干旱区生态环境知识资源中心(Arid): Rise and fall of an avian oasis: Tracking the impacts of land use change in a key coastal wetland in the world's largest megalopolis

Arid

DOI	10.1016/j.scitotenv.2023.167231
	Rise and fall of an avian oasis: Tracking the impacts of land use change in a key coastal wetland in the world's largest megalopolis
	Leung, Felix; Doherty, Philip D.; Liu, Mingfeng; Metcalfe, Kristian; Godley, Brendan; Lee, Shing Yip
通讯作者	Leung, F
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	906
英文摘要	Tropical estuaries support wetlands with high biodiversity value and provide essential ecosystem services. Many of these systems, however, are global hotspots for urbanization, particularly in Asia, where this process has resulted in rapid conversion, fragmentation, and degradation of 80 % of the wetlands along the East AsianAustralasian Flyway (EAAF) for migratory birds. However, the impact of such landscape scale changes on migratory birds at a key stopover site along the EAAF has not been evaluated. Here, we used long-term data (> 40 years) from Deep Bay (Hong Kong), a shallow embayment in the Pearl River estuary (PRE) in south China, to investigate the impact of urbanization on (1) catchment land use and water quality, and (2) its impact on the capacity of the wetland to support populations of migratory waterbirds. Deep Bay supports the largest remnants of mangrove forests and tidal mudflats in the PRE and is an important refueling ground along the EAAF. It is also part of the Greater Bay Area (GBA, population 86 million), the world's largest megalopolis. The principal component analysis highlighted the nutrient loading and cleansing effect from seasonal flushing as characterizing variation in water quality in Deep Bay over four decades. Major shifts in water quality during the study period were accompanied by contemporaneous changes in wintering waterbirds numbers. Prior to 2003, the main drivers of water quality were organic nutrients from animal husbandry. Following large-scale reclamation and increases in impervious surface cover post-2003, primarily due to the development of the megacity of Shenzhen (population 17.7 million), the hydrodynamics of Deep Bay have changed, with knock-on effects of sedimentation, input of pollutants, and changes in the macrobenthos. The wintering waterbirds community responded to these changes both in total numbers and the relative importance of feeding guilds. Where total bird counts are positively influenced by benthic biomass, and the benthic biomass is positively correlated to the water quality that is driven by the cleansing effect of tidal flushing. These anthropogenic drivers have negatively impacted migratory birds that use Deep Bay as a refueling station. This study highlights the need for policymakers to control these drivers and limit the level to which sensitive coastlines are urbanized.
英文关键词	Urbanization Estuarine wetlands Migratory birds Reclamation Water quality Ecosystem services Mangroves Mudflat
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001094794500001
WOS关键词	PEARL RIVER ESTUARY ; HONG-KONG ; DEEP BAY ; WATERBIRDS ; CONSERVATION ; HABITATS ; DYNAMICS ; CHINA
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405424
推荐引用方式 GB/T 7714	Leung, Felix,Doherty, Philip D.,Liu, Mingfeng,et al. Rise and fall of an avian oasis: Tracking the impacts of land use change in a key coastal wetland in the world's largest megalopolis[J],2024,906.
APA	Leung, Felix,Doherty, Philip D.,Liu, Mingfeng,Metcalfe, Kristian,Godley, Brendan,&Lee, Shing Yip.(2024).Rise and fall of an avian oasis: Tracking the impacts of land use change in a key coastal wetland in the world's largest megalopolis.SCIENCE OF THE TOTAL ENVIRONMENT,906.
MLA	Leung, Felix,et al."Rise and fall of an avian oasis: Tracking the impacts of land use change in a key coastal wetland in the world's largest megalopolis".SCIENCE OF THE TOTAL ENVIRONMENT 906(2024).