DSpace Repository

Millennial-scale isotope records from a wide-ranging predator show evidence of recent human impact to oceanic food webs

Show simple item record

dc.contributor.author Wiley, Anne E. en
dc.contributor.author Ostrom, Peggy H. en
dc.contributor.author Welch, Andreanna J. en
dc.contributor.author Fleischer, Robert C. en
dc.contributor.author Gandhi, Hasand en
dc.contributor.author Southon, John R. en
dc.contributor.author Stafford, Thomas W. en
dc.contributor.author Penniman, Jay F. en
dc.contributor.author Hu, Darcy en
dc.contributor.author Duvall, Fern P. en
dc.contributor.author James, Helen F. en
dc.date.accessioned 2013-07-30T13:48:48Z
dc.date.available 2013-07-30T13:48:48Z
dc.date.issued 2013
dc.identifier.citation Wiley, Anne E., Ostrom, Peggy H., Welch, Andreanna J., Fleischer, Robert C., Gandhi, Hasand, Southon, John R., Stafford, Thomas W., Penniman, Jay F., Hu, Darcy, Duvall, Fern P., and James, Helen F. 2013. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F21098">Millennial-scale isotope records from a wide-ranging predator show evidence of recent human impact to oceanic food webs</a>." <em>Proceedings of the National Academy of Sciences of the United States of America</em>. 110 (22):8972&ndash;8977. <a href="https://doi.org/10.1073/pnas.1300213110">https://doi.org/10.1073/pnas.1300213110</a> en
dc.identifier.issn 0027-8424
dc.identifier.uri http://hdl.handle.net/10088/21098
dc.description.abstract Human exploitation of marine ecosystems is more recent in oceanic than near shore regions, yet our understanding of human impacts on oceanic food webs is comparatively poor. Few records of species that live beyond the continental shelves date back more than 60 y, and the sheer size of oceanic regions makes their food webs difficult to study, even in modern times. Here, we use stable carbon and nitrogen isotopes to study the foraging history of a generalist, oceanic predator, the Hawaiian petrel (Pterodroma sandwichensis), which ranges broadly in the Pacific from the equator to near the Aleutian Islands. Our isotope records from modern and ancient, radiocarbon-dated bones provide evidence of over 3,000 y of dietary stasis followed by a decline of ca. 1.8? in ?15N over the past 100 y. Fishery-induced trophic decline is the most likely explanation for this sudden shift, which occurs in genetically distinct populations with disparate foraging locations. Our isotope records also show that coincident with the apparent decline in trophic level, foraging segregation among petrel populations decreased markedly. Because variation in the diet of generalist predators can reflect changing availability of their prey, a foraging shift in wide-ranging Hawaiian petrel populations suggests a relatively rapid change in the composition of oceanic food webs in the Northeast Pacific. Understanding and mitigating widespread shifts in prey availability may be a critical step in the conservation of endangered marine predators such as the Hawaiian petrel. en
dc.relation.ispartof Proceedings of the National Academy of Sciences of the United States of America en
dc.title Millennial-scale isotope records from a wide-ranging predator show evidence of recent human impact to oceanic food webs en
dc.type Journal Article en
dc.identifier.srbnumber 115945
dc.identifier.doi 10.1073/pnas.1300213110
rft.jtitle Proceedings of the National Academy of Sciences of the United States of America
rft.volume 110
rft.issue 22
rft.spage 8972
rft.epage 8977
dc.description.SIUnit NH-Vertebrate Zoology en
dc.description.SIUnit NMNH en
dc.description.SIUnit Peer-reviewed en
dc.description.SIUnit NZP en
dc.citation.spage 8972
dc.citation.epage 8977


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Browse

My Account

Statistics