•m −2 ) ecosystem in Ningxia [9]. This may be due to geographic differences in the hydrothermal conditions, ecology, grassland composition, and soil types [49].…”

Section: Carbon Density Of Temperate Steppe and Temperate Desert Ecos...mentioning

confidence: 99%

Distribution Characteristics of Carbon Density in Plant–Soil System of Temperate Steppe and Temperate Desert in the Longzhong Loess Plateau

Li,

He,

Liu

et al. 2024

Agriculture

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Grassland, as a key component of the carbon cycle in terrestrial ecosystems, is vital in confronting global climate change. Characterising the carbon density of grassland ecosystems in the Longzhong Loess Plateau is important for accurately assessing the contribution of grasslands to global climate change and achieving the goal of “peak carbon” and “carbon neutral”. In this study, the Longzhong Loess Plateau was used as the research object to explore changes in the plant–soil system carbon density in two grassland types by analysing the aboveground vegetation biomass carbon density, belowground vegetation biomass carbon density, 0–100 cm soil carbon density, and ecosystem carbon density of temperate steppe and temperate desert. The results showed that the vegetation biomass (standing and living, litter, and belowground biomass), soil, and ecosystem carbon densities of the temperate steppe were significantly higher than those of the temperate desert (p < 0.05). Their carbon densities were 700.51, 7612.95, and 8313.45 g·m−2, respectively. The vertical distribution of belowground biomass and soil carbon density in the temperate steppe was significantly higher than that in the temperate desert. The overall trend of belowground biomass carbon density in the temperate steppe and temperate desert showed a gradual decrease, whereas soil carbon density showed a steady increase. More than 91% and 96% of the carbon was stored in soil in the temperate steppe and temperate desert, respectively, and the belowground biomass carbon stock accounted for more than 84% of the total biomass carbon pools in both temperate steppe and temperate desert. Temperate steppe has a significant effect in improving the carbon stock of grassland ecosystems, so ecological protection and restoration of grassland should be strengthened in the future to enhance the capacity of grassland to sequester carbon and increase sinks.

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“…However, it is essential to acknowledge that the Loess Plateau region has been implementing the Grain for Green program since 1999, resulting in large areas of plantation forests. These plantation forests may face substantial challenges in adapting to future climate conditions, necessitating a thoughtful reassessment of forest management strategies [54,55]. With further warming, drought stress in the Loess Plateau region is expected to increase and potentially subject forests to unprecedented drought stress [41,56].…”

Section: Response Of Tree Radial Growth To Climatementioning

confidence: 99%

Climatic Warming-Induced Drought Stress Has Resulted in the Transition of Tree Growth Sensitivity from Temperature to Precipitation in the Loess Plateau of China

Zhang,

Fu,

Guo

et al. 2023

Biology

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Ongoing climate warming poses significant threats to forest ecosystems, particularly in drylands. Here, we assess the intricate responses of tree growth to climate change across two warming phases (1910–1940 and 1970–2000) of the 20th century in the Loess Plateau of China. To achieve this, we analyzed a dataset encompassing 53 ring-width chronologies extracted from 13 diverse tree species, enabling us to discern and characterize the prevailing trends in tree growth over these warming phases. The difference in the primary contributors over two warming phases was compared to investigate the association of tree growth with climatic drivers. We found that the first warming phase exerted a stimulating effect on tree growth, with climate warming correlating to heightened growth rates. However, a contrasting pattern emerged in the second phase as accelerated drought conditions emerged as a predominant limiting factor, dampening tree growth rates. The response of tree growth to climate changed markedly during the two warming phases. Initially, temperature assumed a dominant role in driving the tree growth of growth season during the first warming phase. Instead, precipitation and drought stress became the main factors affecting tree growth in the second phase. This drought stress manifested predominantly during the early and late growing seasons. Our findings confirm the discernible transition of warming-induced tree growth in water-limited regions and highlight the vulnerability of dryland forests to the escalating dual challenges of heightened warming and drying. If the warming trend continues unabated in the Loess Plateau, further deterioration in tree growth and heightened mortality rates are foreseeable outcomes. Some adaptive forest managements should be encouraged to sustain the integrity and resilience of these vital ecosystems in the Loess Plateau and similar regions.

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Influence of the ecosystem conversion process on the carbon and water cycles in different regions of China

Cited by 7 publications

References 63 publications

Response of Leaf Photosynthesis–Transpiration Coupling to Biotic and Abiotic Factors in the Typical Desert Shrub Artemisia ordosica

Response of Leaf Photosynthesis–Transpiration Coupling to Biotic and Abiotic Factors in the Typical Desert Shrub Artemisia ordosica

Distribution Characteristics of Carbon Density in Plant–Soil System of Temperate Steppe and Temperate Desert in the Longzhong Loess Plateau

Climatic Warming-Induced Drought Stress Has Resulted in the Transition of Tree Growth Sensitivity from Temperature to Precipitation in the Loess Plateau of China

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