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The oceanic fixed nitrogen and nitrous oxide budgets: Moving targets as we enter the anthropocene?*
New data force us to raise previous estimates of oceanic denitrification. Our revised estimate of ~ 450 Tg N yr -1 (Tg = 10 12 g) produces an oceanic fixed N budget with a large deficit (~ 200 Tg NExpand
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Compositions and fluxes of particulate organic material in the Amazon River1
Lignin, elemental, and stable carbon isotope compositions are reported for local plants and for coarse (>63 µm) and fine (<63 µm) suspended particulate materials collected along a 1,950-km reach ofExpand
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The combined effects of ocean acidification, mixing, and respiration on pH and carbonate saturation in an urbanized estuary
Puget Sound is a large estuary complex in the U.S. Pacific Northwest that is home to a diverse and economically important ecosystem threatened by anthropogenic impacts associated with climate change,Expand
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Effects of fungal degradation on the CuO oxidation products of lignin: A controlled laboratory study
Abstract Duplicate samples of birch wood were degraded for 0, 4, 8 and 12 weeks by the white-rot fungus, Phlebia tremellosus, and for 12 weeks by 6 other white-rot and brown-rot fungi. P. tremellosusExpand
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Biogeochemistry of carbon in the Amazon River
Depth-integrated, discharge-weighted water samples were collected over 1,800km ofthe Amazon River on eight cruises at different stages of the hydrograph, 1982-1984. Fine (FPOC, 163 pm) and coarseExpand
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Denitrification as the dominant nitrogen loss process in the Arabian Sea
Primary production in over half of the world’s oceans is limited by fixed nitrogen availability. The main loss term from the fixed nitrogen inventory is the production of dinitrogen gas (N2) byExpand
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Influence of oxygen exposure time on organic carbon preservation in continental margin sediments
Today, over 90% of all organic carbon burial in the ocean occurs in continental margin sediments. This burial is intrinsically linked to the cycling of biogeochemically important elements (such as N,Expand
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A global marine‐fixed nitrogen isotopic budget: Implications for Holocene nitrogen cycling
[1] A nitrogen stable isotopic model was constructed in order to constrain the Holocene marine-fixed nitrogen budget. The primary sources and sinks considered were riverine and atmospheric sources,Expand
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Molecular Evidence for the Broad Distribution of Anaerobic Ammonium-Oxidizing Bacteria in Freshwater and Marine Sediments
ABSTRACT Previously available primer sets for detecting anaerobic ammonium-oxidizing (anammox) bacteria are inefficient, resulting in a very limited database of such sequences, which limits knowledgeExpand
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Nitrite Reductase Genes (nirK andnirS) as Functional Markers To Investigate Diversity of Denitrifying Bacteria in Pacific Northwest Marine Sediment Communities
ABSTRACT Genetic heterogeneity of denitrifying bacteria in sediment samples from Puget Sound and two sites on the Washington continental margin was studied by PCR approaches amplifying nirK andnirSExpand
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