Diet shift of upland buzzards (Buteo hemilasius): evidence from stable carbon isotope ratios

NWIPB OpenIR

	Diet shift of upland buzzards (Buteo hemilasius): evidence from stable carbon isotope ratios
	Yi Xianfeng ; Li Laixing ; Zhang Xiaoai ; Li Mingcai
	2003
发表期刊	动物学报 ; Yi Xianfeng,Li Laixing,Zhang Xiaoai,Li Mingcai.Diet shift of upland buzzards (Buteo hemilasius): evidence from stable carbon isotope ratios.动物学报,2003,49(6):764-768
摘要	We measured the stable carbon isotope ratios for muscle of the upland buzzards (Buteo hemilasius), plateau pika (Ochotoma curzoniae), root vole (Microtus oeconomus), plateau zokor (Myospalax fontanierii) and passerine bird species at the Haibei Alpine Meadow Ecosystem Research Station (HAMERS), and provided diet information of upland buzzards with the measurement of stable carbon isotopes in tissues of these consumers. The results showed that δ~(13)C values of small mammals and passerine bird species ranged from -25.57‰ to -25.78‰ (n = 12), and from -24.81‰ to -22.51% (n = 43), respectively, δ~(13)C values of the upland buzzards ranged from -22.60‰ to -23.10‰ when food was not available. The difference in δ~(13)C values (2.88‰±0.31‰) between upland buzzards and small mammals was much larger than the differences reported previously, 1‰-2‰, and showed significant difference, while 1.31‰±0.34‰ between upland buzzard and passerine bird species did not differ from the previously reported trophic fractionation difference of 1‰-2‰. Estimation of trophic position indicated that upland buzzards stand at trophic position 4.23, far from that of small mammals, i.e., upland buzzards scarcely captured small mammals as food at the duration of food shortage. According to isotope mass balance model, small mammals contributed 7.89% to 35.04% of carbon to the food source of the upland buzzards, while passerine bird species contributed 64.96% to 92.11%. Upland buzzards turned to passerine bird species as food during times of shortage of small mammals. δ~(13)C value, a useful indicator of diet, indicates that the upland buzzards feed mainly on passerine bird species rather than small mammals due to "you are what you eat" when small mammal preys are becoming scarce.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/14594
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Yi Xianfeng,Li Laixing,Zhang Xiaoai,et al. Diet shift of upland buzzards (Buteo hemilasius): evidence from stable carbon isotope ratios[J]. 动物学报, Yi Xianfeng,Li Laixing,Zhang Xiaoai,Li Mingcai.Diet shift of upland buzzards (Buteo hemilasius): evidence from stable carbon isotope ratios.动物学报,2003,49(6):764-768,2003.
APA	Yi Xianfeng,Li Laixing,Zhang Xiaoai,&Li Mingcai.(2003).Diet shift of upland buzzards (Buteo hemilasius): evidence from stable carbon isotope ratios.动物学报.
MLA	Yi Xianfeng,et al."Diet shift of upland buzzards (Buteo hemilasius): evidence from stable carbon isotope ratios".动物学报 (2003).