@article{fdi:010091996, title = {{N}itrogen fixation in the {N}orth {A}tlantic supported by {G}ulf {S}tream eddy-borne diazotrophs}, author = {{H}oerstmann, {C}. and {A}guiar-{G}onzález, {B}. and {B}arrillon, {S}. and {B}astos, {C}. {C}. and {G}rosso, {O}. and {P}erez-{H}ernández, {M}. {D}. and {D}oglioli, {A}. {M}. and {P}etrenko, {A}. {A}. and {C}arracedo, {L}. {I}. and {B}enavides, {M}ar}, editor = {}, language = {{ENG}}, abstract = {{M}esoscale oceanic eddies contribute to the redistribution of resources needed for plankton to thrive. {H}owever, due to their fluid-trapping capacity, they can also isolate plankton communities, subjecting them to rapidly changing environmental conditions. {D}iazotrophs, which fix dinitrogen ({N}-2), are key members of the plankton community, providing reactive nitrogen, particularly in large nutrient-depleted regions such as subtropical gyres. {H}owever, there is still limited knowledge about how mesoscale structures characterized by specific local environmental conditions can affect the distribution and metabolic response of diazotrophs when compared with the large-scale dynamics of an oceanic region. {H}ere we investigated genetic diazotroph diversity and {N}-2 fixation rates in a transect across the {G}ulf {S}tream and two associated eddies, a region with intense mesoscale activity known for its important role in nutrient transport into the {N}orth {A}tlantic {G}yre. {W}e show that eddy edges are hotspots for diazotroph activity with potential community connectivity between eddies. {U}sing a long-term mesoscale eddy database, we quantified {N}-2 fixation rates as up to 17 times higher within eddies than in ambient waters, overall providing similar to 21 mu mol {N} m(-2) yr(-1) to the region. {O}ur results indicate that mesoscale eddies are hotspots of reactive nitrogen production within the broader marine nitrogen cycle.}, keywords = {{ATLANTIQUE} {NORD}}, booktitle = {}, journal = {{N}ature {G}eoscience}, volume = {17}, numero = {}, pages = {1141--1147}, ISSN = {1752-0894}, year = {2024}, DOI = {10.1038/s41561-024-01567-2}, URL = {https://www.documentation.ird.fr/hor/fdi:010091996}, }