Changes in wintering Hooded Cranes and their habitats at Chongming Dongtan over the past 20 years  

作　　者：Yanlin Cui Yanan Tang Sen Yang Wei Wu Xuesong Feng Qiang Ma Dongliang Niu Jun Ma Zhijun Ma 

机构地区：[1]Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering,National Observation and Research Station for Wetland Ecosystems of the Yangtze Estuary,Fudan University,Shanghai,200438,China [2]Management Office of Chongming Dongtan Nature Reserve,Chongming,202183,China

出　　处：《Avian Research》2023年第1期119-125,共7页鸟类学研究（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(2022YFF1301004);the Science and Technology Department of Shanghai(21DZ1201902);the Shanghai Landscaping and City Appearance Administrative Bureau(G201610)。

摘　　要：The Hooded Crane(Grus monacha)is listed as a Vulnerable species in the IUCN red list.Tidal wetland(tideland),the major habitat for wintering Hooded Cranes at East China’s Chongming Dongtan,has dramatically changed in the past two decades,but there is limited knowledge about the population and habitat changes of the Hooded Cranes.This study investigated the population size and distribution of wintering Hooded Cranes at Chongming Dongtan from 2000 to 2021.We used remote sensing images combined with a vegetation classification algorithm to analyse the distribution of saltmarsh vegetation.The quadrat method was used to investigate the density and weight of the underground corms of Sea Bulrush(Scirpus mariquter),the main food on tideland for the Hooded Cranes.From 2000 to 2021,the population number of wintering Hooded Cranes at Chongming Dongtan remained stable at approximately 100.In 2000,the area of Scirpus spp.and Common Reed(Phragmites australis)accounted for approximately half of the total saltmarsh area at Chongming Dongtan,respectively.The invasive Smooth Cordgrass(Spartina alterniflora)rapidly expanded on tideland in the 2000s while the Scirpus spp.was competed out and thus significantly reduced in area.After the implementation of an ecological project to control Smooth Cordgrass and to restore Scirpus spp.in the 2010s,the area of the Smooth Cordgrass decreased considerably while the area of Scirpus spp.increased.The corms of Sea Bulrush decreased on the southeastern tideland during the study period,which might be the cause of the northward movement of the foraging Hooded Cranes on tideland.We also found Hooded Cranes foraged crops in the nearby farmland in mid-winter,causing human-bird conflicts in the recent decade.Our results found that changes in habitat and food conditions on tideland impacted wintering Hooded Cranes.Foraging in farmland with human disturbance in the recent decade might be related to insufficient food on tideland.We suggest active intervention to accelerate the restoration of Sea Bulrus

关 键 词：FOOD Habitat change Salt marsh Scirpus mariquter Tidal flat Wintering ground 

分 类 号：Q958[生物学—动物学]