Rapid and large changes in coastal wetland structure in China's four major river deltas

© 2023 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 29(2023), 8 vom: 22. Apr., Seite 2286-2300
1. Verfasser: Wang, Xinxin (VerfasserIn)
Weitere Verfasser: Xiao, Xiangming, Zhang, Xi, Wu, Jihua, Li, Bo
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article Spartina alterniflora China's major river deltas coastal wetland structure patch number patch size plant invasion protected area
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520 |a Coastal wetlands provide essential ecosystem goods and services but are extremely vulnerable to sea-level rise, extreme climate, and human activities, especially the coastal wetlands in large river deltas, which are regarded as "natural recorders" of changes in estuarine environments. In addition to the area (loss or gain) and quality (degradation or improvement) of coastal wetlands, the information on coastal wetland structure (e.g., patch size and number) are also major metrics for coastal restoration and biodiversity protection, but remain very limited in China's four major river deltas. In this study, we quantified the spatial-temporal dynamics of total area (TA) and patch number (PN) of coastal wetlands with different sizes in the four deltas and the protected areas (PAs) and assessed the effects of major driving factors during 1984-2020. We also investigated the effectiveness of PAs through the comparison of TA and PN of coastal wetlands before and after the years in which PAs were listed as Ramsar Sites. We found both TA and PN experienced substantial losses in the Liaohe River Delta and Yellow River Delta but recent recoveries in the Yangtze River Delta. The coastal wetlands had a relatively stable and variable trend in TA but had a continually increasing trend in PN in the Pearl River Delta. Furthermore, reduced coastal reclamation, ecological restoration projects, and rapid expansion of invasive plants had great impacts on the coastal wetland structure in various ways. We also found that PAs were effective in halting the decreasing trends in coastal wetland areas and slowing the expansion of reclamation, but the success of PAs is being counteracted by soaring exotic plant invasions. Our findings provide vital information for the government and the public to address increasing challenges of coastal restoration, management, and sustainability in large river deltas 
650 4 |a Journal Article 
650 4 |a Spartina alterniflora 
650 4 |a China's major river deltas 
650 4 |a coastal wetland structure 
650 4 |a patch number 
650 4 |a patch size 
650 4 |a plant invasion 
650 4 |a protected area 
700 1 |a Xiao, Xiangming  |e verfasserin  |4 aut 
700 1 |a Zhang, Xi  |e verfasserin  |4 aut 
700 1 |a Wu, Jihua  |e verfasserin  |4 aut 
700 1 |a Li, Bo  |e verfasserin  |4 aut 
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