Quantifying the contributions of climatic and human factors to vegetation net primary productivity dynamics in East Africa DOI Creative Commons

Minghui Xu,

Zhenke Zhang, Yue Wang

et al.

Frontiers in Forests and Global Change, Journal Year: 2024, Volume and Issue: 6

Published: Jan. 5, 2024

As an important part of the terrestrial ecosystem, vegetation dynamics are subject to impacts from both climate change and human activities. Clarifying driving mechanisms variation is great significance for regional ecological protection achieving sustainable development goals. Here, net primary productivity (NPP) was used investigate spatiotemporal variability 2000 2020 in East Africa, its correlations with factors. Furthermore, we utilized partial derivatives analysis set up different scenarios distinguish relative contributions climatic factors NPP changes. The results revealed that exhibited a significant increase 4.16 g C/m 2 /a upward trend detected across 71.06% study area. average precipitation, temperature, solar radiation inter-annual variations Africa were 2.02, −1.09, 0.31 gC⋅m –2 ⋅a –1 , respectively. Precipitation made greatest positive contribution among all factors, while temperature strong negative contributions. activities changes 1.24 2.34 Moreover, rate larger than change, role decrease findings can provide new evidence deeper understanding ecosystem stability carbon cycling as well reference decision-making scientific support environmental protection.

Language: Английский

Prediction of Potential Suitable Areas and Priority Protection for Cupressus gigantea on the Tibetan Plateau DOI Creative Commons
Huayong Zhang,

Yanan Wei,

Junjie Yue

et al.

Plants, Journal Year: 2024, Volume and Issue: 13(6), P. 896 - 896

Published: March 20, 2024

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Citations

12
Future changes and driving factors of global peak vegetation growth based on CMIP6 simulations DOI
Hongfen Teng, Songchao Chen, Bifeng Hu

et al.

Ecological Informatics, Journal Year: 2023, Volume and Issue: 75, P. 102031 - 102031

Published: Feb. 22, 2023

Language: Английский

Citations

20
Critical role of water conditions in the responses of autumn phenology of marsh wetlands to climate change on the Tibetan Plateau DOI
Xiangjin Shen, Miaogen Shen, Chaoyang Wu

et al.

Global Change Biology, Journal Year: 2023, Volume and Issue: 30(1)

Published: Dec. 12, 2023

Abstract The Tibetan Plateau, housing 20% of China's wetlands, plays a vital role in the regional carbon cycle. Examining phenological dynamics wetland vegetation response to climate change is crucial for understanding its impact on ecosystem. Despite this importance, specific effects phenology region remain uncertain. In study, we investigated influence end growing season (EOS) marsh across utilizing satellite‐derived Normalized Difference Vegetation Index (NDVI) data and observational data. We observed that regionally averaged EOS Plateau was significantly ( p < .05) delayed by 4.10 days/decade from 2001 2020. Warming preseason temperatures were found be primary driver behind delay vegetation, whereas cumulative precipitation showed no significant impact. Interestingly, responses varied spatially plateau, indicating regulatory hydrological conditions phenology. humid cold central regions, daytime warming EOS. However, areas with lower soil moisture exhibited weaker or reversed effect, suggesting complex interplays between temperature, moisture, Notably, arid southwestern regions increased rainfall directly EOS, while higher advanced it. Our results emphasize critical conditions, specifically shaping different regions. findings underscore need incorporate factors into terrestrial ecosystem models, particularly dry accurate predictions change. This informed conservation management strategies face current future challenges.

Language: Английский

Citations

20
Contrasting responses of peak vegetation growth to asymmetric warming: Evidences from FLUXNET and satellite observations DOI
Ying Liu, Chaoyang Wu, Xiaoyue Wang

et al.

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(8), P. 2363 - 2379

Published: Jan. 25, 2023

The peak growth of plant in summer is an important indicator the capacity terrestrial ecosystem productivity, and ongoing studies have shown its responses to climate warming as represented mean temperature. However, impacts from asymmetrical warming, that is, different rates changes daytime (Tmax ) nighttime (Tmin were mostly ignored. Using 60 flux sites (674 site-year total) measurements satellite observations two independent platforms (Global Inventory Monitoring Modeling Studies [1982-2015]; MODIS [2000-2020]) over Northern Hemisphere (≥30°N), here we show growth, by both flux-based maximum primary productivity greenness indices (maximum normalized difference vegetation index enhanced index), responded oppositely warming. Tmax-Tmin+ (peak showed negative Tmax , but positive Tmin dominated most ecosystems types, especially water-limited ecosystems, while Tmax+Tmin- was primarily observed high latitude regions. These contrasting could be explained strong association between asymmetric water conditions, including soil moisture, evapotranspiration/potential evapotranspiration, vapor pressure deficit. Our results are therefore understanding change, consequently a better representation future models differentiating contributions

Language: Английский

Citations

19
Spatiotemporal dynamics of net primary productivity and its influencing factors in the middle reaches of the Yellow River from 2000 to 2020 DOI Creative Commons

Wenxi Xuan,

Liangyi Rao

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 14

Published: Jan. 27, 2023

Net primary productivity (NPP) is an important indicator used to characterize the of terrestrial ecosystems. The spatial distribution and dynamic change in NPP are closely related regional climate, vegetation growth human activities. Studying spatiotemporal dynamics its influencing factors plays a vital role understanding ecosystem carbon sink capacity.Based on MODIS-NPP data, meteorological land use data from 2000 2020, we analyzed variation characteristics middle reaches Yellow River (MRYR) by using unary linear regression analysis, third-order partial correlation Sen+Mann-Kendall trend analysis.The results showed that annual average MRYR was 319.24 gCm-2a-1 with spatially decreasing southern part northern part. From experienced fluctuating upward at rate 2.83 gCm-2a-1, area significant accounted for 87.68%. different types differed greatly, which forest had greatest increase NPP. Temperature negative most parts MRYR. Water vapor pressure promoted accumulation northwestern areas positive between water 87.6%, 20.43% passed significance test P< 0.05.The study highlight impact climate land-use changes provide theoretical guidance high-quality sustainable development

Language: Английский

Citations

18
Quantifying the contributions of climate factors and human activities to variations of net primary productivity in China from 2000 to 2020 DOI Creative Commons
Zijian Li, Jiangping Chen, Zhanpeng Chen

et al.

