Relationship between Urban Forest Fragmentation and Urban Shrinkage in China Differentiated by Moisture and Altitude DOI Open Access

Jingchuan Zhou,

Weidong Man, Mingyue Liu

et al.

Forests, Journal Year: 2024, Volume and Issue: 15(9), P. 1522 - 1522

Published: Aug. 29, 2024

Forest fragmentation and urban shrinkage have become the focus of attention in global ecological conservation, with goal achieving sustainable development. However, few studies been concerned forest patterns shrinking cities. It is necessary to explore whether loss population will mitigate degradation. Thus, this study, 195 cities were identified based on demographic datasets characterize spatiotemporal forests China against a depopulation background. To illustrate explicit spatial evolution China, we reclassified land-use products determined annual variations from 2000 2022 using area-weighted centroids landscape pattern indexes. The effects different climatic topographical conditions discussed. results demonstrated that coverage rate increased 40.05 40.47% generally southwestern orientation, most frequent decrease appeared 2010 2015. Except for temperate humid sub-humid Northeast plains hills, all geographical sub-regions exhibited growing forests. Relatively stable movement direction dynamics dramatic area changes large observed. at lower elevation more fluctuating direction. slightly fragmented, weakened condition was via decelerating fragmentation. warm-temperate, humid, North basin regions variations. Therefore, it emphasized monitoring policy implementation essential due time lag national policies cities, especially within low-altitude regions. This research concludes mitigation deforestation greatly varied according moisture altitude sheds light density new perspective, providing support management improvements quality residents’ lives.

Language: Английский

Using a Light Gradient-Boosting Machine–Shapley Additive Explanations Model to Evaluate the Correlation Between Urban Blue–Green Space Landscape Spatial Patterns and Carbon Sequestration DOI Creative Commons
Yuting Wu,

Mengya Luo,

Shaogang Ding

et al.

Land, Journal Year: 2024, Volume and Issue: 13(11), P. 1965 - 1965

Published: Nov. 20, 2024

Global ecosystems are facing challenges posed by warming and excessive carbon emissions. Urban areas significantly contribute to emissions, highlighting the urgent need improve their ability sequester carbon. While prior studies have primarily examined sequestration benefits of single green or blue spaces, combined impact urban blue–green spaces (UBGSs) on remains underexplored. Meanwhile, rise machine learning provides new possibilities for assessing this nonlinear relationship. We conducted a study in Yangzhou area, collecting Landsat remote sensing data net primary productivity (NPP) at five-year intervals from 2001 2021. applied LightGBM-SHAP model systematically analyze correlation between UBGSs NPP, extracting key landscape metrics. The results indicated that metrics had varying impacts NPP. At patch type level, Percentage Landscape was positively correlated with NPP space, while contiguity index fractal dimension favored under certain conditions. contribution space lower, some indicators exhibiting negative correlations. contagion aggregation UBGS positive effects division shape were negatively enhance understanding relationship sequestration, provide reference planning.

Language: Английский

Citations

1
Annually Spatial Pattern Dynamics of Forest Types under a Rapid Expansion of Impervious Surfaces: A Case Study of Hangzhou City DOI Open Access
Zhu Yuxin,

Jingchuan Zhou,

Mingyue Liu

et al.

Forests, Journal Year: 2023, Volume and Issue: 15(1), P. 44 - 44

Published: Dec. 24, 2023

Dramatic forest dynamics strongly influence pressure mitigation from the increasing population and climate changes of an urban landscape. Effectively monitoring landscapes in a spatiotemporally consistent manner, satellite remote sensing has emerged as first analytical tool to help us understand forests. At present, most studies focus on classification algorithms, spatial analysis methods, ecosystem models, literature lacks explicit research responses different types forests urbanization. Thus, this study, Hangzhou was selected typical metropolitan area determine annual patterns at forest-type level. To illustrate pattern resulting rapid urbanization, study characterized Landsat-based types, well their 2000 2022 using object-based backdating classification, land-use transfer matrix, area-weighted centroids, landscape indexes. The spatiotemporal effects impervious surface expansion type scale were discussed. results demonstrated that forests, mainly located southwest, decreased 11,660.69 11,516.15 km2. Moreover, evergreen broadleaved occupied largest had ratio among three over 23 years, followed by needle-leaved deciduous In total, 103.37 km2 areas transformed surfaces, with highest transformation occurring widely across City lowest Forests lost adjacency due development City, while southwestward shrinkage slowed down increase degree fragmentation. Therefore, measures city planning according deep adjustments administrative divisions suitability should be implemented, such green ecological corridor construction. This provides methodology explicit-scale perspective for better understanding under high-speed

Language: Английский

Citations

2
Effect of thinning intensity on the carbon sequestration of natural mixed coniferous and broadleaf forests in Xiaoxing’an Mountains, China DOI Creative Commons
Hangfeng Qu, Xibin Dong, Hui Liu

et al.

Journal of Forestry Research, Journal Year: 2024, Volume and Issue: 35(1)

Published: July 30, 2024

Abstract To study the effect of thinning intensity on carbon sequestration by natural mixed coniferous and broadleaf forests in Xiaoxing’an Mountains, China, we established six 100 m × experimental plots Dongfanghong Forest that varied intensity: plot A (10%), B (15%), C (20%), D (25%), E (30%), F (35%), control sample area (0%). principal component analysis was performed using 50 different variables, including species diversity, soil fertility, litter characteristics, canopy structure parameters, seedling regeneration parameters. The effects were strongest (0.75), followed (0.63), (0.50), (0.48), (0.22), (0.11), (0.06). composite score highest, indicating at a 30%. These findings provide useful insights could aid management China. This information has implications for future studies these forests, methods used ecological assessments

Language: Английский

Citations

0
Relationship between Urban Forest Fragmentation and Urban Shrinkage in China Differentiated by Moisture and Altitude DOI Open Access

Jingchuan Zhou,

Weidong Man, Mingyue Liu

et al.

Forests, Journal Year: 2024, Volume and Issue: 15(9), P. 1522 - 1522

Published: Aug. 29, 2024

Forest fragmentation and urban shrinkage have become the focus of attention in global ecological conservation, with goal achieving sustainable development. However, few studies been concerned forest patterns shrinking cities. It is necessary to explore whether loss population will mitigate degradation. Thus, this study, 195 cities were identified based on demographic datasets characterize spatiotemporal forests China against a depopulation background. To illustrate explicit spatial evolution China, we reclassified land-use products determined annual variations from 2000 2022 using area-weighted centroids landscape pattern indexes. The effects different climatic topographical conditions discussed. results demonstrated that coverage rate increased 40.05 40.47% generally southwestern orientation, most frequent decrease appeared 2010 2015. Except for temperate humid sub-humid Northeast plains hills, all geographical sub-regions exhibited growing forests. Relatively stable movement direction dynamics dramatic area changes large observed. at lower elevation more fluctuating direction. slightly fragmented, weakened condition was via decelerating fragmentation. warm-temperate, humid, North basin regions variations. Therefore, it emphasized monitoring policy implementation essential due time lag national policies cities, especially within low-altitude regions. This research concludes mitigation deforestation greatly varied according moisture altitude sheds light density new perspective, providing support management improvements quality residents’ lives.

Language: Английский

Citations

0