@article{fdi:010083323, title = {{I}mpact of intensifying nitrogen limitation on ocean net primary production is fingerprinted by nitrogen isotopes}, author = {{B}uchanan, {P}. {J}. and {A}umont, {O}livier and {B}opp, {L}. and {M}ahaffey, {C}. and {T}agliabue, {A}.}, editor = {}, language = {{ENG}}, abstract = {{T}he open ocean nitrogen cycle is being altered by increases in anthropogenic atmospheric nitrogen deposition and climate change. {H}ow the nitrogen cycle responds will determine long-term trends in net primary production ({NPP}) in the nitrogen-limited low latitude ocean, but is poorly constrained by uncertainty in how the source-sink balance will evolve. {H}ere we show that intensifying nitrogen limitation of phytoplankton, associated with near-term reductions in {NPP}, causes detectable declines in nitrogen isotopes (delta {N}-15) and constitutes the primary perturbation of the 21st century nitrogen cycle. {M}odel experiments show that similar to 75% of the low latitude twilight zone develops anomalously low delta {N}-15 by 2060, predominantly due to the effects of climate change that alter ocean circulation, with implications for the nitrogen source-sink balance. {O}ur results highlight that delta {N}-15 changes in the low latitude twilight zone may provide a useful constraint on emerging changes to nitrogen limitation and {NPP} over the 21st century.}, keywords = {}, booktitle = {}, journal = {{N}ature {C}ommunications}, volume = {12}, numero = {1}, pages = {6214 [9 ]}, year = {2021}, DOI = {10.1038/s41467-021-26552-w}, URL = {https://www.documentation.ird.fr/hor/fdi:010083323}, }