[PDF] Top 20 Benthic phosphorus cycling in the Peruvian oxygen minimum zone
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Benthic phosphorus cycling in the Peruvian oxygen minimum zone
... ticulate phosphorus rain rates cannot account for measured benthic P fluxes and burial ...modulate benthic P fluxes, and hence explain the missing P ...when oxygen and nitrate levels were ... See full document
20
Benthic Nitrogen Cycling Traversing the Peruvian Oxygen Minimum Zone
... Rate measurements are scarce, but those which do exist generally support this idea (Berelson et al., 1987; Devol and Christensen, 1993; Hartnett and Devol, 2003; Glud et al., 2009; Schwartz et al., 2009; Woulds et al., ... See full document
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The role of benthic foraminifera in the benthic nitrogen cycle of the Peruvian oxygen minimum zone
... are not available. As these species are able to survive un- der anoxic conditions, it is reasonable to assume that they also can use an electron acceptor different from oxygen for their metabolism. Nitrate appears ... See full document
17
The role of benthic foraminifera in the benthic nitrogen cycle of the Peruvian oxygen minimum zone
... are not available. As these species are able to survive un- der anoxic conditions, it is reasonable to assume that they also can use an electron acceptor different from oxygen for their metabolism. Nitrate appears ... See full document
17
Depletion of oxygen, nitrate and nitrite in the Peruvian oxygen minimum zone cause an imbalance of benthic nitrogen fluxes
... nitrogen, Peruvian shelf and upper slope sediments are strong source of reduced fixed N via the activity of sulphur oxidizing bacteria performing ...of oxygen deficient regions depending on whether the ... See full document
37
Sedimentary phosphorus and iron cycling in and below the oxygen minimum zone of the northern Arabian Sea
... 4 Experimental results 4.1 Geochemistry of surface sediments Figure 3 shows the trends in bulk geochemistry of surface sediments (top 2 cm) along the depth transect, with OMZ boundaries as defined in Cowie and Levin ... See full document
22
Sink or link? The bacterial role in benthic carbon cycling in the Arabian Sea’s oxygen minimum zone
... Oxygen concentrations during incubations were successfully maintained close to in situ conditions. The two substrates used were introduced in two different ways: POM was dis- tributed on the core surface, DOM was ... See full document
13
I Ca ratios in benthic foraminifera from the Peruvian oxygen minimum zone: analytical methodology and evaluation as a proxy for redox conditions
... Furthermore, the fact that we observe a strong species de- pendency of the I / Ca ratio accentuates this problem, be- cause the use of bulk species samples which would provide enough material for a sufficient number of ... See full document
19
Nitrogen fixation in sediments along a depth transect through the Peruvian oxygen minimum zone
... controlling benthic diazotrophs in the OMZ appears to be the organic matter ...the Peruvian OMZ sediments were in the same range of other organic-rich ben- thic environments, underlining the relation ... See full document
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Phosphorus cycling in anoxic sediments
... the Peruvian OMZ and the Gotland Basin, both environments share distinct ...where oxygen deficiency ...the Peruvian OMZ is subjected to O 2 fluctuations related to the passage of Kelvin waves which, ... See full document
160
Metagenomic analysis of nitrogen and methane cycling in the Arabian Sea oxygen minimum zone
... In this study, we compared the functional diversity in two metagenomes retrieved from the Arabian Sea oxygen minimum zone. Using manually curated reference databases, we screened the datasets for ... See full document
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Benthic archaea as potential sources of tetraether membrane lipids in sediments across an oxygen minimum zone
... the anoxic marine sediments analyzed here, members of the MCG, DPANN and Euryarchaeota Thermoplasmatales dom- inated. We also observed a high diversity within the MCG with a more diverse population in subsurface ... See full document
18
CO 2maximum in the oxygen minimum zone (OMZ)
... High DIC concentrations (>2225 µmol kg −1 , up to 2350 µmol kg −1 ) have been reported over the whole OMZ thickness, allowing the definition for all studied OMZs a Carbon Maximum Zone (CMZ). Locally off Chile, the ... See full document
14
Diapycnal oxygen supply to the tropical North Atlantic oxygen minimum zone
... hKi oxygen , a profile of diapycnal oxygen flux, h8i, and a profile of di- apycnal flux divergence – we assume that K can be treated as vertically homogeneous through the used depth interval 150 to 500 m ... See full document
15
Trace metal sources and cycling in tropical oxygen minimum zones
... elevated oxygen conditions on the ...in oxygen content in the ETSP relative to typical conditions, with much enhanced seawater oxygenation over the North Peruvian ...and oxygen was not ...to ... See full document
8
Phosphorus cycling in lakes
... (1969), "Physical Factors with Bearing on Eutrophication in Lakes in General and in Large Lakes in Particular", in Eutrophication: Causes, Consequences, Correctives, National [r] ... See full document
56
Macrofaunal colonization across the Indian margin oxygen minimum zone
... and oxygen lev- els, and explored the possible influence of phytodetritus on the type and abundance of colonizing ...with oxygen and depth, there would be a significant difference in community composition ... See full document
17
Effect of oxygen minimum zone formation on communities of marine protists
... sequenced 18S rRNA gene sequences from Saanich Inlet, Cariaco Basin and Framvaren Fjord. 612[r] ... See full document
48
Remineralization of particulate organic carbon in an ocean oxygen minimum zone
... Biological oceanic processes, principally the surface production, sinking and interior remineralization of organic particles, keep atmospheric CO 2 lower than if the ocean was abiotic. The remineralization length scale ... See full document
9
Ocean deoxygenation and copepods: coping with oxygen minimum zone variability
... tant zone for oceanic biogeochemical and export processes that can be affected by oxygen gradients and hosts key food web components for commercial ... See full document
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