内蒙古鄂尔多斯高原鸟类区系组成及其特征

2005年和2008-2009年，以样带法和固定半径样点法，对内蒙古鄂尔多斯高原鸟类区系进行了调查。调查期间共记录到鸟类168种，隶属于14目39科。其中，留鸟31种，夏候鸟73种，旅鸟60种，冬候鸟4种。繁殖鸟104种，构成鸟类区系的主体。繁殖鸟中北方型种类有92种，占繁殖鸟总数的88.5%，北方型种类占绝对优势，具有典型的古北界特征。在所记录鸟类中，有国家I级重点保护鸟类5种，国家Ⅱ级重点保护鸟类21种。调查区域主要由林地、灌丛草地、湿地、农田和居民区5种生境类型组成，调查结果表明：人类活动对鸟类区系组成有较大影响。

Study on Features of Avifauna in the Ordos Plateau in Inner Mongolia

In this study,the transect method and fixed-radius sample plot method were used to carry out the detailed surveys on birds in the Ordos Plateau in Inner Mongolia in 2005 and during the period of 2008-2009.During the investigations,168 bird species in 14 orders and 39 families were recorded.Among them 31 species were residents,73 species summer visitors,60 species migrants and 4 species winter visitors.There were 104 species of breeding birds,and they had significant advantages and constituted the main body of avifauna.There were 92 middle-and northern-boundary breeding bird species,accounting for 88.5% of the total,and the northern-boundary species was absolutely dominant.The elements of Palaearctic realm played the important roles in the avifauna.Among the birds,5 species were listed as national first-grade protected wildlife in China,and 21 species as the second-grade ones.There were 5 kinds of habitats in the study area,i.e.the forestlands,thicket grasslands,wetlands,farmlands and residential areas.Survey results revealed that human activities affected significantly the birds avifauna.