Tracing climatic and human disturbance in diverse vegetation zones in China: Over 20 years of NDVI observations

Ecological Indicators, Journal Year: 2023, Volume and Issue: 156, P. 111170 - 111170

Published: Oct. 31, 2023

Over the past two decades (2000–2021), China has experienced a significant increase in vegetation cover. However, intricate spatial and temporal variations cover, arising from interaction of climate change human activities, remain enigmatic, particularly across diverse zones. This research endeavors to unravel dynamics cover using MOD13A1 Normalized Difference Vegetation Index (NDVI) dataset, delving into China's seven distinct zones (VZ1-VZ7). employs residual analysis, relative geo-detector techniques investigate drivers NDVI variation heterogeneity The findings reveal compelling upward trajectory NDVI, predicted during 2000–2021 period. Notably, extremely increases are discernible approximately 53.90%, 50.13%, 23.29% respectively. Among zones, VZ3 displays highest rates, yet proportion with VZ1 surpasses other analysis underscores as predominant catalyst for enhancement, although an exception is noted VZ3. Furthermore, primarily influenced by interactions between land use types humidity, sunshine duration, precipitation, especially humidity types. Significant changes can lead marked alterations structure function terrestrial ecosystems, while patterns at regional level also alter type which together exert impact on NDVI. These results accentuate importance formulating tailored ecosystem management strategies characteristics each zone ensure sustainable development ecosystems China.

Language: Английский

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Spatio-temporal pattern and driving factors of tourism ecological security in Fujian Province

Ecological Indicators, Journal Year: 2023, Volume and Issue: 157, P. 111255 - 111255

Published: Nov. 21, 2023

The scientific assessment of tourism ecological security holds significant theoretical and practical importance in promoting the sustainable development economy environment region. This study focuses on 84 counties within Fujian Province as its research scope. By utilizing DPSIR model integrating remote sensing index (RSEI), we have established an evaluation system for assessing was quantitatively determined using SBM-DEA model. Subsequently, a combination methods, including spatial autocorrelation, exploratory regression analysis, GWR model, employed to explore temporal evolution patterns, well driving factors affecting from 2010 2019. findings reveal following insights: (1) Overall, level is low, with decreasing disparity across different regions. mainly falls "unsafe" "relatively unsafe" categories; however, regions higher levels are exhibiting expanding trend. Moreover, each county improving, Southern Central outperforming other (2) Notably, there correlation among Province, indicating pronounced agglomeration characteristics. (3) Key drivers contributing spatial–temporal disparities encompass tourist-related disturbances, income local farmers herders, tourism-generated income, government interventions. Among these factors, increased proactive intervention positive impact security, whereas tourist disturbances exert negative influence. Additionally, factor displays noticeable heterogeneity.

Language: Английский

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Spatiotemporal evolution and influencing factors of provincial tourism ecological security in China

Ecological Indicators, Journal Year: 2023, Volume and Issue: 148, P. 110114 - 110114

Published: March 10, 2023

The scientific evaluation of tourism ecological security (TES) is vital for promoting sustainable development and environmental protection. Using the Driver–Pressure–State–Impact–Response model, this study constructed a theoretical framework evaluating TES. An improved Technique Order Preference by Similarity to Ideal Solution method, spatial autocorrelation, standard deviational ellipse center gravity Geographically Temporally Weighted Regression model were used evaluate provincial TES level, spatiotemporal pattern evolution trajectory, key influencing factors in China. results showed that (1) over period, China’s level increased, overall was at critical level. Among six geographical units, average decreased as follows: Central South China > East Southwest North Northwest Northeast (2) correlation area positive. local autocorrelation positive (high-high) southeast Heihe–Tengchong Line, northwest side “low–low” correlation. shrunk inward years, moved from northeast southwest. (3) affected are ranked follows order importance: sulfur dioxide emissions, number star-rated hotels, natural population growth rate, international revenue, days on which air quality equal or above Grade II, domestic sewage discharge, rate tertiary industry. This suggests measures such strengthening governance protection, coordinating human–nature relationships, adopting differentiated development, improving impact can improve

Language: Английский

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A new multivariate index for ecological security assessment in the China-Myanmar border region

