Earth Sciences

Nutrient and arsenic biogeochemistry of Sargassum in the western Atlantic

D. J. M. Jr., P. L. Morton, et al.

Discover the fascinating dynamics of the Great Atlantic Sargassum Belt, where researchers including Dennis Joseph McGillicuddy Jr. and his colleagues reveal startling findings about the nutrient content and environmental influences on Sargassum proliferation since 2011. This study unveils how variations in nitrogen and phosphorus levels can indicate key nutrient sources affecting this unique marine ecosystem.

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Playback language: English

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Abstract

The Great Atlantic Sargassum Belt (GASB) has seen unprecedented Sargassum proliferation since 2011. This study shows that GASB Sargassum has higher nitrogen and phosphorus content than Sargassum in its Sargasso Sea habitat. Arsenic content in Sargassum reflects phosphorus limitation, following a hyperbolic relationship predicted by Michaelis-Menten kinetics. The nitrogen and phosphorus content, along with isotopic composition, can help identify nutrient sources (atmospheric, oceanic, or riverine).

Publisher

Nature Communications

Published On

Oct 05, 2023

Authors

Dennis Joseph McGillicuddy Jr., Peter Lynn Morton, Rachel Aileen Brewton, Chuanmin Hu, Thomas Bryce Kelly, Andrew Robert Solow, Brian Edward Lapointe

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