How Did the Mild and Humid Areas of China Turn Green? A Case Study on Chongqing DOI Open Access

Yiting Zuo,

Jie Cheng, Hongjie Zhang

et al.

Forests, Journal Year: 2022, Volume and Issue: 13(8), P. 1257 - 1257

Published: Aug. 9, 2022

Since the implementation of Natural Forest Resources Protection Project (NFRP) and Grain for Green Program (GFGP), two key ecological projects related to forestry, vegetation cover in Chongqing, has improved significantly. Existing studies have revealed effects climate change human activity on arid regions. However, more are needed reveal influence drivers mild humid areas, quantify relative contribution analyze overall land use characteristics different In this study, we used Theil–Sen slope analysis Mann–Kendall test investigate spatial temporal changes Chongqing. Further, Pearson correlation correlations between drivers, quantitatively analyzing contributions these drivers. Complex network model was regions obtain their land-use system characteristics, Hurst index adopted predict future vegetation-cover changes. The results study showed that average Chongqing increased significantly from 2000 2020, greening trend most obvious winter. Precipitation temperature influenced city a certain extent, positive precipitation significant than with temperature. terms factor, areas were mainly concentrated central southern parts which could be higher part city. Under combined activity, 71.95% total area. Human had 70.39% 69.14% where decreased increased, respectively. complex woodlands grasslands contributed exhibited an increasing trend. future, it is estimated 72.92% will exhibit degradation This helps us further understand providing new research directions informing forestry-related policies.

Language: Английский

Spatio-temporal evolution characteristics of carbon emissions from road transportation in the mainland of China from 2006 to 2021 DOI
Lanyi Zhang,

Dawei Weng,

Yinuo Xu

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 917, P. 170430 - 170430

Published: Jan. 27, 2024

Language: Английский

Citations

27

A Forest Fire Susceptibility Modeling Approach Based on Light Gradient Boosting Machine Algorithm DOI Creative Commons
Yanyan Sun, Fuquan Zhang, Haifeng Lin

et al.

Remote Sensing, Journal Year: 2022, Volume and Issue: 14(17), P. 4362 - 4362

Published: Sept. 2, 2022

A forest fire susceptibility map generated with the model is basis of prevention resource allocation. more reliable helps improve effectiveness Thus, further improving prediction accuracy always goal modeling. This paper developed a based on an ensemble learning method, namely light gradient boosting machine (LightGBM), to produce accurate map. In modeling, subtropical national park in Jiangsu province China was used as case study area. We collected and selected eight variables from occurrence driving factors for modeling correlation analysis. These are topographic factors, climatic human activity vegetation factors. For comparative analysis, another two popular methods, logistic regression (LR) random (RF) were also applied construct models. The results show that temperature main factor produced map, extremely high areas classified by LR, RF, LightGBM 5.82%, 18.61%, 19%, respectively. F1-score higher than LR RF LightGBM, 88.8%, 84.8%, 82.6%, area under curve (AUC) them 0.935, 0.918, 0.868, introduced method shows better ability performance evaluation metrics.

Language: Английский

Citations

30

Impact of Climate Change on Food Security in Kazakhstan DOI Creative Commons
Danmeng Wang, Ruolan Li,

Guoxi Gao

et al.

Agriculture, Journal Year: 2022, Volume and Issue: 12(8), P. 1087 - 1087

Published: July 23, 2022

Global food production faces immense pressure, much of which can be attributed to climate change. A detailed evaluation the impact change on yield staple crops in Kazakhstan, a major exporter, is required for more scientific planting management. In this study, Mann–Kendall test and Theil–Sen Median slope were used determine trends yields over past 30 years; random forest was analyze importance monthly climatic factors; states classified according factors through systematic clustering method; lastly, influence analyzed using panel regression models. The upward trend wind speed potato throughout Kazakhstan apparent. Furthermore, barley wheat had increased southeast. We determined that wheat, frostbite should prevented after warmer winters high-latitude areas. Except July–August low-latitude areas, irrigation water provided other growth periods regions. As similar effects reported barley, same preventive measures would apply. For potatoes, tuber rot, caused by frost or excessive precipitation May, areas; soil dryness alleviated during germination seedling stages cooling maintained formation maturation. hot dry air March April could damage crops.