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 364, P. 121447 - 121447

Published: June 12, 2024

The coordination of development efforts and ecological conservation in China's border regions is a significant challenge due to the overlap biodiversity hotspots, ecologically fragile zones, impoverished areas. Achieving harmonious integration preservation economic relies on fundamental assessment security (ES). However, comprehensive assessments ES remain limited. This study introduces new index, multivariate index (MESI), which integrates ecosystem vigor, organization, elasticity, services risk. Here, MESI was utilized assess temporal spatial changes its associated impact factors China-Myanmar region (CMBR) from 2000 2020. provides clear representation actual status CMBR, exhibiting correlation with eco-environmental quality (EEQI; p < 0.01). exhibited notable heterogeneity consisting primarily both relatively safe levels, accounted for approximately 85% total area. From 2020, CMBR experienced gradual improvement status, area experiencing an increase level accounting 23.41% area, exceeded proportion decrease (4.71%). combined multiple exerted greater influence than did individual alone. Notably, human increasingly influenced during period. results this provide valuable insights sustainable management can be extended other regions.

Language: Английский

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An integrated ecological security early-warning framework in the national nature reserve based on the gray model

Journal for Nature Conservation, Journal Year: 2023, Volume and Issue: 73, P. 126394 - 126394

Published: March 21, 2023

Nature reserves (NRs) play a pivotal role in minimizing habitat loss and protecting wild animals plants, which are critical for human ecological security. However, focusing only on the construction of security patterns NRs without understanding their early-warning situations driving factors may fail to achieve protection goals. This study constructed an framework index system based Driving force-Pressure-State-Impact-Response (DPSIR) model. The gray model (GM) was used predict situation, Geo-detector applied explore Baishuijiang National Reserve (BNNR). results showed that average (ESI) value increased from 0.2796 2005 0.3171 2017, with increase 11.82%. (ESEWI) 2018 0.3622 2030, 12.46%. These indicated situation continually improved 2030. By number towns "no warning" grade four, "extreme zero, proportion areas early-warnings decreased 100% 33%. q values per capita forest land grassland were both 0.9334, environmental characteristic primary early-warning. Our demonstrated DPSIR grey can well prediction provide scientific support management NRs.

Language: Английский

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Ecological Security Patterns Research Based on Ecosystem Services and Circuit Theory in Southwest China

Sustainability, Journal Year: 2024, Volume and Issue: 16(7), P. 2835 - 2835

Published: March 28, 2024

The rapid economic development in the Chengdu–Chongqing Economic Circle (CCEC) has exerted significant pressure on ecological environment of Sichuan–Chongqing Region China. Balancing protection and become an imperative challenge that needs to be addressed. In this study, we employed land use/cover data environmental threat factors construct Ecological Security Patterns (ESPs) for CCEC using InVEST model Circuit Theory. research findings revealed following key outcomes: (1) total area suitable habitat was 208,728.3 km2, accounting 87.14% study area. Habitat quality exhibited regional variations, with higher habitats predominantly found western northeastern parts, lower central region. (2) consisted areas low, medium, high, optimal quality, spanning 140,912.18 15,341.89 15,578.38 36,895.85 respectively. These accounted 58.83%, 6.40%, 6.50%, 15.40% area, (3) ESPs encompassed 22 nodes, 36 clusters corridors, 136 sources. corridors served as radial connections, linking each node source along mountain ranges, forested areas, river networks, valleys. (4) core regions forming included Qionglai–Minshan–Longquan Mountains west, Tiefeng–Fangdou–Qiyue–Wushan east northeast, Dalou Mountain southeast. regional-scale provide valuable insights policymakers implement targeted measures promote green development. They offer objective guidance constraints managing urban expansion anthropogenic activities, ultimately enhancing security level CCEC.

