Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Hemispheric asymmetry in ocean change and the productivity of ecosystem sentinels

Sydeman, W.J., Schoeman, D.S., Thompson, S.A., Hoover, B.A., García-Reyes, M., Daunt, F., Agnew, P., Anker-Nilssen, T., Barbraud, C., Barrett, R., Becker, P.H., Bell, E., Boersma, P.D., Bouwhuis, S., Cannell, B., Crawford, R.J.M., Dann, P., Delord, K., Elliott, G., Erikstad, K.E., Flint, E., Furness, R.W., Harris, M.P., Hatch, S., Hilwig, K., Hinke, J.T., Jahncke, J., Mills, J.A., Reiertsen, T.K., Renner, H., Sherley, R.B., Surman, C., Taylor, G., Thayer, J.A., Trathan, P.N., Velarde, E., Walker, K., Wanless, S., Warzybok, P. and Watanuki, Y. (2021) Hemispheric asymmetry in ocean change and the productivity of ecosystem sentinels. Science, 372 (6545). pp. 980-983.

Link to Published Version:
*Subscription may be required


Climate change and other human activities are causing profound effects on marine ecosystem productivity. We show that the breeding success of seabirds is tracking hemispheric differences in ocean warming and human impacts, with the strongest effects on fish-eating, surface-foraging species in the north. Hemispheric asymmetry suggests the need for ocean management at hemispheric scales. For the north, tactical, climate-based recovery plans for forage fish resources are needed to recover seabird breeding productivity. In the south, lower-magnitude change in seabird productivity presents opportunities for strategic management approaches such as large marine protected areas to sustain food webs and maintain predator productivity. Global monitoring of seabird productivity enables the detection of ecosystem change in remote regions and contributes to our understanding of marine climate impacts on ecosystems.

Item Type: Journal Article
Publisher: American Association for the Advancement of Science
Copyright: © 2021 American Association for the Advancement of Science.
Item Control Page Item Control Page