New IMBeR publication: Extending regional stable isotope analyses to global scales
IMBeR´s regional programme, CLIOTOP’s largest Task Team ‘Marine Predator Isotopes’ recently published an article in Global Ecology and Biogeography. The paper presents a global spatial and comparative analysis of nitrogen stable isotopes for three species of tuna: yellowfin, albacore and bigeye. Predictive models were employed to assess broad-scale spatial patterns and environmental drivers of oceanic food webs. The analyses highlighted that while there are regional differences in the trophic structure of oceanic ecosystems, globally, tunas share similar functional trophic roles. Their work suggests that habitat compression resulting from the predicted global expansion of oxygen minimum zones with ocean warming will impact marine food webs and the corresponding foraging habits of marine predators.
Pethybridge, H., Choy, C.A., Logan, J.M., Allain, V., Lorrain, A., Bodin, N., Somes, C.J., Young, J., Ménard, F., Langlais, C. & Duffy, L., (2018) A global meta‐analysis of marine predator nitrogen stable isotopes: Relationships between trophic structure and environmental conditions. Global Ecology and Biogeography. https://doi.org/10.1111/geb.12763