Ecological risk changes and their relationship with exposed surface fraction in the karst region of southern China from 1990 to 2020

Journal of Environmental Management, Год журнала: 2022, Номер 323, С. 116206 - 116206

Опубликована: Сен. 14, 2022

Язык: Английский

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Spatio-temporal variations in the ecological vulnerability of the Upper Mzingwane sub-catchment of Zimbabwe

Geomatics Natural Hazards and Risk, Год журнала: 2023, Номер 14(1)

Опубликована: Март 24, 2023

Profiling eco-environmentally vulnerable (EV) areas can contribute to the development of mechanisms for environmental protection and sustainable management ecological resources. Land cover change, population density, annual precipitation, mean temperature, remotely sensed indices, actual evapotranspiration, land surface temperature (LST), runoff catchment 1990, 2000, 2011, 2020 were used assess spatiotemporal vulnerability. Spatial principal component analysis (SPCA) was thematic vulnerability each year. The analytical hierarchical process (AHP) then determine weighting maps produce final maps. Our results showed that most sub-basin had low moderate in 2020, with combined proportion these being 80.6%, 55.45%, 83.92%, 85.1%, respectively. classified as high decreased steadily over investigated years, except where an increase observed. Most southern parts moderately vulnerable, while values recorded northern areas. Upper Mzingwane basin are drier less populated than parts. spatial architecture presented will help inform decision makers mitigation planning overall disaster risk initiatives basin.

Язык: Английский

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Comprehensive Evaluation of Island Habitat Quality Based on the Invest Model and Terrain Diversity: A Case Study of Haitan Island, China

Sustainability, Год журнала: 2023, Номер 15(14), С. 11293 - 11293

Опубликована: Июль 20, 2023

The assessment of habitat quality is instrumental in preserving regional species diversity and ecosystem health, thereby forming the theoretical foundation for sustainable urban development. While Invest model a commonly employed tool evaluation, it fails to consider terrain. This study, centered on Haitan Island, introduces terrain index rectify model’s lack evaluation. index, encompassing indices slope, undulation, humidity, combined with model, was applied comprehensive study area’s quality. Furthermore, distribution characteristics China, were examined using Moran’s I LISA indices. research indicates that forest land primary cover type blue-green space comprising forests, farmland, water bodies, grassland, making up 66.8% island’s area, thus implying positive overall ecological base. Habitat within area displays spatial heterogeneity, regions superior primarily found northeast areas such as Junshan. Compared standalone method considering vegetation types yields more sensitive impact evaluation improves precision identifying by 56.7%. Spatial autocorrelation analysis revealed exhibited clustered distribution. Hotspots mainly identified like Junshan western mangrove wetland, high concentration values, while low-value clusters mostly central city southwestern plains. offers novel methodology compensating traditional neglect factors, enriching island It can provide fresh approaches references future habitat-related studies.

Язык: Английский

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From ecological entities to the entire coastal zone: An improved ecological risk assessment methodology in Jiangsu, China

Environmental Impact Assessment Review, Год журнала: 2025, Номер 112, С. 107826 - 107826

Опубликована: Янв. 18, 2025

Язык: Английский

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Early warning level identification and evolutionary trend prediction of ecological risk in the upper Chang Jiang (Yangtze R.), China

Frontiers of Earth Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 24, 2025

Язык: Английский

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Landscape ecological risk assessment of the northern coastal region of China based on the improved ESRISK framework: A case study of Cangzhou City

Ecological Indicators, Год журнала: 2025, Номер 171, С. 113222 - 113222

Опубликована: Фев. 1, 2025

Язык: Английский

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Landscape Ecological Risk and Drivers of Land-Use Transition under the Perspective of Differences in Topographic Gradient

