Journal of Cleaner Production, Год журнала: 2024, Номер 449, С. 141800 - 141800
Опубликована: Март 14, 2024
Язык: Английский
Global Change Biology, Год журнала: 2023, Номер 29(15), С. 4412 - 4429
Опубликована: Июнь 5, 2023
Microbial communities in soils are generally considered to be limited by carbon (C), which could a crucial control for basic soil functions and responses of microbial heterotrophic metabolism climate change. However, global C limitation (MCL) has rarely been estimated is poorly understood. Here, we predicted MCL, defined as availability substrate relative nitrogen and/or phosphorus meet metabolic requirements, based on the thresholds extracellular enzyme activity across 847 sites (2476 observations) representing natural ecosystems. Results showed that only about 22% terrestrial surface show community. This finding challenges conventional hypothesis ubiquitous metabolism. The geographic extent our study was mainly attributed plant litter, rather than organic matter processed microbes, serving dominant source acquisition. We also identified significant latitudinal pattern MCL with larger at mid- high latitudes, whereas this absent tropics. Moreover, significantly constrained rates respiration, suggesting potentially increase respiration latitudes low if change increases primary productivity alleviates higher latitudes. Our provides first estimates advancing understanding cycling feedback under
Язык: Английский
Процитировано
23
International Journal of Digital Earth, Год журнала: 2023, Номер 16(1), С. 2233 - 2258
Опубликована: Июнь 14, 2023
Previous studies have confirmed the time-lagged and cumulative effects of drought anthropogenic activities on vegetation growth, but these focus effect are poorly known how productivity responds to activities. Here, based reconstructed Normalized Difference Vegetation Index, Standardized Precipitation Evapotranspiration Index land use degree comprehensive index, we diagnosed spatiotemporal pattern drought, investigated over China through month where maximum correlation coefficient occurred. It revealed that browning trend 32.21% vegetated lands was covered by overall greening, especially in northwestern China. Drought intensified with a rate 0.0014/year. 66.41% 54.57% had response shorter timescales 1–4 months, indicating higher sensitivity growth drought. There U-shaped relationship between moisture conditions time. 49.9% China's showed activities, longer 6–10 years, demonstrating triggered ecological changes ecosystems cannot keep pace. The accumulated years declined increased intensity.
Язык: Английский
Процитировано
23
The Science of The Total Environment, Год журнала: 2024, Номер 917, С. 170439 - 170439
Опубликована: Янв. 26, 2024
Язык: Английский
Процитировано
11
Earth s Future, Год журнала: 2024, Номер 12(2)
Опубликована: Фев. 1, 2024
Abstract It has been projected that climatic warming will contribute to vegetation productivity variability at the global scale. With a continued warming, what extent and where is most affected by still not adequately quantified. Herein, based on 11 earth system model outputs, we predict characteristics of vegetation‐temperature sensitivity ( S vpt , defined as higher/lower temperature produce more/less vegetation) changes under different CO 2 emission scenarios various types, further assessing relationship socio‐ecosystems. At end 21st century, area proportion with increases >2°C SSP1‐2.6, SSP2‐4.5, SSP3‐7.0, SSP5‐8.5 are 3%, 40%, 97%, 99%, respectively. The largest contribution terrestrial gross primary growth low latitudes. 33%–63% ecosystems show significantly negative trend in indicating weakened promotion effect growth. In particular, 2060, there be clear reversal from carbon sink source SSP3‐7.0 scenario, spatially distributed mainly Amazon rainforest, tropical Africa, southern North America. Precipitation also an important factor affecting change, inverted U‐shaped between them. thresholds higher high scenario when reaches its highest value. Moreover, socio‐demographic pressures places like Central Africa East offset warming; future, these countries should develop appropriate population land management strategies achieve socio‐ecosystems sustainable development.
Язык: Английский
Процитировано
9
Earth s Future, Год журнала: 2024, Номер 12(3)
Опубликована: Фев. 28, 2024
Abstract Global warming has largely advanced spring vegetation phenology, which subsequently affected terrestrial carbon and water cycles. However, further shifts in phenology under future climate change remain unclear. We estimated the start of growing season (SOS) by applying multiple extraction methods based on NDVI3g data set, then parameterized evaluated 11 models that included chilling, forcing, photoperiod. Based scenario from three Shared Socioeconomic Pathways (SSP126, SSP245, SSP585) derived eight models, was predicted using models. Results showed all performed better than NULL model (mean SOS), with performance one‐phase broadly matching two‐phase although best varied type. The spatial pattern simulated SOS similar among it explained >75% variation. mean SOS, we found will continue to advance strong conditions (SSP245 SSP585), but trend reverse at around 2060 SSP126 scenario. continued is likely related rapid forcing fulfillment stronger conditions. moderate warming, chilling might be reduced require longer compensate for higher ultimately would result delay. Our findings highlight trends different conditions, potentially causing widespread impact species interaction, biodiversity, ecosystem function.
