近40年陕西榆林地区鸟类组成和区系变化

Avifauna and Composition Changes in the Last 40 Years in Yulin City,Shaanxi Province

2001-2013年，采用样线法和定点观察法对陕西省榆林地区鸟类进行了调查，并与1958-1980年鸟类资源调查结果进行比较。结果表明：2001-2013年共记录鸟类243种，隶属于18目53科；较1958-1980年调查结果（148种，隶属于17目47科）增加95种。其中，新增加了陕西省鸟类新纪录3种。从动物地理区划来看，古北界增加了75种，东洋界增加了10种，广布种增加了18种；从居留型情况来看，留鸟增加了26种，夏候鸟增加了20种，冬候鸟增加了16种，旅鸟增加了31种。同时，分析了全球气候变暖和生态环境变化下，陕西榆林地区鸟类组成、区系和生态分布上的变化。

The avifauna and composition of birds in Yulin city of Northern Shaanxi province were investigated from 2001 to 2013 by line transect method and fixed point observation, and the result was compared with the survey of 1958-1980. A total of 243 bird species, belonging to 18 orders and 53 families, were recorded in the current survey, whereas 148 species, belonging to 17 orders and 47 families were recorded about 40 years ago. Additionally, three species were new recorded in Shaanxi province, and 75 species of Palaearctic realm, 10 of Oriental realm, and 18 of widespread species were increased, based on animal geographical regionalization. Moreover, 26, 20, 16, 31 species of resident, summer visitors, winter visitors and passage migrants in residence type were also increased, respectively. Finally, the variations of composition, avifauna and distribution under the impacts of global warming and ecological environment in Yulin city were investigated.