%0 Journal Article
%T Nest-site Selection and Competition Coexistence of Horned Larks and Small Skylarks<br>角百灵和小云雀的巢址选择与竞争共存
%A ZHAO Liang
%A ZHANG Xiao-ai
%A <br>赵亮
%A 张晓爱
%J 动物学研究
%D 2004
%I Chinese Academy of Sciences
%X We investigated nest-site characteristics and reproductive season changes of horned larks (Eremophila alpestris) and small skylarks (Alauda gulgula) during three periods from Apr.to Sep.in 2000-2002 at Haibei Alpine Meadow Ecosystem Research Station,the Chinese Academy of Sciences,in northern Qinghai Province.Nests of horned lark (n=27) and small skylark (n=43) were used to eximined nest-site characteristics.We used stable isotopes to determine the dietary contributions ratio of raise nestling,and compare nest-site characteristics and overlap degree of diet of horned lark and small skylark.The result shown:1)there was significantly difference between the exoteric degrees of nests in horned lark and small skylark (P<0.01),which were 92.16% and 34.61%,respectively.2)the number of distance to nearest structural element of horned lark (0.07±0.26) was significantly lower than that of small skylark (2.57±1.19)(P<0.01).3)the vegetation height and the percentage of vegetation cover of nest-site of small skylark were significantly higher than those of horned lark(P<0.01).4)the food resource,reproductive season length and reproductive frequency largely overlapped in these two species.There is a balance between cost and benefit of horned lark and small skylark in nest-site selection.It is possible that predation and thermal consideration have guided the evolution of nest-site selection of two species,and the coexistence mechanism of them is nest-site differentiation.
%K Eremophila alpestris
%K Alauda gulgula
%K Nest-site selection
%K Nest predation
%K Thermal consideration
%K Competition
%K Coexistence<br>角百灵
%K 小云雀
%K 巢址
%K 竞争
%K 捕食
%K 繁殖
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=7C502F1A6798ACE1B8C57E291C48C7F1&aid=65A7B6D942E0E9A8&yid=D0E58B75BFD8E51C&vid=C5154311167311FE&iid=38B194292C032A66&sid=FEF02B4635FE8227&eid=02DC3A182A5530DF&journal_id=0254-5853&journal_name=动物学研究&referenced_num=5&reference_num=37