Unknown
PANGAEA
In:
Supplement to: Sokoll, Sarah; Ferdelman, Timothy G; Holtappels, Moritz; Goldhammer, Tobias; Littmann, Sten; Iversen, Morten Hvitfeldt; Kuypers, Marcel MM (2017): Intense biological phosphate uptake onto particles in sub-euphotic continental margin waters. Geophysical Research Letters, 44 (6), 2825–2834, https://doi.org/10.1002/2016GL072183
Publication Date:
2024-03-07
Description:
Elucidating the processes that affect particulate phosphorus (P) export from the euphotic zone and burial in sediments is important for models of global phosphorus, nitrogen, and carbon cycling. We investigated dissolved inorganic Pi incorporation into particles (〉0.2 µm) in the subeuphotic zone and benthic boundary layer of high-productivity Mauritanian and Namibian shelf waters, using 33PO4^3- tracer experiments combined with a sequential chemical extraction analysis. Pi uptake (5.4 to 19.9 nmol P L^-1 d^-1) by particulate matter was biologically mediated (~50% into the organic fraction) and similar to estimated rates of heterotrophic growth. Thus, a substantial fraction of Pi must be recycled through a particle-associated microbial pool. Rapid adsorption of 33P in the anoxic waters of Namibia indicated the additional existence of a large pool of surface exchangeable P. Particle-associated Pi recycling and adsorption may influence the export flux and ultimate fate of particle bound P in continental shelf waters.
Keywords:
Center for Marine Environmental Sciences; MARUM
Type:
Dataset
Format:
application/zip, 12 datasets
Permalink
|
Location |
Call Number |
Limitation |
Availability |