Tessin_RSTA data file_porewater geochem.xlsx from Benthic phosphorus cycling within the Eurasian marginal sea ice zone

The Arctic Ocean region is currently undergoing dramatic changes, which will likely alter the nutrient cycles that underpin Arctic marine ecosystems. Phosphate is a key limiting nutrient for marine life but gaps in our understanding of the Arctic phosphorus (P) cycle persist. In this study, we inves...

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Bibliographic Details
Main Authors: Allyson Tessin, Christian März, Monika Kędra, Jens Matthiessen, Nathalie Morata, Michael Nairn, Matthew O'Regan, Ilka Peeken
Format: Dataset
Language:unknown
Published: 2020
Subjects:
Geochemistry
Barents Sea slope
Yermak Plateau
sediments
pore waters
nutrient cycling
Arctic
Arctic Ocean
Barents Sea
Sea ice
Yermak plateau
Online Access:https://doi.org/10.6084/m9.figshare.12659413.v1
https://figshare.com/articles/dataset/Tessin_RSTA_data_file_porewater_geochem_xlsx_from_Benthic_phosphorus_cycling_within_the_Eurasian_marginal_sea_ice_zone/12659413
Description
Summary:The Arctic Ocean region is currently undergoing dramatic changes, which will likely alter the nutrient cycles that underpin Arctic marine ecosystems. Phosphate is a key limiting nutrient for marine life but gaps in our understanding of the Arctic phosphorus (P) cycle persist. In this study, we investigate the benthic burial and recycling of phosphorus using sediments and pore waters from the Eurasian Arctic margin, including the Barents Sea slope and the Yermak Plateau. Our results highlight that P is generally lost from sediments with depth during organic matter respiration. On the Yermak Plateau, remobilization of P results in a diffusive flux of P to the seafloor of between 96 and 261 µmol m −2 yr −1 . On the Barents Sea slope, diffusive fluxes of P are much larger (1736–2449 µmol m −2 yr −1 ), but these fluxes are into near-surface sediments rather than to the bottom waters. The difference in cycling on the Barents Sea slope is controlled by higher fluxes of fresh organic matter and active iron cycling. As changes in primary productivity, ocean circulation and glacial melt continue, benthic P cycling is likely to be altered with implications for P imported into the Arctic Ocean Basin.This article is part of the theme issue ‘The Changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystems’.

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