Язык: Английский
Процитировано
9
Global Change Biology, Год журнала: 2024, Номер 30(2)
Опубликована: Фев. 1, 2024
Abstract Biodiversity is considered important to the mitigation of global change impacts on ecosystem multifunctionality in terrestrial ecosystems. However, potential mechanisms through which biodiversity maintains under remain unclear. We grew 132 plant communities with two levels diversity, crossed treatments based 10 factors (nitrogen deposition, soil salinity, drought, invasion, simulated grazing, oil pollution, plastics antibiotics heavy metal and pesticide pollution). All negatively impacted multifunctionality, but negative were stronger high compared low diversity communities. explored for this unexpected result, finding that inhibition selection effects (i.e., species associated functioning) contributed sensitivity change. Specifically, decreased abundance novel functional plants legumes) not The also mediated by increased relative fungal pathogens (identified from metabarcoding samples) their relationship plants. Taken together, our experiment highlights importance protecting legumes, managing pathogens, maintenance face complex
Язык: Английский
Процитировано
8
Environmental Research Letters, Год журнала: 2023, Номер 18(10), С. 104002 - 104002
Опубликована: Авг. 31, 2023
Abstract Central Asia is the world’s largest azonal arid region, with strong seasonal precipitation patterns. Vegetation in this region relatively sparse and extremely sensitive to climatic changes. However, long-term trends vegetation are still unclear or even controversially recognized, hindering assessment of climate change’s impact on regional sustainability. Here, we present longest time series index investigated its response seasonality from 1982 2022 by integrating normalized difference data Global Inventory Monitoring Modeling Studies Moderate Resolution Imaging Spectroradiometer. The results indicate a greening trend during 1982–2000 browning 2000–2008. In contrast previous studies, detected rapid 2008–2022, largely resulted continuous warm-wet Asia. addition, spatial variation uncovered within suggesting differences responding contrasting seasonality. Under CMIP6 scenarios, spring wetting summer drying projected prompt Asian change simultaneous south north.
Язык: Английский
Процитировано
20
Ecological Indicators, Год журнала: 2023, Номер 149, С. 110148 - 110148
Опубликована: Март 27, 2023
Drought can significantly affect the carbon cycle of ecosystems. The Qinba Mountains region has a high potential for developing sink forestry due to its strong fixation capacity. This study applied Carnegie-Ames-Stanford approach (CASA) model calculate monthly net primary productivity (NPP) in from 2001 2018. standardized precipitation evapotranspiration indices (SPEI1-12) at various time scales were also analyzed by Thornthwaite method, along with test significance and sustainability (Sen-MK-Hurst) model, examine persistent characteristics dry wet changes Mountains. results correlation analysis between NPP SPEI multiple showed that regional vegetation is impacted drought, most sensitive months being July October. On average, there four-month cumulative effect drought on NPP. About 45.49% 19.99% are extremely or heavily grasses sensitive, followed cultivated plants, deciduous broadleaved forests, mixed sparse shrublands. found 40.99% expected become wetter 14.9% drier future. Understanding response this help management climate change environmental regulation.
Язык: Английский
Процитировано
19
Atmospheric chemistry and physics, Год журнала: 2023, Номер 23(13), С. 7781 - 7798
Опубликована: Июль 14, 2023
Abstract. Intense regional fires are a common occurrence in the context of climate warming and have progressively evolved into one major natural disasters terrestrial ecosystems, posing serious hazard to atmosphere change. We investigated spatial distribution, intensity, emission changes, meteorological differences between different fire-active fire-prone regions globally based on multi-source satellite remote sensing fire data, data order better understand change trend activity at multiple temporal scales. The findings demonstrate that while burned area (BA) has decreased slowly over last 20 years, fraction (BF), count (FC), radiative power (FRP) all exhibit pronounced seasonal variations. physical characteristics fires, including BF, FC, FRP, experience greater variation as latitude increases, with summer autumn being seasons most frequent worldwide. This study also shows emissions declined substantially 2012 2020 northern Canada, Alaska, northeastern China, whereas it notably increased Siberia region during same period, primarily due rise emissions. results classification show difference CO2 produced by among is relatively small. Excluding CO2, aerosol (the total organic carbon (OC), (TC), black (BC)) ranged from 78.6 % 84.2 %, least significant air pollutants PM2.5, SO2, NOx) 5.8 11.7 %. abundance vegetation predominately affects intensity development, weather conditions can indirectly influence incidence altering growth condition vegetation. Correspondingly, increase temperature Northern Hemisphere's middle- high-latitude forest likely cause for emissions, tropical was largely influenced decrease precipitation relative humidity. contributes understanding variations variability provides support control across seasons.
Язык: Английский
Процитировано
19
Land Degradation and Development, Год журнала: 2023, Номер 34(16), С. 5055 - 5070
Опубликована: Июль 16, 2023
Abstract In light of the recent pressure from global warming, extreme drought events, and deleterious human activity, strength long‐term change trends vegetation in karst regions—in terms their resistance to external disturbances—have not been studied systematically. Therefore, herein, we quantified resilience its nonlinear south China under different environmental gradients by measuring lag‐1 autocorrelation time‐series Normalized Difference Vegetation Index (1990–2018), clarifying driving forces changes. It was shown that monotonous. first stage (pre‐2002), precipitation warming promoted increase regional ( slope = −0.045, p < 0.0001). second (during 2002–2010), increasing trend obvious difficult keep up with productivity, indicating time‐lagged effect ecological restoration projects resilience. third (post‐2010), due continuous advancement projects, increased significantly had largest amplitude −0.128, Simultaneously, gradients, showed significant differentiation characteristics. comparison non‐karst regions, increases were more regions especially post‐2010. With soil depth, exhibited an trend, dependence on soil. At slopes >25°, most obviously meadows largest, which can be preferred type for projects. This research provides another perspective understand ecosystem results will facilitate protection ecosystems.
Язык: Английский
Процитировано
18