Background:The Black-faced Spoonbill(Platalea minor)is a globally threatened species,nesting mainly in western Korea with smaller numbers breeding in Liaoning Province,China,and Far East Russia.Recent winter field sur...Background:The Black-faced Spoonbill(Platalea minor)is a globally threatened species,nesting mainly in western Korea with smaller numbers breeding in Liaoning Province,China,and Far East Russia.Recent winter field surveys to estimate the species'population size were almost totally conducted in coastal areas,but tracking studies showed that some individuals now winter inland.To ensure its long-term survival,we need a more comprehensive assessment of the current distribution and abundance of the species.Methods:We combined the most recent count data and satellite tracking information to update existing informa-tion about the population abundance and distribution of the Black-faced Spoonbill at all stages of its annual life cycle,and how these have changed during 2004-2020.Results:Black-faced Spoonbills mainly breed on the west coast of the Korean peninsula,while immature birds show a wider summer distribution throughout Yellow Sea coastal areas,when a few remain on wintering sites in the south.Combined tracking results and mid-winter counts confirmed known wintering sites on the east and south coasts of China,but showed that the species also winters on wetlands in the Yangtze River floodplain and in Southeast Asia.During 2004-2020,counts of wintering birds in coastal habitats increased from 1198 to 4864,with numbers wintering on the island of Taiwan contributing most to the overall increase.Latest counts found 5222 in 2021.We also identify key wintering and stopover sites as well as their current conservation status.Conclusions:This study revised the known summering and wintering ranges of the Black-faced Spoonbill and assessed the conservation status of key sites based on a combination of field survey and satellite tracking data.We recommend prioritisation of further field research to identify and survey inland wintering areas in the Yangtze River floodplain and summering areas of immature birds.More tracking of adult individuals and birds during spring migration is necessary to fill these information gaps.We also suggest establishing a Black-faced Spoonbill monitoring platform to store,share and show real-time distribution range and population abundance data.展开更多
Artificial/seminatural environments,such as aquacultural ponds,saltpans,and croplands,have recently been acknowledged as important habitats for coastal waterbirds.Although coastal waterbirds tend to use artificial hab...Artificial/seminatural environments,such as aquacultural ponds,saltpans,and croplands,have recently been acknowledged as important habitats for coastal waterbirds.Although coastal waterbirds tend to use artificial habitats around tidal flats as roosting sites during high-tide,it remains unclear whether the importance of surrounding habitats relative to tidal flats varies among landscape types,seasons,species,or tidal conditions.The Black-faced Spoonbill(Platalea minor)and Eurasian Spoonbill(P.leucorodia)are two closely related sympatric species in East Asia with narrow and wide distribution ranges and habitat requirements,respectively.We therefore expect that both species will use surrounding artificial habitats across seasons at high tides,but Blackfaced Spoonbills will use them less frequently than Eurasian Spoonbills.Here,we address these hypotheses in the Imazu tidal flat and its surrounding environments in southern Japan.We investigated the habitat use and behavioral patterns of both species through route and behavioral surveys during the fall migration and wintering seasons in 2021.We found that both species used surrounding habitats including artificial ones more frequently than the tidal flat regardless of the tidal condition or season,but spoonbills used these habitats more frequently in winter than in autumn.We also found that Eurasian Spoonbills foraged in surrounding artificial habitats more frequently than Black-faced Spoonbills.These results not only demonstrate how coastal waterbirds exploit surrounding habitats relative to tidal flats but also suggest that the importance of surrounding habitats varies among species and seasons.Our study thus emphasizes that valuing and managing surrounding habitats in addition to tidal flats are key to conserving globally declining waterbirds.展开更多
Wintering waterbirds surveys were conducted throughout the coastal areas of Hainan,China,from 2003 to 2005,with the aim of further strengthening the conservation and management of wetlands in Hainan Island.A total of ...Wintering waterbirds surveys were conducted throughout the coastal areas of Hainan,China,from 2003 to 2005,with the aim of further strengthening the conservation and management of wetlands in Hainan Island.A total of 68 species were recorded at 20 coastal wetlands.Three recently found wintering sites for the globally endangered Black-faced Spoonbill (Plataleaminor),i.e.Houshui Bay of Lingao,Beili Bay of Dongfang Counties and Sanya River in Sanya City were then extensively monitored during a period of 2003-2009.The largest number of birds were egrets and herons,followed by shorebirds,gulls and terns.On average,the total number of species and individuals at sites with mangrove forests were significantly greater than those of sites without mangrove forests.Some sites,important for conservation,were identified,such as Bopu Bay,Huanglonggang,Houshui Bay,Yangpugang,Beili Bay,Yinggehai,Sanya River,Qinlangang and Dongzhaigang.Thus,human disturbance at these important sites should be avoided.展开更多
The Zuibaiji River is located in the west of Fukuoka city, which has a rich natural resources and history but various problems as well. In order to solve some of these problems, stakeholders need to observe and talk a...The Zuibaiji River is located in the west of Fukuoka city, which has a rich natural resources and history but various problems as well. In order to solve some of these problems, stakeholders need to observe and talk about the river. Also recently, the ＂MIZBERING Project＂ has been opening up possibilities for renewing riverside uses of lost activities from the old days in Japan. This project is being conducted by citizens, companies and government administrations with an interest in waterside areas. The First MIZBER1NG Zuibaiji River Conference was held to discuss the issues of the Zuibaiji Basin. Its purpose was to visit and search out the nature and history of the entire Zuibaiji Basin from its mountains to the sea and to rediscover the Zuibaiji Basin, and finally to discuss future plans for the Zuibaiji Basin and Imazu Tidal Flat at its outlet. After visiting the Zuibaiji Basin, we discovered a problem that the Zubaiji Dam is holding not only water but also sand, and this problem affects the environment of the Zuibaiji Basin, such as its ecosystem and topography. Finally, we provided a venue for the local people to discuss problems and future plans for the Zuibaiji Basin.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.31870369 and 31970433)China Biodiversity Observation Networks(Sino BON)。
