Impacts of Global Change on Ocean Dissolved Organic Carbon (DOC) Cycling
نویسندگان
چکیده
منابع مشابه
Effects of ocean acidification and hydrodynamic conditions on carbon metabolism and dissolved organic carbon (DOC) fluxes in seagrass populations
Global change has been acknowledged as one of the main threats to the biosphere and its provision of ecosystem services, especially in marine ecosystems. Seagrasses play a critical ecological role in coastal ecosystems, but their responses to ocean acidification (OA) and climate change are not well understood. There have been previous studies focused on the effects of OA, but the outcome of int...
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i Table of
متن کاملHidden cycle of dissolved organic carbon in the deep ocean.
Marine dissolved organic carbon (DOC) is a large (660 Pg C) reactive carbon reservoir that mediates the oceanic microbial food web and interacts with climate on both short and long timescales. Carbon isotopic content provides information on the DOC source via δ(13)C and age via Δ(14)C. Bulk isotope measurements suggest a microbially sourced DOC reservoir with two distinct components of differin...
متن کاملRadiocarbon in dissolved organic carbon of the South Pacific Ocean
Marine dissolved organic carbon (DOC) originates mainly from primary production using dissolved inorganic carbon (DIC) that has young C ages. Paradoxically, the C age of deep DOC ranges from 4000 to 6400 C years, indicating that a portion of DOC survives multiple, deep ocean mixing cycles. Here we show that C ages of DOC from the deep South Pacific are equal to those from the deep north central...
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Recent evidence that dissolved organic carbon (DOC) is a significant component of the organic carbon flux below the photic layer of the ocean (1), together with verification of high respiration rates in the dark ocean (2), suggests that the downward flux of DOC may play a major role in supporting respiration there. Here we show, on the basis of examination of the relation between DOC and appare...
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ژورنال
عنوان ژورنال: Frontiers in Marine Science
سال: 2020
ISSN: 2296-7745
DOI: 10.3389/fmars.2020.00466