Journal ArticleDOI
Seasonal change in the flux of organic carbon to the deep Sargasso Sea
W. G. Deuser,E.H. Ross +1 more
TLDR
In this paper, the first direct measurements of seasonal change in the total flux of particles <13 cm and in the flux of organic carbon associated with those particles are reported, and the change seems to be related to seasonal changes in the primary productivity of the surface water.Abstract:
Recent evidence1–5 has suggested that diurnal and annual periodicities affect the deep sea which traditionally had been thought to be the least variable environment at the surface of the Earth6,7. We report here what we believe to be the first direct measurements of seasonal change in the total flux of particles <13 cm and in the flux of organic carbon associated with those particles. The change seems to be related to seasonal change in the primary productivity of the surface water.read more
Citations
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Journal ArticleDOI
Particulate organic carbon flux in the oceans—surface productivity and oxygen utilization
TL;DR: In this paper, an empirical relationship was established that predicts organic carbon flux at any depth in the oceans below the base of the euphotic zone as a function of the mean net primary production rate at the surface and depth-dependent consumption.
Journal ArticleDOI
Barium in Deep-Sea Sediment: A Geochemical Proxy for Paleoproductivity
TL;DR: In this paper, the authors used sediment traps to define the particulate fluxes of barium and organic carbon and investigate the use of Barium as a proxy for ocean fertility.
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Seasonal sedimentation of phytoplankton to the deep-sea benthos
TL;DR: In this article, a similar seasonal pulse of detrital material to bathyal and abyssal depths in temperate latitudes is presented, this material seems to be derived directly from the surface primary production and to sink rapidly to the deep-sea benthos.
Journal ArticleDOI
A dynamic regulatory model of phytoplanktonic acclimation to light, nutrients, and temperature
TL;DR: A new regulatory model can describe acclimation of phytoplankton growth rate, chlorophyll a : carbon ratio and nitrogen: carbon ratio to irradiance, temperature and nutrient availability and treats respiration as the sum of the maintenance metabolic requirement and the cost of biosynthesis.
Journal ArticleDOI
Distribution of thorium isotopes between dissolved and particulate forms in the deep sea
TL;DR: The distribution of 234Th, 230Th, and 228Th between dissolved and particulate forms was determined in 17 seawater samples from the Guatemala and Panama basins as discussed by the authors, where the seawater first passed through a Nuclepore filter (1.0-μm pore size) and then through a cartridge packed with Nitex netting that was impregnated with MnO2 to scavenge the dissolved Th isotopes.
References
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Journal ArticleDOI
Benthic community respiration in the N.W. Atlantic Ocean: in situ measurements from 40 to 5200 m
TL;DR: Calculations show that annual benthic respiration can utilize 1 to 2% of the surface primary productivity and that of the 2 to 7% organic carbon fixed at the surface which supposedly reaches the bottom, only 15 to 29% is utilized by the benthics community at 2200, 3000, and 3650 m.
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Annual variations in primary production of the Sargasso sea off Bermuda
D.W. Menzel,John H. Ryther +1 more
TL;DR: In this article, seasonal and year-to-year changes were observed in the ratio net : gross production, as indicated by changes in the relationship between C 14 assimilation and chlorophyll.
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Ecology of Recent planktonic foraminifera--Part 2, Bathymetric and seasonal distributions in the Sargasso Sea off Nermuda
TL;DR: In this paper, the bathymetric distribution of planktonic Foraminifera indicate that they are most abundant in the euphotic zone of the oceanic waters around Bermuda.
Journal ArticleDOI
Slow growth rate of a deep-sea clam determined by 228Ra chronology.
Karl K. Turekian,J. K. Cochran,D P Kharkar,Robert M. Cerrato,J R Vaisnys,Howard L. Sanders,J F Grassle,J A Allen +7 more
TL;DR: The age of a deep-sea clam, Tindaria callistiformis, from 3803 m depth has been determined by 228Ra (6.7 year half-life) chronology of separated size fractions of a captured population.