文摘Background:The Black-faced Spoonbill(Platalea minor)is a globally threatened species,nesting mainly in western Korea with smaller numbers breeding in Liaoning Province,China,and Far East Russia.Recent winter field surveys to estimate the species'population size were almost totally conducted in coastal areas,but tracking studies showed that some individuals now winter inland.To ensure its long-term survival,we need a more comprehensive assessment of the current distribution and abundance of the species.Methods:We combined the most recent count data and satellite tracking information to update existing informa-tion about the population abundance and distribution of the Black-faced Spoonbill at all stages of its annual life cycle,and how these have changed during 2004-2020.Results:Black-faced Spoonbills mainly breed on the west coast of the Korean peninsula,while immature birds show a wider summer distribution throughout Yellow Sea coastal areas,when a few remain on wintering sites in the south.Combined tracking results and mid-winter counts confirmed known wintering sites on the east and south coasts of China,but showed that the species also winters on wetlands in the Yangtze River floodplain and in Southeast Asia.During 2004-2020,counts of wintering birds in coastal habitats increased from 1198 to 4864,with numbers wintering on the island of Taiwan contributing most to the overall increase.Latest counts found 5222 in 2021.We also identify key wintering and stopover sites as well as their current conservation status.Conclusions:This study revised the known summering and wintering ranges of the Black-faced Spoonbill and assessed the conservation status of key sites based on a combination of field survey and satellite tracking data.We recommend prioritisation of further field research to identify and survey inland wintering areas in the Yangtze River floodplain and summering areas of immature birds.More tracking of adult individuals and birds during spring migration is necessary to fill these information gaps.We also suggest establishing a Black-faced Spoonbill monitoring platform to store,share and show real-time distribution range and population abundance data.
文摘Artificial/seminatural environments,such as aquacultural ponds,saltpans,and croplands,have recently been acknowledged as important habitats for coastal waterbirds.Although coastal waterbirds tend to use artificial habitats around tidal flats as roosting sites during high-tide,it remains unclear whether the importance of surrounding habitats relative to tidal flats varies among landscape types,seasons,species,or tidal conditions.The Black-faced Spoonbill(Platalea minor)and Eurasian Spoonbill(P.leucorodia)are two closely related sympatric species in East Asia with narrow and wide distribution ranges and habitat requirements,respectively.We therefore expect that both species will use surrounding artificial habitats across seasons at high tides,but Blackfaced Spoonbills will use them less frequently than Eurasian Spoonbills.Here,we address these hypotheses in the Imazu tidal flat and its surrounding environments in southern Japan.We investigated the habitat use and behavioral patterns of both species through route and behavioral surveys during the fall migration and wintering seasons in 2021.We found that both species used surrounding habitats including artificial ones more frequently than the tidal flat regardless of the tidal condition or season,but spoonbills used these habitats more frequently in winter than in autumn.We also found that Eurasian Spoonbills foraged in surrounding artificial habitats more frequently than Black-faced Spoonbills.These results not only demonstrate how coastal waterbirds exploit surrounding habitats relative to tidal flats but also suggest that the importance of surrounding habitats varies among species and seasons.Our study thus emphasizes that valuing and managing surrounding habitats in addition to tidal flats are key to conserving globally declining waterbirds.
基金supported by the State Forestry Administration of China,WWF-China and the Forestry Department of Hainan Province
文摘Wintering waterbirds surveys were conducted throughout the coastal areas of Hainan,China,from 2003 to 2005,with the aim of further strengthening the conservation and management of wetlands in Hainan Island.A total of 68 species were recorded at 20 coastal wetlands.Three recently found wintering sites for the globally endangered Black-faced Spoonbill (Plataleaminor),i.e.Houshui Bay of Lingao,Beili Bay of Dongfang Counties and Sanya River in Sanya City were then extensively monitored during a period of 2003-2009.The largest number of birds were egrets and herons,followed by shorebirds,gulls and terns.On average,the total number of species and individuals at sites with mangrove forests were significantly greater than those of sites without mangrove forests.Some sites,important for conservation,were identified,such as Bopu Bay,Huanglonggang,Houshui Bay,Yangpugang,Beili Bay,Yinggehai,Sanya River,Qinlangang and Dongzhaigang.Thus,human disturbance at these important sites should be avoided.
文摘The Zuibaiji River is located in the west of Fukuoka city, which has a rich natural resources and history but various problems as well. In order to solve some of these problems, stakeholders need to observe and talk about the river. Also recently, the ＂MIZBERING Project＂ has been opening up possibilities for renewing riverside uses of lost activities from the old days in Japan. This project is being conducted by citizens, companies and government administrations with an interest in waterside areas. The First MIZBER1NG Zuibaiji River Conference was held to discuss the issues of the Zuibaiji Basin. Its purpose was to visit and search out the nature and history of the entire Zuibaiji Basin from its mountains to the sea and to rediscover the Zuibaiji Basin, and finally to discuss future plans for the Zuibaiji Basin and Imazu Tidal Flat at its outlet. After visiting the Zuibaiji Basin, we discovered a problem that the Zubaiji Dam is holding not only water but also sand, and this problem affects the environment of the Zuibaiji Basin, such as its ecosystem and topography. Finally, we provided a venue for the local people to discuss problems and future plans for the Zuibaiji Basin.
