Benthic nitrogen cycling traversing the Peruvian oxygen minimum zone
نویسندگان
چکیده
منابع مشابه
Benthic phosphorus cycling in the Peruvian oxygen minimum zone
Oxygen minimum zones (OMZs) that impinge on continental margins favor the release of phosphorus (P) from the sediments to the water column, enhancing primary productivity and the maintenance or expansion of low-oxygen waters. A comprehensive field program in the Peruvian OMZ was undertaken to identify the sources of benthic P at six stations, including the analysis of particles from the water c...
متن کاملThe role of benthic foraminifera in the benthic nitrogen cycle of the Peruvian oxygen minimum zone
The discovery that foraminifera are able to use nitrate instead of oxygen as an electron acceptor for respiration has challenged our understanding of nitrogen cycling in the ocean. It was thought before that only prokaryotes and some fungi are able to denitrify. Rate estimates of foraminiferal denitrification have been very sparse and limited to specific regions in the oceans, not comparing sta...
متن کاملRevising the nitrogen cycle in the Peruvian oxygen minimum zone.
The oxygen minimum zone (OMZ) of the Eastern Tropical South Pacific (ETSP) is 1 of the 3 major regions in the world where oceanic nitrogen is lost in the pelagic realm. The recent identification of anammox, instead of denitrification, as the likely prevalent pathway for nitrogen loss in this OMZ raises strong questions about our understanding of nitrogen cycling and organic matter remineralizat...
متن کاملBenthic Dinitrogen Fixation Traversing the Oxygen Minimum Zone Off Mauritania (NW Africa)
1 GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, 2 Danish Institute for Advanced Study & Nordcee, Department of Biology, University of Southern Denmark, Odense, Denmark, 3 Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, Los Angeles, CA, United States, 4 Department of Atmospheric and Oceanic Sciences, University of California, Los Angele...
متن کاملBenthic iron and phosphorus fluxes across the Peruvian oxygen minimum zone
Benthic fluxes of dissolved ferrous iron (Fe2+) and phosphate (TPO4) were quantified by in situ benthic chamber incubations and pore-water profiles along a depth transect (11uS, 80–1000 m) across the Peruvian oxygen minimum zone (OMZ). Bottom-water O2 levels were , 2 mmol L21 down to 500-m water depth, and increased to , 40 mmol L21 at 1000 m. Fe2+ fluxes were highest on the shallow shelf (maxi...
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ژورنال
عنوان ژورنال: Geochimica et Cosmochimica Acta
سال: 2011
ISSN: 0016-7037
DOI: 10.1016/j.gca.2011.08.010