title: [Roosting-site characteristics of wintering black-necked cranes (Grus nigricollis) at Napahai, Yunnan].
abstract: From November 2009 to April 2010, roosting-site characteristics of black-necked cranes (Grus nigricollis) were observed at Napahai Provincial Nature Reserve, Shangri-La, Yunnan, China. The positions of roosting-sites were determined by triangulation with markers and field correction. All of the 63 roosting-sites observed were located in patchy marshes with water, which contained some mud on the bottom and 81% of the roosting-sites were covered by plants. They also had a certain distance to areas of human activities and had a certain distance to the shore. A comparison of roosting sites and random sites showed that roosting-sites had thicker mud layers, a higher ratio of open water, longer distance to roads, villages, and farmland, and water depth. Another comparison of before and after usage of roosting-sites found a significant difference in area of marsh patch. Principal component analysis indicated that the usage of roosting-site of black-necked cranes was affected by human disturbance, area of marsh patch, and the condition of the shallow water environment.
authors.affiliation: Kunming Institute of Zoology, the Chinese Academy of Sciences, Kunming Yunnan, China.
authors.forename: Peng
authors.initials: P
authors.lastname: He
authors.forename: De-Jun
authors.initials: DJ
authors.lastname: Kong
authors.forename: Qiang
authors.initials: Q
authors.lastname: Liu
authors.forename: Hong-Zhong
authors.initials: HZ
authors.lastname: Yu
authors.forename: Jian-Lin
authors.initials: JL
authors.lastname: Zhao
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Yang
mesh_terms: D025041:Animal Migration; D000818:Animals; D001717:Birds / Q000502:physiology*; D002681:China; D017753:Ecosystem; D012621:Seasons