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Dietary change in seabirds on Guangjin Island, South China Sea, over the past 1200 years inferred from stable isotope analysis
Wu, LB; Liu, XD; Fu, PQ; Xu, LQ; Li, DN; Li, YL; ycx@ustc.edu.cn; xlq@hfut.edu.cn
2017
Source PublicationHOLOCENE
Volume27Issue:3Pages:331-338
AbstractQuantifying variation in animals' paleodiet from the fossil record is difficult as a continuous record of their remains is difficult to obtain. Here we assess dietary change in seabirds from Guangjin Island, Xisha Archipelago, South China Sea, by using stable nitrogen isotopes in seabird bones and prey remains collected from a coral sand ornithogenic sediment profile. N-15 of seabird bone collagen varied from 11.7 parts per thousand to 14.1 parts per thousand (averaging 12.8 parts per thousand +/- 0.4 parts per thousand), but that of fish bones and scales showed minor variations. Flying fish and squid are two favorite foods of tropical seabirds, and the average values of muscle N-15 in typical flying fish and squid samples were 9.2 parts per thousand and 10.2 parts per thousand, respectively. Based on nitrogen isotope mass balance calculation, we conclude that flying fish accounts for 80% +/- 40% of seabird diet averaged over the past 1200 years, but this prey accounted for only about 37% +/- 30% during the Little Ice Age' (AD 1400-1850). Flying fish averaged up to 88% +/- 2% during the Medieval Warm Period' (AD 850-1200), close to modern observed value of 89.6%. Thus, it appears that seabirds on Guangjin Island mainly preyed on flying fish during warm periods, and shift to squid during cooler periods. Our results suggest that recent global warming and human activities have likely caused a rapid decrease in tropical seabird population and dietary shift.
Department[Wu, Libin; Liu, Xiaodong; Li, Yeling] Univ Sci & Technol China, Inst Polar Environm, Sch Earth & Space Sci, Hefei 230026, Anhui, Peoples R China; [Fu, Pingqing] Chinese Acad Sci, Inst Atmospher Phys, LAPC, Beijing 100864, Peoples R China; [Xu, Liqiang] Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Anhui, Peoples R China; [Li, Daning] Chinese Acad Sci, South China Sea Inst Oceanol, Beijing 100864, Peoples R China
KeywordN-15 Bone Collagen Climate Change Fish Muscle Paleodiet Xisha Archipelago
Funding ProjectLMB
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/16246
Collection中科院海洋生物资源可持续利用重点实验室
Corresponding Authorycx@ustc.edu.cn; xlq@hfut.edu.cn
Recommended Citation
GB/T 7714
Wu, LB,Liu, XD,Fu, PQ,et al. Dietary change in seabirds on Guangjin Island, South China Sea, over the past 1200 years inferred from stable isotope analysis[J]. HOLOCENE,2017,27(3):331-338.
APA Wu, LB.,Liu, XD.,Fu, PQ.,Xu, LQ.,Li, DN.,...&xlq@hfut.edu.cn.(2017).Dietary change in seabirds on Guangjin Island, South China Sea, over the past 1200 years inferred from stable isotope analysis.HOLOCENE,27(3),331-338.
MLA Wu, LB,et al."Dietary change in seabirds on Guangjin Island, South China Sea, over the past 1200 years inferred from stable isotope analysis".HOLOCENE 27.3(2017):331-338.
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