Formation and evolution mechanism of ecological security pattern in Southwest China

Guohua, 刘国华 Liu

doi:10.5846/stxb201611212364

Cited by 8 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a global biodiversity hotspot, Southwest China has abundant natural resources and an essential ecosystem service and plays a critical role in maintaining the ecological security and sustainable socio-economic development of China, and even Southeast Asia [30]. However, continuous climate warming and intense human activities have caused significant changes in landscape patterns and ecosystem degradation in Southwest China, severely affecting regional sustainable development [30][31][32]. Therefore, taking Southwest China as a study area, we analyzed the regional land-use structure and change intensity.…”

Section: Introductionmentioning

confidence: 99%

Temporal and Spatial Changes of Habitat Quality and Their Potential Driving Factors in Southwest China

Bao

et al. 2023

Land

View full text Add to dashboard Cite

Climate change and human activities have considerably changed the spatial patterns and functional elements of regional habitats. Understanding spatiotemporal changes in habitat quality (HQ) and their potential driving factors is essential for maintaining ecosystem health and protecting biodiversity. To explore the effect of physical and human factors on HQ changes in Southwest China, we firstly analyzed the land-use change intensity (LCI). We then evaluated spatiotemporal changes in HQ based on the InVEST model and explored the spatial heterogeneity of the main driving factors of HQ changes based on a geographical detector and a geographical weighted regression model. The results showed that LCI had obvious spatiotemporal differences, and LCI from low-quality habitat to high-quality habitat (LCI1) was significantly higher than that from high-quality habitat to low-quality habitat (LCI2). The HQ improved steadily in Southwest China in 1990–2015, showing a trend of low–high–low from southeast to northwest. Moreover, there were twelve factors, including aboveground biomass, ecological land area ratio, population density, slope, etc., which had a significant impact on the spatial differences in HQ, and the effects of different factors on HQ had observable spatial heterogeneity. The effect of LCI2 on the spatial difference of HQ was greater than that of LCI1. These results suggested that the current ecosystem protection and management policy had a positive effect on improving HQ. Our study provides an important decision-making reference for sustainable land development and utilization and regional ecological protection and restoration.

show abstract

Section: Introductionmentioning

confidence: 99%

Temporal and Spatial Changes of Habitat Quality and Their Potential Driving Factors in Southwest China

Bao

et al. 2023

Land

View full text Add to dashboard Cite

show abstract

“…The government of China proposed controlling KRD as an important part of ecological reconstruction in the ‘Outline of National Medium‐ and Long‐Term Science and Technology Development Plan (2006–2020)’ and has since approved and implemented a series of ecological restoration projects, such as the Grain to Green Program, the Public Welfare Forest Protection, and the Karst Rocky Desertification Restoration Project (Liao et al, 2018). Karst ecosystems are very fragile, the easy erosion of damaged soil exposes bedrock and threatens local environmental safety (Liu, 2016; Yuan, 2001; Yuan & Jia, 2011). Karst ecosystem variations can be evaluated using ecological indicators.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, KRD is a critical threat to karst ecosystem sustainability (Wang et al, 2016;Zeng et al, 2018) (Liao et al, 2018). Karst ecosystems are very fragile, the easy erosion of damaged soil exposes bedrock and threatens local environmental safety (Liu, 2016;Yuan, 2001;Yuan & Jia, 2011). Karst ecosystem variations can be evaluated using ecological indicators.…”

mentioning

confidence: 99%

Dynamic assessment of restored ecosystem health based on pressure‐state‐response subsystem‐system model in a karst trough valley

Qiong,

Yongjun,

Yina

et al. 2023

Ecohydrology

View full text Add to dashboard Cite

Limited soil and water resources in a sloping karst trough valley have negatively affected the local population and ecosystem health. A deeper understanding of karst ecosystem health and its driving mechanism are important for ecosystem management and restoration. In recent decades, the karst trough valley has been exposed to multiple threats from various natural and anthropogenic factors. Assessment of which is essential to understand the state of the karst ecosystem and to develop a suitable, scientifically proven management strategy. Based on the pressure‐state‐response‐subsystem‐system (PSR‐SS) model, the restored ecosystem health of karst trough valley was assessed from 2000 to 2015 at the grid scale. The principal component analysis (PCA) method was adopted to explore the factors driving ecosystem health change. It is found that from the years of 2000 to 2015, there was an improvement in ecosystem health in karst trough valley ecosystem. Land use analysis maps indicate a slight decrease in woodland and grassland and increase in cropland and urban buildup, and the Land coverage increased from 84.87% to 87.64%. The area of karst rock desertification decreased by 75.3 km2 from 2000 to 2015. The AEH indices of 0.27 (2000), 0.45 (2005), 0.46 (2010) and 0.68 (2015), which indicate moderate warning, pre‐warning, early warning and generally healthy, respectively. The 17 selected driving factors were grouped into two broad categories by PCA, one is national policy, and the other one is natural condition and local activities. National policy was to be found the most important influence on ecosystem health. Our findings emphasize the key role of government in ecosystem health change, which would give directions to the sustainable development of karst trough valley areas.

show abstract

“…Therefore, some development space remains within the existing quantitative research for the examination of water resource accessibility, and the quantitative methods need to be further improved.Southwest China is the source and upstream of many rivers, and is also an important ecological barrier zone. It plays a key role in maintaining the ecological and socio-economic security of East China, South China, and even Southeast Asia [35]. The region has abundant rainfall and a large amount of water resources.…”

mentioning

confidence: 99%

“…Southwest China is the source and upstream of many rivers, and is also an important ecological barrier zone. It plays a key role in maintaining the ecological and socio-economic security of East China, South China, and even Southeast Asia [35]. The region has abundant rainfall and a large amount of water resources.…”

mentioning

confidence: 99%

Evaluating Water Resource Accessibility in Southwest China

Qiu

Mao

et al. 2019

Water

View full text Add to dashboard Cite

The accessibility, quantity, and quality of water resources are the basic requirements for guaranteeing water resource security. Research into regional water resource accessibility will contribute to improving regional water resource security and effective water resource management. In this study, we used a water resource accessibility index model considering five spatial factors to evaluate the grid-scale water resource accessibility and constructed the spatial pattern of water resource accessibility in Southwest China. Then, we analyzed the coupling coordination degree between county-level water resource accessibility and eco-socio-economic water demand elements. The water resource accessibility showed obvious regional differences, and the overall trend gradually decreased from Southeast to Northwest. The coupling coordination degree between county-level water resource accessibility and eco-socio-economic water demand elements was between 0.26 and 0.84, and was relatively low overall, whereas the counties (districts) with high coordination, moderate coordination, low coordination, reluctant coordination, and incoordination accounted for 0.92%, 5.31%, 21.06%, 59.71%, and 13.00% of total counties (districts), respectively. Therefore, the Southwest region needs to further strengthen the construction of its agricultural irrigation facilities, protect the water resources, and coordinate the relationship between water resource management and water demand elements to comprehensively guarantee regional sustainable development.

show abstract

Formation and evolution mechanism of ecological security pattern in Southwest China

Cited by 8 publications

References 0 publications

Temporal and Spatial Changes of Habitat Quality and Their Potential Driving Factors in Southwest China

Temporal and Spatial Changes of Habitat Quality and Their Potential Driving Factors in Southwest China

Dynamic assessment of restored ecosystem health based on pressure‐state‐response subsystem‐system model in a karst trough valley

Evaluating Water Resource Accessibility in Southwest China

Contact Info

Product

Resources

About