Land, Год журнала: 2024, Номер 13(6), С. 876 - 876

Опубликована: Июнь 18, 2024

Human activities have caused different degrees of land-use change on topographic gradients, with impacts the landscape and ecosystem. Effectively preventing addressing ecological risk (ER) achieving harmonious coexistence between humans nature are important aspects sustainable development. In this study, we used Gansu Province as an example, adopted five periods data in 1980, 1990, 2000, 2010 2020, geoinformatic Tupu method terrain distribution index to study changes under then constructed assessment (LERA) model based pattern analyze (LER) spatiotemporal finally explored LER driving factors using geodetector model. The results showed that (1) dominant types were unused land grassland, accounting for approximately 74% land. situation transferring changing each type was more drastic. cropland built-up easily found low gradient areas elevations small slopes; woodland, grassland water high large slopes. (2) (LERI) 0.018, 0.019, 0.019 0.020, respectively, spatial expressions northwest southeast. Low concentrated reserves; human interference natural environmental complex areas. (3) Natural mainly acted moderate position gradients; socioeconomic gradients. interacted than alone LER. This can provide a scientific basis ensuring security development topography geomorphology.

Язык: Английский

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Effects of habitat loss on migratory shorebird community structure at stopover sites: A case study in the Yellow River Delta, China

Frontiers in Marine Science, Год журнала: 2022, Номер 9

Опубликована: Дек. 1, 2022

Coastal wetlands in China provide important stopover sites for migratory shorebird species. The loss of natural caused by land reclamation over the past few decades poses a major threat to populations. Although habitat at key has been shown lead reductions populations, effects specific on populations remain unclear. Here, we used diversity indices and landscape metrics elucidate long-term (19952020) change community structure Yellow River Delta, which is an site shorebirds along Sea coast. results showed that area, largest patch index, mean aggregation index decreased 25 years. By contrast, number patches density increased same period. richness, Shannon-Wiener Pielou Simpson from 1995 2020, while abundance declined 90.14%. Declines species were more pronounced larger-bodied ones than smaller-bodied (T=1.156, df=42, p=0.02). On other hand, there no significant differences decline threatened non-threatened (T=-0.483, p=0.632) coastal specialist generalist/inland (T=-1.197, p=0.239). decrease area significantly contributed reduction (N=6, p=0.01), its (T=-2.113, p=0.04). These suggest Delta declines are sensitive Existing urgent need conservation, further this region should be avoided. In addition, development conservation plans requires consideration variation responses different functional groups change.

Язык: Английский

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Long-term reclamation of tidal flats of Chongming Island and ecological security of Yangtze estuary, China

Regional Environmental Change, Год журнала: 2024, Номер 24(2)

Опубликована: Май 10, 2024

Язык: Английский

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Construction of Wetland Ecological Security Pattern in Wuhan Metropolitan Core Area Considering Wetland Ecological Risk

Land, Год журнала: 2024, Номер 13(9), С. 1407 - 1407

Опубликована: Сен. 1, 2024

Wetlands play a crucial role in maintaining biodiversity and ecological balance. Preserving the security of wetlands is critically important for regional environmental protection sustainable development. However, core area Wuhan metropolitan circle, which rapidly urbanizing, its are more susceptible to external natural risks, such as changes temperature rainfall, well risks human activity, social economic activities, urban expansion, land use changes, population growth. Meanwhile, internal vulnerability terms their spatial extent, structure, functions also exacerbates risks. These factors collectively influence formation development wetland This study aims comprehensively assess circle by combining hazards vulnerabilities construct optimize wetlands’ pattern. We used MSPA method identify potential sources. Additionally, MCR model was employed integrate risk assessment results into resistance surface, corridors nodes, pattern propose specific optimization strategies. In total, 31 primary 106 secondary sources were selected, along with 20 42 nodes. Furthermore, 10 major constructed. Considering landscape characteristics southern Yangtze River region will center around Liangzi Lake group establish corridor network, promoting overall restoration connectivity. northern form chain-like distribution river, creating diverse ecosystems. provides theoretical foundation constructing optimizing wetlands, laying solid groundwork conservation

Язык: Английский

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