Mapping Watershed-Level Ecosystem Service Bundles in the Pearl River Delta, China

Since the beginning of the 21st century, urbanization has brought about dramatic changes in population, life, and economy, while having a significant impact on the distribution of ecosystem service. As research on the relationship between urbanization and ecosystem service has gradually specified, we decided to explore it at different scales. In this paper, we quantified and mapped the spatial–temporal evolution and relationship between urbanization and ecosystem service value in the Pearl River Delta Urban Agglomeration from 2000 to 2019 based on a dual-scale perspective of county and 3 km × 3 km raster. Our results show that the overall trend of urbanization level and ecosystem service value was increasing. Urbanization and ecosystem service value at the county scale showed a negative spatial correlation, while it was not significant at the raster scale. The “high–high” agglomeration was more concentrated, while the other three “low–low”, “low–high” and “high–low” agglomerations were more dispersed. Our findings suggest it is crucial to identify the key factors of small urban areas to grasp the development mechanism in the urbanization process and maintain the balance of the ecosystem.

Download Full-text

An Effective Method for Wetland Park Health Assessment: a Case Study of the Guangdong Xinhui National Wetland Park in the Pearl River Delta, China

Wetlands ◽

10.1007/s13157-021-01418-5 ◽

2021 ◽

Vol 41 (4) ◽

Author(s):

Xiao-Shan Fang ◽

Shuang Liu ◽

Wei-Zhi Chen ◽

Ren-Zhi Wu

Keyword(s):

Health Status ◽

Pearl River Delta ◽

High Sensitivity ◽

Indicator System ◽

Holistic Health ◽

River Delta ◽

Pearl River ◽

Landscape Indicators ◽

The Pearl River Delta ◽

The Pearl River

AbstractThe Guangdong Xinhui National Wetland Park (GXNWP) in the Pearl River Delta is an important stopover for migratory birds in China and East Asia. Due to high levels of interference, high sensitivity and fragile environmental constraints, an efficient method to assess the health status of wetland parks such as the GXNWP is urgently needed for sustainable development. In this study, we proposed a habitat-landscape-service (HLS) conceptual model that can be used at the site scale to evaluate health status in terms of habitats, landscapes and services by considering the complex ecosystem of wetland parks. This HLS model included 28 evaluation indicators, and the indicator weights and health-grade divisions were based on expert scores using both the analytic hierarchy process (AHP) and fuzzy comprehension evaluation (FCE) methods. The results showed that the health status of the GXNWP was at the “subhealthy” level, with a membership function of 0.4643. This study found that habitat indicators (0.5715) were the key factors affecting the GXNWP health status, followed by service indicators (0.2856) and landscape indicators (0.1429). The HLS-AHP-FCE method provides a holistic health evaluation indicator system and diagnostic approach for rapidly developing wetland parks in the Pearl River Delta, China.

Download Full-text

Source apportionment of fine secondary inorganic aerosol over the Pearl River Delta region using a hybrid method

Atmospheric Pollution Research ◽

10.1016/j.apr.2021.101061 ◽

2021 ◽

pp. 101061

Author(s):

Wanying Chen ◽

Yiang Chen ◽

Yeqi Huang ◽

Xingcheng Lu ◽

Jian Zhen Yu ◽

...

Keyword(s):

Source Apportionment ◽

Hybrid Method ◽

Pearl River Delta ◽

River Delta ◽

Pearl River ◽

Pearl River Delta Region ◽

Delta Region ◽

The Pearl River Delta ◽

Inorganic Aerosol ◽

The Pearl River

Download Full-text

Pollution evaluation and children’s multimedia exposure of atmospheric arsenic deposition in the Pearl River Delta, China

The Science of The Total Environment ◽

10.1016/j.scitotenv.2021.147629 ◽

2021 ◽

pp. 147629

Author(s):

Lyumeng Ye ◽

Buqing Zhong ◽

Minjuan Huang ◽

Weihua Chen ◽

Xuemei Wang

Keyword(s):

Pearl River Delta ◽

River Delta ◽

Pearl River ◽

The Pearl River Delta ◽

The Pearl River ◽

Pollution Evaluation

Download Full-text

Population Characteristics of Brachionus calyciflorus and Their Potential Application for Evaluating River Health in the Pearl River Delta, China

Water ◽

10.3390/w13060749 ◽

2021 ◽

Vol 13 (6) ◽

pp. 749

Author(s):

Yuan Gao ◽

Zini Lai ◽

Chao Wang ◽

Haiyan Li ◽

Yongzhan Mai

Keyword(s):

Water Quality ◽

Environmental Factors ◽

Pearl River Delta ◽

Significant Positive Correlation ◽

River Delta ◽

Population Characteristics ◽

Pearl River ◽

River Health ◽

The Pearl River Delta ◽

The Pearl River

Water pollution can be monitored through the use of indicator species, including Brachionus calyciflorus. To do this, it is necessary to understand the species’ population ecology. Four surveys of zooplankton were conducted in May, August, and December 2018 and February 2019 in the Pearl River Delta, China, to examine the population characteristics of B. calyciflorus. The temporal and spatial distribution of abundance, biomass, dominance, and occurrence frequency were compared with those from 2012 to investigate the relationship between changes in the population of B. calyciflorus and environmental factors. The average abundance, dominance, and occurrence of B. calyciflorus in this survey were significantly higher than those of 2012 in all seasons. Principal component analysis showed that environmental factors such as the temperature, transparency, total nitrogen, and total phosphorus of water had a major impact on the abundance of B. calyciflorus. There was a significant positive correlation with transparency, total nitrogen, and total phosphorus of water, and a very significant positive correlation with water temperature. Overall, these results demonstrated that the distribution characteristics of B. calyciflorus can reflect pollution in water bodies and can be used to evaluate water quality. These research results provide a reference for evaluating China’s river health and can help to manage water quality in the Pearl River Delta.

Download Full-text