Drivers of a habitat shift by critically endangered Siberian cranes: Evidence from long-term data

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dc.contributor.authorHou, Jinjinen
dc.contributor.authorLiu, Yifeien
dc.contributor.authorFraser, James D.en
dc.contributor.authorLi, Leien
dc.contributor.authorZhao, Binen
dc.contributor.authorLan, Zhichunen
dc.contributor.authorJin, Jiefengen
dc.contributor.authorLiu, Guanhuaen
dc.contributor.authorDai, Nianhuaen
dc.contributor.authorWang, Wenjuanen
dc.contributor.departmentFish and Wildlife Conservationen
dc.date.accessioned2020-10-02T14:10:47Zen
dc.date.available2020-10-02T14:10:47Zen
dc.date.issued2020-09en
dc.description.abstractMany waterbird populations have become increasingly dependent on agricultural habitats for feeding. While habitat destruction has been proposed as a key reason forcing waterbirds to move from natural habitats to agricultural habitats, few have used long-term data to test this hypothesis. The Siberian crane (Leucogeranus leucogeranus) is an IUCN Critically Endangered species. About 98% of its global population winters at Poyang Lake, China. Recently, many cranes shifted from feeding in natural wetlands to agricultural habitats. Here, we integrate bird surveys,Vallisneriatuber (the traditional food of cranes in natural wetlands) surveys, water level data, and remotely sensed images from 1999 to 2016 to explore the drivers of this habitat shift. Changes in Siberian crane numbers in natural wetlands and agricultural fields indicated that the habitat shift occurred in the winters of 2015-2016. Analyses using generalized linear mixed models suggested that crane numbers in natural wetlands were positively related to tuber density and the interaction between dry season (October-March) water level and tuber density. The changes in tuber density and dry season water level in 2015-2016 indicated that tuber disappearance may have been the primary driver of the habitat shift, with a smaller effect of high water level. Submerged plants at Poyang Lake have degraded seriously in the past two decades. The plant degradation at Shahu Lake, a sublake of Poyang Lake, may have been caused by high spring water, high winter temperature, and low summer temperature. However, the drivers of tuber disappearance at Poyang Lake may not be restricted to these variables. Because Poyang Lake is an important refuge for many waterbirds in the Yangtze River floodplain, it is urgent to take effective measures to restore its submerged plants and ecosystem health. Agricultural fields can be important refuges for Siberian cranes, mitigating the negative impacts of wetland deterioration.en
dc.description.notesNational Natural Science Foundation of China, Grant/Award Number: 31772480 and 31401969; Natural Science Foundation of Jiangxi Province, Grant/Award Number: 20181BAB214007; Funding Project of Jiangxi Academy of Sciences, Grant/Award Number: 2020-YGY-01en
dc.description.sponsorshipNational Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31772480, 31401969]; Natural Science Foundation of Jiangxi ProvinceNatural Science Foundation of Jiangxi Province [20181BAB214007]; Jiangxi Academy of Sciences [2020-YGY-01]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1002/ece3.6720en
dc.identifier.issn2045-7758en
dc.identifier.urihttp://hdl.handle.net/10919/100138en
dc.language.isoenen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectagricultural habitatsen
dc.subjectfood shortageen
dc.subjectLeucogeranus leucogeranusen
dc.subjectsubmerged plantsen
dc.subjectYangtze Riveren
dc.titleDrivers of a habitat shift by critically endangered Siberian cranes: Evidence from long-term dataen
dc.title.serialEcology and Evolutionen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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