An early warning signal for grassland degradation on the Qinghai-Tibetan Plateau

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Окт. 12, 2023

Intense grazing may lead to grassland degradation on the Qinghai-Tibetan Plateau, but it is difficult predict where this will occur and quantify it. Based a process-based ecosystem model, we define productivity-based stocking rate threshold that induces extreme assess whether current activity in region sustainable. We find below ~80% of areas, 55% these grasslands exceeds half threshold. According our model projections, positive effects climate change including elevated CO2 can partly offset negative across nearly 70% only areas Our analysis suggests does not exceed 60% (within 50% 70%) balance human demands with protection face change.

Язык: Английский

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Persistent and enhanced carbon sequestration capacity of alpine grasslands on Earth’s Third Pole

Science Advances, Год журнала: 2023, Номер 9(20)

Опубликована: Май 17, 2023

The carbon sequestration capacity of alpine grasslands, composed meadows and steppes, in the Tibetan Plateau has an essential role regulating regional cycle. However, inadequate understanding its spatiotemporal dynamics regulatory mechanisms restricts our ability to determine potential climate change impacts. We assessed spatial temporal patterns net ecosystem exchange (NEE) dioxide Plateau. grasslands ranged from 26.39 79.19 Tg C year-1 had increasing rate 1.14 between 1982 2018. While were relatively strong sinks, semiarid arid steppes nearly neutral. Alpine meadow areas experienced increases mainly because temperatures, while steppe weak due precipitation. Carbon on plateau undergone persistent enhancement under a warmer wetter climate.

Язык: Английский

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Vegetation cover dynamics and its constraint effect on ecosystem services on the Qinghai-Tibet Plateau under ecological restoration projects

Journal of Environmental Management, Год журнала: 2024, Номер 356, С. 120535 - 120535

Опубликована: Март 12, 2024

Язык: Английский

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Resolving controversies surrounding carbon sinks from carbonate weathering

Science China Earth Sciences, Год журнала: 2024, Номер 67(9), С. 2705 - 2717

Опубликована: Авг. 8, 2024

Язык: Английский

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Lake salinization on the Qinghai–Tibetan Plateau alters viral community composition and lifestyles

Communications Earth & Environment, Год журнала: 2025, Номер 6(1)

Опубликована: Янв. 25, 2025

Язык: Английский

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Crop rotation increases Tibetan barley yield and soil quality on the Tibetan Plateau

Nature Food, Год журнала: 2025, Номер unknown

Опубликована: Янв. 28, 2025

Abstract Tibetan barley ( Hordeum vulgare ) accounts for over 70% of the total food production in Plateau. However, continuous cropping causes soil degradation, reduces quality and yield decline. Here we explore benefits crop rotation with wheat rape to improve quality. We conducted 39 field experiments on Plateau, comparing short-term (≤5 years), 5–10 years long-term (≥10 years) or rape. Results showed that barley–wheat barley–rape rotations increased yields by 17% 12%, respectively, while improving index 11% 21%, compared cropping. Both improved consequently yield, mainly increasing microbial biomass nitrogen carbon decreasing pH. By contrast, led decreased organic matter, lower pH, contributing The time. Implementing thus offers a sustainable agricultural strategy security

Язык: Английский

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Microbial nitrogen and phosphorus co‐limitation across permafrost region

Global Change Biology, Год журнала: 2023, Номер 29(14), С. 3910 - 3923

Опубликована: Апрель 25, 2023

The status of plant and microbial nutrient limitation have profound impacts on ecosystem carbon cycle in permafrost areas, which store large amounts experience pronounced climatic warming. Despite the long-term standing paradigm assumes that cold ecosystems primarily nitrogen deficiency, large-scale empirical tests are lacking. Here we assessed potential across Tibetan alpine region, using combination enzymatic elemental stoichiometry, genes abundance fertilization method. In contrast with traditional view, four independent approaches congruently detected widespread phosphorus co-limitation both surface soil deep deposits, stronger topsoil. Further analysis revealed resources stoichiometry community composition were two best predictors magnitude limitation. High ratio available to low fungal/bacterial corresponded strong These findings suggest warming-induced enhancement availability could stimulate activity, probably amplify losses from areas.

Язык: Английский

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Phosphorus supply suppressed microbial necromass but stimulated plant lignin phenols accumulation in soils of alpine grassland on the Tibetan Plateau

Geoderma, Год журнала: 2023, Номер 431, С. 116376 - 116376

Опубликована: Фев. 8, 2023

Increased nitrogen (N) and phosphorus (P) inputs have fundamental effects on the soil organic carbon (SOC) composition dynamics. However, responses of plant- microbial-derived SOC components to N P addition in alpine grasslands are poorly understood. Based a 10-year experiment conducted grassland Tibetan Plateau, we used amino sugars lignin phenols as tracers for microbial necromass plant components, respectively, explored their accumulation with P. We found that + (P supply) decreased necromass, whereas did not significant effect. In comparison, supply increased topsoil, but them subsoil. Among these factors, total played non-negligible role controlling soils. addition, ratios fungi-to-bacteria were observed supply. This implies although change significantly, it may eventually loss potential. Collectively, attempted elucidate underlying mechanisms long-term sequestration, which has important implications microbial-mediated processes context increasing inputs.

Язык: Английский

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Shifts in the trends of vegetation greenness and photosynthesis in different parts of Tibetan Plateau over the past two decades

Agricultural and Forest Meteorology, Год журнала: 2023, Номер 345, С. 109851 - 109851

Опубликована: Дек. 8, 2023

Язык: Английский

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Carbon Emissions From Chinese Inland Waters: Current Progress and Future Challenges

Journal of Geophysical Research Biogeosciences, Год журнала: 2024, Номер 129(2)

Опубликована: Фев. 1, 2024

Abstract Inland waters are significant emitters of greenhouse gases for the atmosphere and play an important role in global carbon cycle. With a vast land area East Asia spanning broad range climatic conditions, China has large number natural human‐made water bodies. These inland systems importance because their high emission fluxes. Over past decades, experienced unprecedented environmental changes driven by rapid economic development, which have profoundly modified its biogeochemistry associated emissions. This review focuses on dioxide (CO 2 ) methane (CH 4 dynamics from China's response to change. Major drivers CO CH emissions, including aquatic metabolism, hydrological factors, prevailing human impacts, examined. To advance our understanding emissions waters, we further identify several critical knowledge gaps, such as inadequate research headwater streams climate‐sensitive Tibetan Plateau ecosystems. Furthermore, insufficient undergoing extensive interventions (e.g., damming, flow regulation, pollution, farming practices aquaculture ponds) is highlighted. We suggest that future efforts should be made better capture spatiotemporal heterogeneity dissolved concentrations fluxes across well long‐term trends. overcome uncertainties sources current flux estimates, mechanistically understand transport transformation Chinese underlying processes particularly needed.

Язык: Английский

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