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3 results on '"Haofan Yun"'

1. Study on suitability assessment of waterbird habitats along the Bohai Rim

Author

Zhimei Huang, Yalan Lu, Weiqing Meng, Xunqiang Mo, Wenbin Xu, Haofan Yun, Mengxuan He, and Yidong Wang

Subjects
Bohai Rim, Waterbirds, MaxEnt model, Driving factors, Potential suitable habitat, Ecology, QH540-549.5
Abstract

In recent years, due to rapid economic development, the Bohai Rim has become a focus of attention. The area has abundant waterbird resources, however, the coastal wetlands in the Bohai Rim are currently under serious threat and waterbird conservation needs to be addressed urgently. Exploring the changes and main driving factors of waterbirds and conducting habitat suitability assessments for waterbirds are of great significance to regional ecology and environmental protection efforts. In this study, during the period of 2002–2021, we recorded the waterbird numbers and species in the Bohai Rim region of China. Then, we quantified the potential suitable habitats and analyzed the driving factors for waterbirds using the MaxEnt model. The results showed that the waterbird richness around the Bohai Rim increased gradually over a 20-year period, and more waterbird species were detected in wetland habitats than in other habitats. Five waterbird hotspot regions require special attention, including the Yellow River Delta Nature Reserve, Beidagang Wetland, Beidaihe National Wetland Park, Liaohe Estuary wetland and Caofeidian Wetland Park. The main driving factors of waterbird changes are the NDVI, land cover and maximum temperature in the warmest month. This study provides a reference and theoretical support for waterbird conservation and rational habitat use.

Published
2023
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2. Temporal-spatial change of China's coastal ecosystems health and driving factors analysis

Author

Wenbin, Xu, Mengxuan, He, Weiqing, Meng, Ying, Zhang, Haofan, Yun, Yalan, Lu, Zhimei, Huang, Xunqiang, Mo, Beibei, Hu, Baiqiao, Liu, and Hongyuan, Li

Subjects
China, Conservation of Natural Resources, Environmental Engineering, Rivers, Humans, Environmental Chemistry, Estuaries, Factor Analysis, Statistical, Pollution, Waste Management and Disposal, Ecosystem
Abstract

Understanding the spatial distribution pattern change and driving factors behind ecosystem health is essential to ecosystem management and restoration. However, in the research of regional ecosystem health, there is little research on ecosystem health in coastal regions, and there is little exploration of its temporal and spatial pattern change and its driving factors. In this study, we use the Vigor-Organization-Resilience-Services (VORS) model and marine ecosystem health index to diagnose the ecosystem health of the whole coastal area of China over the last 20 years, and find the main contributing factors affecting ecosystem health with the help of geographic detectors and geographic weighted regression analysis. Our results show that: (1) the ecosystem health level in the south of the coastal region is higher than that in the north, mainly with 30° north latitude as the main dividing line. (2) The regions with high change rate are mainly concentrated in Bohai Bay, the Yangtze River Estuary, Hangzhou Bay and the Pearl River Estuary, and the change is mainly negative. (3) Both natural and human factors have an impact on ecosystem health, and the influencing factors are different on different scales. The interaction between different factors is greater than the impact of a single factor on ecosystem health. The study puts forward a new evaluation framework for the study of ecosystem health in coastal areas, which can be applied to other coastal areas with similar conditions, and can help the sustainable and healthy development of coastal areas.

Published
2022

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