NDLI: Trophic segregation of Falkland Islands seabirds: insights from stable isotope analysis

Content Provider	Springer Nature Link
Author	Weiss, Felix Furness, Robert W. McGill, Rona A. R. Strange, Ian J. Masello, Juan F. Quillfeldt, Petra
Copyright Year	2009
Abstract	Seabird colonies provide rare opportunities to study trophic segregation in an entire bird community. We here present data on nitrogen and carbon isotope ratios of eight species of seabirds from New Island, Falkland Islands, and compare trophic levels (TL) and foraging distributions. We included adult feathers representing the interbreeding season, as well as chick feathers or down representing the breeding season. The stable isotope ratios indicated differences in feeding areas and TLs between species, consistent with the data of previous conventional diet analyses and observations at sea. We further reviewed conventional and stable isotope seabird community studies calculating the means and ranges of TLs observed across these studies. The mean TL (3.7) of the seabird community on New Island was at the lower end of the mean value range (3.5–4.5), but not significantly different, from the reviewed seabird communities. Seabirds on New Island had a range of 1.3 TLs, which is on the upper end of ranges within a community (0.4–1.5), indicating strong trophic structuring.
Starting Page	1753
Ending Page	1763
Page Count	11
File Format	PDF
ISSN	07224060
Journal	Polar Biology
Volume Number	32
Issue Number	12
e-ISSN	14322056
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-07-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Stable isotopes Seabird colonies Trophic level Falkland Islands Dietary segregation Zoology Ecology Plant Sciences Microbiology Oceanography
Content Type	Text
Resource Type	Article
Subject	Agricultural and Biological Sciences

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