Language: Английский

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Towards an integrated systematic approach for ecological maintenance: Case studies from China and Russia

Ecological Indicators, Journal Year: 2022, Volume and Issue: 140, P. 108982 - 108982

Published: May 25, 2022

The world's ecological security has been significantly threatened because of the rapid growth urbanization. Recently, worldwide studies maintenance and have become crucial scientific value as it ensures balance between human needs resources. In this paper, status Pingtan Island, Songming County (China), Yoshkar-Ola (Russia) was studied from perspective environment quality pattern. remote sensing-based index (RSEI) used to study quality, geographic detector analyze impact six factors on RSEI. random forest algorithm classify land use sensing images, an pattern constructed based minimum cumulative resistance (MCR) model. results show that overall Island is moderate, which accounts for 32.46% total area. explanatory power dryness factor, most influential factor environmental increased by 3.90% during five years, corridor 8.67 km. accounted 33.66% area with moderate maintenance. affects changed into greenness its decreased 3.59%, 57.95 28.47% biggest affecting 2.69% five-year period, length 10.64 GIS methods were integrate inland coastal areas different natural zones conduct a comparative three case studies, can provide decision-making support regional planning contribute global sustainable development.

Language: Английский

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Heterogeneity and optimization of ecological security pattern on a mountain town: A case of Tianzhu County in the Hexi Corridor, China

Frontiers in Environmental Science, Journal Year: 2023, Volume and Issue: 10

Published: Jan. 10, 2023

As a primary concern in the ecosystem, understanding impact of spatial heterogeneity ecological networks on development environmental sustainability has overarching significance. The Tibetan Plateau’s edge is vital contribution to study plateau’s network. However, there are few studies and explorations county-level network arid region. This aimed evaluate patterns Tianzhu County establish an security evaluation index system. We used minimum cumulative resistance (MCR) model built surface from exploratory data analysis (ESDA) method. Then, by identifying corridors nodes gravity model, we analyzed pattern proposed specific plans for optimizing situation. results showed that 1) county overall been lower, its values each direction, 2) Z-Score was 70.1893, which shows vulnerability region significant autocorrelation. identified 156 112 nodes, formed “one belt three zones.” Our analytical framework offers valuable tool constructing selecting “sources” at regional scale, can be applied landscapes geographical contexts sustainable regions.

Language: Английский

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Construction of Nature Reserves’ Ecological Security Pattern Based on Landscape Ecological Risk Assessment: A Case Study of Garze Tibetan Autonomous Prefecture, China

Sustainability, Journal Year: 2023, Volume and Issue: 15(11), P. 8707 - 8707

Published: May 28, 2023

Human activities are constantly affecting ecological space, and the construction of security patterns to ensure has become an issue that must be considered for sustainable development. At present, little attention been paid cities with a high number nature reserves. In this study, we took Garze Tibetan Autonomous Prefecture in China, which many reserves, as research object construct pattern reserves sources. Firstly, Fragstats 4.2 ArcGIS 10.4 were used obtain risk evaluation results study area landscape. Secondly, “nature–society–landscape” resistance factor system surface constructed using minimum model. Finally, safety zone reserve was divided, established. (1) The shows spatial distribution “low northwest southeast”, low moderate-low dominating; (2) formed consisting 9 sources, 35 nodes, 8 corridors total length 702.96 km 4 zones; (3) divided into four categories: low, medium, moderate-high zones, accounting 20.62%, 27.34%, 24.48% 27.55%, respectively. This provides new framework urban offers scientific guidance conservation management ecology.

Language: Английский

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Study on the Spatial–Temporal Pattern and Driving Mechanism of Tourism Eco-Security in the Yellow River Basin

International Journal of Environmental Research and Public Health, Journal Year: 2023, Volume and Issue: 20(4), P. 3562 - 3562

Published: Feb. 17, 2023

Tourism eco-security evaluation is an effective tool for facilitating the coordinated and sustainable economic environmental development of tourist destinations. Based on system theory, this study established a comprehensive index DPSIR model, applying entropy–TOPSIS method, spatial autocorrelation, econometric model geo-detector to investigate temporal evolution drivers tourism Yellow River basin. The results showed that basin steadily significantly increased from 2003 2020, reaching peak in 2019, while there was low level overall improvement possibility. show pattern expansion provincial capital cities nearby prefecture-level middle lower reaches upper reaches, with significant clustering spillover effects. Factors affecting vary between regional basins. Because are many influencing factors, key factors were further identified by effect decomposition. have important theoretical practical value promoting economy ecological environment

Language: Английский

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