Grazing intensity drives a trophic shift in the diet of common alpine birds : raw data

raw data with isotopic ratio measured for15N and 13C, from the faeces of alpine birds (oenanthe oenanthe and anthus spinoletta), and some arthropods本数据集收录了源自高山鸟类（穗鵖*Oenanthe oenanthe*、水鹨*Anthus spinoletta*）粪便及部分节肢动物的氮15与碳13同位素比值实测原始数据。