Language: Английский

Citations

21

Chinese Modern Architectural Heritage Resources: Perspectives of Spatial Distribution and Influencing Factors DOI Creative Commons
Y Liao, Jérémy Cenci, Jiazhen Zhang

et al.

ISPRS International Journal of Geo-Information, Journal Year: 2023, Volume and Issue: 12(9), P. 358 - 358

Published: Aug. 31, 2023

Architectural heritage refers to buildings, complexes, and sites with historical, cultural, artistic, technological, geographical values, including ancient historical places of interest, dwellings, industrial sites. China’s 20th-Century Heritage List is a state-level list that includes architecture artistic value in China the 20th century. It carrier past century monument witnessing change human knowledge, culture, technology, even art. This from China, country vast land area, densely populated population, numerous architectural relics. study used ArcGIS analyze 597 cases 6 batches List. Its spatial structure was studied by calculating nearest neighbor index, Gini coefficient, imbalance kernel density. The results showed distribution Chinese modern resources cohesive uneven China. Next, detector model its influencing factors perspective 12 factors. found this type resource condensed. provincial level pattern seven centers one core multiple scattered points. 34 administrative regions extremely uneven, 57.29% being located North East also focused on analyzing five factors, namely, topography, regional status, culture education, social economic development level, external contact. Exploring will not only enable comprehensive understanding context current situation 20th-century heritage, but provide reference for protection sustainable use.

Language: Английский

Citations

12

Vegetation Dynamics and Their Response to Climate Changes and Human Activities: A Case Study in the Hanjiang River Basin, China DOI Open Access
Zizheng Zhang,

Liang Si-Yuan,

Yuqing Xiong

et al.

Forests, Journal Year: 2023, Volume and Issue: 14(3), P. 509 - 509

Published: March 4, 2023

The Hanjiang River Basin (HJRB) is an important water conservation and ecological barrier area for the South–North Water Transfer Central Project. quantitative analysis of regional differences in vegetation changes their main drivers monitoring environment basin formulation protection measures. Based on MODIS13Q1 data from 2000 to 2020, spatiotemporal variation characteristics HJRB were analyzed using Theil–Sen + Mann–Kendall, Hurst index, correlation analysis. Then, we detected optimal parameter geographic detector. results showed that average NDVI value increased 0.651 0.737, with a spatial distribution pattern “high northwest low southeast”, 88.68% study increase cover, while 5.80% significant degradation. positive persistence future stronger than negative. It may show slowdown or degradation trend, among which restoration along Han urbanized areas need be strengthened. factor detector indicated factors influencing change topography climate, most influential variables, respectively, elevation (0.1979), landform (0.1720), slope (0.1647), soil type (0.1094), weaker influence human activity factors. interaction test various enhanced explanatory power mainly nonlinear two-factor enhancements. dominant varies between sub-basins; example, wind speed land use conversion was middle reaches HJRB; lower expressed as temperature. Finally, effects range category different growth systematically analyzed. contribute understanding dynamic based comprehensive consideration topography, activities, taking into account totality variability geographical environment, provide reference rational resources HJRB.

Language: Английский

Citations

11

Detecting Spatiotemporal Dynamics and Driving Patterns in Forest Fragmentation with a Forest Fragmentation Comprehensive Index (FFCI): Taking an Area with Active Forest Cover Change as a Case Study DOI Open Access
Shiyong Zhen,

Qing Zhao,

Shuang Liu

et al.