Frontiers in Earth Science, Journal Year: 2023, Volume and Issue: 11

Published: Feb. 24, 2023

Net primary productivity (NPP) plays a vital role in the globe carbon cycle. Quantitative assessment of effects climate changes and human activities on net dynamics is for understanding driving mechanisms vegetation change sustainable development ecosystems. This study investigates contributions climatic factors to China from 2000 2020 based residual trend analysis (RESTREND) method. The results showed that annual average was 325.11 g C/m 2 /year significantly increasing ( p &lt;0.05) at rate 2.32 /year. increased across 40.90% over period, while only 1.79% declining &lt;0.05). increase were 1.169 1.142 /year, respectively. Climate contributed positively mainly Sichuan Basin, Loess Plateau, Mongolian Northeast Plain. Positive occurred Central China, Greater Khingan Mountains. varied among sub-regions. In Tropical Monsoon Region Subtropical Region, had greater impacts than factors, dominant factor recovery other addition, during 2000–2020, dominated by both 49.84% areas solely accounted 13.67% 10.92%, Compared changed land cover types, total as well mostly unchanged which more 90%.

Language: Английский

Citations

18
Quantitative analysis of the impact of climate change and oasification on changes in net primary productivity variation in mid-Tianshan Mountains from 2001 to 2020 DOI Creative Commons
G. Y. Hou,

Shixin Wu,

Weiyi Long

et al.

Ecological Indicators, Journal Year: 2023, Volume and Issue: 154, P. 110820 - 110820

Published: Aug. 21, 2023

Net primary productivity (NPP) has been substantially changed under the intense oasification in urban agglomerations on northern slopes of mid-Tianshan Mountain (UANSTM) and climate change. However, temporal variations NPP remain unclear, relative contribution change annual variation is still debate. By using remote sensing data, reanalysis modified Carnegie–Ames-Stanford Approach (CASA) model, a machine learning method, we explored spatial–temporal UANSTM region quantified to from 2001 2020. Our study indicated that: (1) presents an overall increasing trend most presented decreasing mainly due cropland conversion area; (2) oasification-dominated area concentrated built-up land cropland; (3) during 2001–2020, increased by about 5.4 Tg·C, climatic increase were (73.1% 26.9%, respectively); (4) water-related factors was main driver region.

Language: Английский

Citations

18
Potential Effects of Climate Change on Agricultural Water Resources in Riyadh Region, Saudi Arabia DOI Open Access
Mustafa El-Rawy, Heba Fathi, Wouter Zijl

et al.

Sustainability, Journal Year: 2023, Volume and Issue: 15(12), P. 9513 - 9513

Published: June 13, 2023

The water supply in Saudi Arabia is already depleted. Climate change will exacerbate the demand for these resources. This paper examines how climate affects demands of Arabia’s most important food crops: wheat, clover, vegetables, and dates. To reduce adverse impacts on crops’ productivity, as well their irrigation requirements (IWR), a number adaptation techniques were investigated. study was carried out Ar Riyadh region, Arabia, with cultivated area 179,730 ha. In this study, five models from Coupled Model Intercomparison Project Phase 6 (CMIP6) two Shared Socio-economic Pathways (SSPs), SSP2-4.5 SSP5-8.5, used to forecast investigate potential agricultural resources Al-Riyadh Region Arabia. simulate IWRs under present projected scenarios, CROPWAT8.0 used. results showed that maximum increase ratio 2100 respectively, be 4.46% 12.11% higher than current case (2020). temperatures increased by 12.11%, compared (2020), supporting past research Arabian Peninsula revealed both short- long-term temperature increases are anticipated considerable. Under ETo found 2.18% 6.35% 2100, respectively. Given evapotranspiration closely mirrors behavior region June August, our data suggest crop may mid long term. findings indicate Riyadh, capital commercial hub, require more irrigate land because expanding trend. growth requirement (GIWR) 3.1% 6.7% areas dates, maize, citrus, tomato, potato, other vegetables decrease 6.56%, 7.17%, 5.90%, 6.43%, 5.47%, 6.99%, 5.21%, 5.5%, 2100. Conversely, SSP2-4.5, 3.10%, 3.67%, 2.35%, 3.83%, 2.32%, 4.18%, 1.72%, 2.38% could aid clarifying GIWR Riyad, improving resource management planning.

Language: Английский

Citations

17
Monitoring the spatiotemporal change of Dongting Lake wetland by integrating Landsat and MODIS images, from 2001 to 2020 DOI
Dizhou Guo, Wenzhong Shi,

Fangrui Qian

et al.

Ecological Informatics, Journal Year: 2022, Volume and Issue: 72, P. 101848 - 101848

Published: Oct. 8, 2022

Language: Английский

Citations

23
Spatial and temporal variation of NDVI and its driving factors based on geographical detector: A case study of Guanzhong plain urban agglomeration DOI
Zixuan Yan, Zhanbin Li, Peng Li

et al.

Remote Sensing Applications Society and Environment, Journal Year: 2023, Volume and Issue: 32, P. 101030 - 101030

Published: July 18, 2023

Language: Английский

Citations

16