Evaluation of Coastal Ecological Security Barrier Functions Based on Ecosystem Services: A Case Study of Fujian Province, China

Fang Luo, Li He (), Zhengwei He, Wanting Zeng and Yuanchao Wang
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Fang Luo: Key Laboratory of Coupling Process and Effect of Natural Resources Elements, Beijing 100055, China
Li He: Key Laboratory of Coupling Process and Effect of Natural Resources Elements, Beijing 100055, China
Zhengwei He: College of Geography and Planning, Chengdu University of Technology, Chengdu 610059, China
Wanting Zeng: College of Geography and Planning, Chengdu University of Technology, Chengdu 610059, China
Yuanchao Wang: Key Laboratory of Coupling Process and Effect of Natural Resources Elements, Beijing 100055, China

Sustainability, 2024, vol. 16, issue 16, 1-23

Abstract: Constructing coastal ecological security barriers is beneficial for preventing environmental degradation and enhancing resilience to natural disasters. This study examines the functionality of these barriers from an ecosystem service perspective, developing an Ecosystem Security Barrier Function (ESBF) index to analyze its spatiotemporal variations. From 2000 to 2020, habitat quality in the study area experienced a slight decline, while water supply capacity initially increased and then decreased. Water purification capacity hit its lowest point in 2015 before improving. The ESBF generally ranged from moderate to high levels, with higher values in the northwest and lower values in the southeast, showing strong spatial autocorrelations. Despite mild degradation in some areas, overall stability was maintained with frequent transitions between ESBF levels. Utilizing the Multiscale Geographically Weighted Regression (MGWR) model, we conducted a grid-scale analysis of the driving mechanisms behind ESBF. We found that precipitation, elevation, and the Normalized Difference Vegetation Index (NDVI) positively correlated with ESBF, whereas population density, land use, and nighttime lights negatively correlated. The relationship between temperature and ESBF showed a “north-positive, south-negative” pattern. The study recommends enhancing coastal wetland restoration, strengthening protective forest construction, and effectively controlling pollutant sources entering the sea to safeguard and improve the ecological security barrier function.

Keywords: ecological safety barrier; driving mechanisms; evaluation pattern; coastal area; ecosystem service (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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