Forests, Journal Year: 2023, Volume and Issue: 14(6), P. 1135 - 1135

Published: May 31, 2023

Forests play an irreplaceable role in preserving soil and water, as well realizing carbon neutrality. However, logging urban expansion have caused widespread forest fragmentation globally, resulting biodiversity loss emissions. Therefore, it is a prerequisite to develop comprehensive index for evaluating the degree of propose effective policies protection restoration. In this study, (FFCI) was constructed through principal component analysis (PCA) based on land-use data from 2000 2020 Fujian Province, composed five commonly used landscape metrics: patch density (PD), largest (LPI), mean area (MPA), aggregation (AI), division. Then, semivariogram function moving windows method were employed explore scale effect spatiotemporal variations FFCI. The spatial autocorrelation distinguish relationship fragmentation, while driving mechanisms explored using geographic detector (GD). results show that optimal reflect window 3500 m. proposed FFCI could explain more than 85% information all metrics, effectivity validated by urban–rural gradient transect analysis. We also found that, despite having highest coverage China, Province has experienced severe fragmentation. High medium accounted over 50% types with decreasing trends low very increasing high time, indicating study aggravated time. Moreover, distribution pattern mainly high–high clusters low–low clusters, showing trend year year. areas distributed center coastal cities, internal cities western central regions had relatively Additionally, differentiation variation influenced elevation, slope, nighttime light intensity. superimposed impact two factors greater individual factors. These provide approach assessing offer scientific support mitigating

Language: Английский

Citations

11

Identification of forest priority conservation and restoration areas for different SSPs-RCPs scenarios DOI

Miaomiao Liu,

Shuang Liu,

Ruiqian Tang

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 375, P. 124412 - 124412

Published: Feb. 1, 2025

Language: Английский

Citations

0

Unequal Impact of Road Expansion on Regional Ecological Quality DOI Creative Commons

Weiguo Qiu,

Dingyi Jia,

Rongpeng Guo

et al.

Land, Journal Year: 2025, Volume and Issue: 14(3), P. 523 - 523

Published: March 3, 2025

The expansion of road networks profoundly affects ecological systems by intensifying habitat fragmentation, altering hydrological processes, and exacerbating pollution. However, our understanding the multi-scale spatiotemporal coupling between quality remains limited. Thus, taking Fuzhou City in Southeastern China as a case study (~12,000 km2), we apply bivariate spatial autocorrelation, geographical detectors (GDs), geographically weighted regression (MGWR) to explore interactions quality. Results reveal following: (1) From 2016 2021, kernel density estimation (KDE) analysis network indicates coordinated growth both urban rural areas, with an increase 0.759 km/km2. Analysis based on remote sensing-based index (RSEI) shows decrease from 2000 2016, then trend increasing gradually center area. (2) Predominant tradeoff relationships exist KDE RSEI while notable synergistic emerge ΔKDE ΔRSEI. (3) Multi-scale GD identifies principal factor influencing ΔRSEI, MGWR reveals their significant associations at optimal scale 3000 m. These findings highlight unequal impact quality, underscoring pivotal role changes its dynamics. They offer essential insights for sustainable transport planning.

Language: Английский

Citations

0

Spatial–Temporal Variations and the Driving Factors of Vegetation Coverage in the Loess Hilly and Gully Region of China DOI Open Access
Zhifeng Jia,

Rui Lei,

Yu Liu

et al.

Forests, Journal Year: 2023, Volume and Issue: 14(6), P. 1238 - 1238

Published: June 15, 2023

To determine the spatial–temporal variations and factors leading to vegetation recovery in loess hilly gully region of China, this study analyzed a two-decade trend variation cover based on normalized difference index (NDVI) data from 1998 2019 using Sen + MK test Hurst determined driving Geodetector model. The area was high southeast low northwest, with an overall increasing rate 0.0108/year. areas significant improvement accounted for 95.14%, persistent change 37.36%. Annual precipitation is most crucial factor NDVI change, potential evapotranspiration, relative humidity, elevation, land use type, type can also explain local variations. effect compound significantly greater than that single factor. effective are annual precipitation, humidity which varied between 559.4–698.6 mm, 530.6–744.6 59%–62%, 2006–2717 m, respectively. use, vegetation, soil types suitable healthy growth forest, coniferous eluvial soil.

Language: Английский

Citations

9

Insights into forest vegetation changes and landscape fragmentation in Southeastern China: From a perspective of spatial coupling and machine learning DOI Creative Commons
Yuying Lin,

Yidong Jin,

Ge Yang

et al.

Ecological Indicators, Journal Year: 2024, Volume and Issue: 166, P. 112479 - 112479

Published: Aug. 10, 2024

Language: Английский

Citations

3