西藏典型城市公园繁殖鸟类中的外来鸟种

Exotic Bird Species in Breeding Birds in Typical Urban Parks in Tibet

选取位于西藏拉萨的罗布林卡、龙王潭公园、布达拉宫广场,位于林芝的福建公园,以及位于昌都的天津广场等5个城市公园,于2017年5—6月采取样线法对其中的鸟类群落组成和外来鸟种情况进行调查。调查共记录到鸟类9目20科36种,其中属于古北界的有12种,东洋界和广布种也均为12种。36种鸟类中,留鸟24种,夏候鸟6种,冬候鸟2种,旅鸟4种。统计到外来鸟种4种,包括山噪鹛(Garrulax davidi)、八哥(Acridotheres cristatellus)、红嘴相思鸟(Leiothrix lutea)及大紫胸鹦鹉(Psittacula derbiana),占调查鸟种种类的11.1%,外来物种的入侵风险在高原不容忽视。

Taking five urban parks as the observation sites,Norbulingka,Long Wangtan Park and Potala palace square in Lhasa,Fujian Park in Nyingchi,Tianjin Square in Qamdo,the bird community composition and exotic birds species were investigated between May and June,2017 by the line intercept method.Results should that 36 species in 9 orders and 20 families were recorded altogether.There were 12 Palaearctic species,12 Oriental realm species,and 12 Cosmopolitan species.Among them,24 species were residents,6 species were summer migrants,2 were winter migrants,and 4 were travelling birds.The 4 exotic species,plain laughingthrush(Garrulax davidi),mynah(Acridotheres cristatellus),Red-billed Leiothrix(Leiothrix lutea),and Debye parrot(Psittacula derbiana),accounted for 11.1%of the total bird species.These preliminary findings showed that the risks of invasive species couldnot be ignored on the plateau.