10.5061/DRYAD.66JD4
Ostrom, Peggy H.
Michigan State University
Wiley, Anne E.
University of Akron
James, Helen F.
Japan Agency for Marine-Earth Science and Technology
Rossman, Sam
Michigan State University
Walker, William A.
Alaska Fisheries Science Center
Zipkin, Elise F.
Michigan State University
Chikaraishi, Yoshito
Hokkaido University
Data from: Broad-scale trophic shift in the pelagic North Pacific revealed
by an oceanic seabird
Dryad
dataset
2017
anthropogenic impact
Seabird Ecology
Pterodroma sandwichensis
Oceanography
Stable isotope biogeochemistry
Holocene
National Science Foundation
https://ror.org/021nxhr62
DEB-0745604
2017-03-06T14:21:26Z
2017-03-06T14:21:26Z
en
https://doi.org/10.1098/rspb.2016.2436
26969 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Human-induced ecological change in the open oceans appears to be
accelerating. Fisheries, climate change and elevated nutrient inputs are
variously blamed, at least in part, for altering oceanic ecosystems. Yet
it is challenging to assess the extent of anthropogenic change in the open
oceans, where historical records of ecological conditions are sparse, and
the geographical scale is immense. We developed millennial-scale amino
acid nitrogen isotope records preserved in ancient animal remains to
understand changes in food web structure and nutrient regimes in the
oceanic realm of the North Pacific Ocean (NPO). Our millennial-scale
isotope records of amino acids in bone collagen in a wide-ranging oceanic
seabird, the Hawaiian petrel (Pterodroma sandwichensis), showed that
trophic level declined over time. The amino acid records do not support a
broad-scale increase in nitrogen fixation in the North Pacific subtropical
gyre, rejecting an earlier interpretation based on bulk and amino acid
specific δ15N chronologies for Hawaiian deep-sea corals and bulk δ15N
chronologies for the Hawaiian petrel. Rather, our work suggests that the
food web structure in the NPO has shifted at a broad geographical scale, a
phenomenon potentially related to industrial fishing.
Ostrom et al Hawaiian Petrel amino acid N isotope dataAmino acid specific
nitrogen isotope data from Hawaiian petrel gelatinOstrom et al Isotope
Data.csv
North Pacific Ocean