Iron speciation in the eastern tropical South Pacific oxygen minimum zone off Peru
نویسندگان
چکیده
منابع مشابه
What prevents nitrogen depletion in the oxygen minimum zone of the eastern tropical South Pacific?
Local coupling between nitrogen fixation and denitrification in current biogeochemical models could result in runaway feedback in open-ocean oxygen minimum zones (OMZs), eventually stripping OMZ waters of all fixed nitrogen. This feedback does not seem to operate at full strength in the ocean, as nitrate does not generally become depleted in open-ocean OMZs. To explore in detail the possible me...
متن کاملA dissolved cobalt plume in the oxygen minimum zone of the eastern tropical South Pacific
Cobalt is a nutrient to phytoplankton, but knowledge about its biogeochemical cycling is limited, especially in the Pacific Ocean. Here, we report sections of dissolved cobalt and labile dissolved cobalt from the US GEOTRACES GP16 transect in the South Pacific. The cobalt distribution is closely tied to the extent and intensity of the oxygen minimum zone in the eastern South Pacific with highes...
متن کاملNovel lineages of Prochlorococcus thrive within the oxygen minimum zone of the eastern tropical South Pacific.
The eastern tropical Pacific Ocean holds two of the main oceanic oxygen minimum zones of the global ocean. The presence of an oxygen-depleted layer at intermediate depths, which also impinges on the seafloor and in some cases the euphotic zone, plays a significant role in structuring both pelagic and benthic communities, and also in the vertical partitioning of microbial assemblages. Here, we a...
متن کاملCommunity Composition of Nitrous Oxide Consuming Bacteria in the Oxygen Minimum Zone of the Eastern Tropical South Pacific
The ozone-depleting and greenhouse gas, nitrous oxide (N2O), is mainly consumed by the microbially mediated anaerobic process, denitrification. N2O consumption is the last step in canonical denitrification, and is also the least O2 tolerant step. Community composition of total and active N2O consuming bacteria was analyzed based on total (DNA) and transcriptionally active (RNA) nitrous oxide re...
متن کاملOxygen minimum zone expansion in the eastern tropical North Pacific during deglaciation
[1] During deglaciation at 17 ka the intensity and footprint of the oxygen minimum zone (OMZ) increased in the Eastern Tropical North Pacific (ETNP) before a subsequent expansion on the California Margin. Evidence for the earlier increase is found in trace metal concentrations, lamination preservation and dN values from cores located between 540–750 m water depth in the Gulf of Tehuantepec, Sou...
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 2014
ISSN: 0024-3590
DOI: 10.4319/lo.2014.59.6.1945