Benthic carbon mineralization on a global scale
نویسندگان
چکیده
منابع مشابه
Carbon sources supporting benthic mineralization
Carbon sources supporting benthic mineralization in mangrove and adjacent seagrass sediments (Gazi Bay, Kenya) S. Bouillon, T. Moens, and F. Dehairs Department of Analytical and Environmental Chemistry, Mangrove Management Group, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium Biology Department, Marine Biology Section, Ghent University, Krijgslaan 281/Sterre S8, B-9000 Gent, ...
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An empirical function is derived for predicting the rate-depth profile of particulate organic carbon (POC) degradation in surface marine sediments including the bioturbated layer. The rate takes the form of a power law analogous to the Middelburg function. The functional parameters were optimized by simulating measured benthic O2 and NO3 fluxes at 185 stations worldwide using a diagenetic model...
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Based on in situ microprofiles, chamber incubations and eddy covariance measurements, we investigated the benthic carbon mineralization and nutrient regeneration in a *65-m-deep sedimentation basin of Loch Etive, UK. The sediment hosted a considerable amount of infauna that was dominated by the brittle star A. filiformis. The numerous burrows were intensively irrigated enhancing the benthic in ...
متن کاملCarbon sources supporting benthic mineralization in mangrove and adjacent seagrass sediments (Gazi Bay, Kenya)
The origin of carbon substrates used by in situ sedimentary bacterial communities was investigated in an intertidal mangrove ecosystem and in adjacent seagrass beds in Gazi bay (Kenya) by δ13C analysis of bacteria-specific PLFA (phospholipid fatty acids) and bulk organic carbon. Export of mangrove-derived organic matter to the adjacent seagrasscovered bay was evident from sedimentary total orga...
متن کاملEffect of the diffusive boundary layer on benthic mineralization and O2 distribution: A theoretical model analysis
On the basis of a dynamic diagenetic model, we evaluate and discuss the effect of the diffusive boundary layer (DBL) on benthic O2 exchange and O2 consuming pathways. The analysis documents that the DBL has only minor importance for the annual O2 uptake of coastal cohesive sediments. Imposing static DBL thicknesses of 300–900 mm decreased the annual O2 uptake by only 2–10% in comparison to a si...
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ژورنال
عنوان ژورنال: Global Biogeochemical Cycles
سال: 2005
ISSN: 0886-6236
DOI: 10.1029/2004gb002225